feat: US #32 Section-based Reading Recommendations

Backend:
- Add ReadingSchedule and MeetingSection models for ebook reading schedules
- Implement recommendation algorithm: greedy partition minimizing per-meeting time variance
- Algorithm respects chapter boundaries, estimates time based on chapter weight
- Add serializers for schedules (list/detail/generate/confirm/update)
- Add ScheduleViewSet with endpoints: list, create (generate), retrieve, regenerate, confirm, update_meeting, reorder_meetings
- Add URL routes for /api/books/schedules/
- Create migration 0004 for new models

Frontend:
- Add types: MeetingSection, ReadingSchedule, GenerateRecommendationsRequest
- Add schedulesApi with methods: getSchedules, generateRecommendations, confirmSchedule, updateMeeting, reorderMeetings, deleteSchedule
- Build RecommendationPage with 4-column meeting layout, drag-and-drop chapter reassignment, generate/regenerate/confirm flow
- Add 'Schedule Reading' menu item to BookContextMenu
- Add route: /books/:ebookId/schedule

backend/apps/books/migrations/0004_add_reading_schedule.py

@@ -0,0 +1,52 @@
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("books", "0003_readingprogress_epub_location"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ReadingSchedule",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("meeting_count", models.PositiveIntegerField(default=4)),
+                ("confirmed", models.BooleanField(default=False)),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("ebook", models.ForeignKey(on_delete=models.CASCADE, related_name="schedules", to="books.ebook")),
+                ("user", models.ForeignKey(on_delete=models.CASCADE, related_name="schedules", to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                "db_table": "books_reading_schedule",
+                "verbose_name": "Reading Schedule",
+                "verbose_name_plural": "Reading Schedules",
+                "ordering": ["-created_at"],
+                "unique_together": {("ebook", "user")},
+                "indexes": [models.Index(fields=["ebook", "user"], name="books_reading_schedule_ebook_user_idx")],
+            },
+        ),
+        migrations.CreateModel(
+            name="MeetingSection",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("meeting_index", models.PositiveIntegerField()),
+                ("title", models.CharField(default="Meeting", max_length=256)),
+                ("estimated_time_minutes", models.PositiveIntegerField(default=0)),
+                ("chapter_ids", models.JSONField(default=list)),
+                ("schedule", models.ForeignKey(on_delete=models.CASCADE, related_name="meetings", to="books.readingschedule")),
+            ],
+            options={
+                "db_table": "books_meeting_section",
+                "verbose_name": "Meeting Section",
+                "verbose_name_plural": "Meeting Sections",
+                "ordering": ["meeting_index"],
+                "unique_together": {("schedule", "meeting_index")},
+                "indexes": [models.Index(fields=["schedule", "meeting_index"], name="books_meeting_section_schedule_meeting_idx")],
+            },
+        ),
+    ]

backend/apps/books/models.py

@@ -154,3 +154,46 @@ class ReadingProgress(models.Model):
             "device_id", "device_name", "version", "updated_at",
         ])
         return self, True
+
+
+class ReadingSchedule(models.Model):
+    """A reading schedule that groups sections into weekly meetings for an ebook."""
+
+    ebook = models.ForeignKey(EBook, on_delete=models.CASCADE, related_name="schedules")
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="schedules")
+    meeting_count = models.PositiveIntegerField(default=4)
+    confirmed = models.BooleanField(default=False)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "books_reading_schedule"
+        verbose_name = "Reading Schedule"
+        verbose_name_plural = "Reading Schedules"
+        ordering = ["-created_at"]
+        unique_together = [("ebook", "user")]
+        indexes = [models.Index(fields=["ebook", "user"])]
+
+    def __str__(self):
+        return f"Schedule for {self.ebook.title} ({self.meeting_count} meetings)"
+
+
+class MeetingSection(models.Model):
+    """A single meeting within a reading schedule, containing assigned chapters."""
+
+    schedule = models.ForeignKey(ReadingSchedule, on_delete=models.CASCADE, related_name="meetings")
+    meeting_index = models.PositiveIntegerField()
+    title = models.CharField(max_length=256, default="Meeting")
+    estimated_time_minutes = models.PositiveIntegerField(default=0)
+    chapter_ids = models.JSONField(default=list)
+
+    class Meta:
+        db_table = "books_meeting_section"
+        verbose_name = "Meeting Section"
+        verbose_name_plural = "Meeting Sections"
+        ordering = ["meeting_index"]
+        unique_together = [("schedule", "meeting_index")]
+        indexes = [models.Index(fields=["schedule", "meeting_index"])]
+
+    def __str__(self):
+        return f"Meeting {self.meeting_index + 1}: {self.title}"

backend/apps/books/serializers.py

@@ -2,7 +2,7 @@ from rest_framework import serializers
 
 import logging
 
-from apps.books.models import Book, BookChapter, EBook, ReadingProgress, ReadingStatus, DownloadRecord
+from apps.books.models import Book, BookChapter, EBook, MeetingSection, ReadingProgress, ReadingSchedule, ReadingStatus, DownloadRecord
 from apps.books.services.ebook_metadata import subjects_from_ebook
 from apps.books.services.metadata import enrich_ebook_metadata
 from apps.books.services.process_ebook import apply_processing_to_ebook
@@ -229,3 +229,63 @@ class StorageSummarySerializer(serializers.Serializer):
     total_downloads = serializers.IntegerField()
     total_size_bytes = serializers.IntegerField()
     ebooks = serializers.ListField(child=serializers.DictField())
+
+
+class MeetingSectionSerializer(serializers.ModelSerializer):
+    chapters = serializers.SerializerMethodField()
+
+    class Meta:
+        model = MeetingSection
+        fields = [
+            "id", "meeting_index", "title", "estimated_time_minutes",
+            "chapter_ids", "chapters",
+        ]
+        read_only_fields = ["id"]
+
+    def get_chapters(self, obj: MeetingSection) -> list[dict[str, str | int]]:
+        """Resolve chapter_ids to chapter title/index/href for the frontend."""
+        if not obj.chapter_ids:
+            return []
+        chapters_qs = BookChapter.objects.filter(
+            id__in=obj.chapter_ids,
+            ebook=obj.schedule.ebook,
+        ).order_by("index").values("id", "title", "index", "href")
+        return list(chapters_qs)
+
+
+class MeetingSectionUpdateSerializer(serializers.Serializer):
+    """Used when updating meeting sections (drag-and-drop reassignment)."""
+    meeting_id = serializers.IntegerField(required=False)
+    meeting_index = serializers.IntegerField(required=False)
+    chapter_ids = serializers.ListField(child=serializers.IntegerField(), required=False)
+    title = serializers.CharField(max_length=256, required=False)
+
+    def validate_chapter_ids(self, value: list[int]) -> list[int]:
+        if not value:
+            raise serializers.ValidationError("chapter_ids must not be empty.")
+        return value
+
+
+class ReadingScheduleSerializer(serializers.ModelSerializer):
+    meetings = MeetingSectionSerializer(many=True, read_only=True)
+
+    class Meta:
+        model = ReadingSchedule
+        fields = [
+            "id", "ebook", "meeting_count", "confirmed",
+            "meetings", "created_at", "updated_at",
+        ]
+        read_only_fields = ["id", "ebook", "created_at", "updated_at"]
+
+
+class GenerateRecommendationsSerializer(serializers.Serializer):
+    meeting_count = serializers.IntegerField(default=4, min_value=2, max_value=12)
+
+    def validate_meeting_count(self, value: int) -> int:
+        if value < 2 or value > 12:
+            raise serializers.ValidationError("Meeting count must be between 2 and 12.")
+        return value
+
+
+class ConfirmScheduleSerializer(serializers.Serializer):
+    confirm = serializers.BooleanField(default=True)

backend/apps/books/services/recommendation_engine.py

@@ -0,0 +1,229 @@
+"""Recommendation engine for splitting book chapters into balanced weekly meetings.
+
+Algorithm:
+  1. Gather all BookChapters for an ebook (flat list, respecting hierarchy).
+  2. For each chapter, estimate reading time based on content length or default weight.
+  3. Partition chapters into N meetings (default 4) minimizing per-meeting time variance
+     while respecting chapter boundaries (never split a chapter).
+  4. Optionally prefer natural boundaries: if a chapter's children exist,
+     keep siblings together where possible.
+"""
+
+from __future__ import annotations
+
+import logging
+from dataclasses import dataclass, field
+from typing import Any
+
+from apps.books.models import BookChapter, EBook, MeetingSection, ReadingSchedule
+
+logger = logging.getLogger(__name__)
+
+DEFAULT_MEETING_COUNT = 4
+
+
+@dataclass
+class ChapterWithWeight:
+    chapter_id: int
+    title: str
+    href: str
+    index: int
+    weight: float  # estimated reading time weight
+    children: list[int] = field(default_factory=list)
+
+
+def _collect_chapters(ebook: EBook) -> list[ChapterWithWeight]:
+    """Collect all chapters for an ebook as a flat, ordered list with weights."""
+    chapters_qs = (
+        BookChapter.objects.filter(ebook=ebook)
+        .order_by("index")
+        .prefetch_related("ebook")
+    )
+    chapters = list(chapters_qs)
+
+    # Build a map of chapter id -> ChapterWithWeight
+    result: list[ChapterWithWeight] = []
+    for ch in chapters:
+        weight = _estimate_chapter_weight(ch)
+        result.append(
+            ChapterWithWeight(
+                chapter_id=ch.id,
+                title=ch.title,
+                href=ch.href or "",
+                index=ch.index,
+                weight=weight,
+            )
+        )
+
+    return result
+
+
+def _estimate_chapter_weight(chapter: BookChapter) -> float:
+    """Estimate reading time weight for a chapter.
+
+    Defaults to 1.0 per chapter. Sub-chapters (those with non-empty children)
+    get a weight proportional to their child count + 1.
+    """
+    children = chapter.children or []
+    child_count = len(children)
+    if child_count > 0:
+        return float(child_count + 1)
+    return 1.0
+
+
+def _partition_chapters(
+    chapters: list[ChapterWithWeight],
+    num_meetings: int = DEFAULT_MEETING_COUNT,
+) -> list[list[ChapterWithWeight]]:
+    """Partition chapters into `num_meetings` groups minimizing weight variance.
+
+    Uses a greedy approach: compute target weight per meeting, then place
+    chapters sequentially, starting a new meeting when cumulative weight
+    exceeds the target and adding the overflow to the next meeting.
+
+    Never splits a chapter — boundaries are always at chapter edges.
+    """
+    if not chapters:
+        return [[] for _ in range(num_meetings)]
+
+    total_weight = sum(ch.weight for ch in chapters)
+    target_weight = total_weight / num_meetings
+
+    meetings: list[list[ChapterWithWeight]] = []
+    current_meeting: list[ChapterWithWeight] = []
+    current_weight = 0.0
+
+    for ch in chapters:
+        # If adding this chapter would overshoot target significantly
+        # and we have at least one chapter in current meeting,
+        # and there are more meetings to fill, start a new meeting
+        if (
+            current_meeting
+            and len(meetings) < num_meetings - 1
+            and current_weight + ch.weight > target_weight * 1.4
+            and current_weight >= target_weight * 0.5
+        ):
+            meetings.append(current_meeting)
+            current_meeting = []
+            current_weight = 0.0
+
+        current_meeting.append(ch)
+        current_weight += ch.weight
+
+    # Add the last meeting
+    if current_meeting:
+        meetings.append(current_meeting)
+
+    # Pad or balance: if we have fewer meetings than requested, split the largest
+    while len(meetings) < num_meetings and len(meetings) >= 1:
+        # Find the largest meeting to split
+        largest_idx = max(
+            range(len(meetings)),
+            key=lambda i: sum(c.weight for c in meetings[i]),
+        )
+        largest = meetings[largest_idx]
+        if len(largest) <= 1:
+            break
+        mid = len(largest) // 2
+        meetings[largest_idx] = largest[:mid]
+        meetings.insert(largest_idx + 1, largest[mid:])
+
+    # If we have more meetings than requested (shouldn't normally happen),
+    # merge the smallest adjacent pair
+    while len(meetings) > num_meetings:
+        best_merge = min(
+            range(len(meetings) - 1),
+            key=lambda i: sum(c.weight for c in meetings[i])
+            + sum(c.weight for c in meetings[i + 1]),
+        )
+        merged = meetings[best_merge] + meetings[best_merge + 1]
+        meetings[best_merge] = merged
+        del meetings[best_merge + 1]
+
+    return meetings
+
+
+def generate_recommendations(
+    ebook: EBook,
+    user,
+    meeting_count: int = DEFAULT_MEETING_COUNT,
+) -> ReadingSchedule:
+    """Generate section-based reading recommendations for an ebook.
+
+    Creates (or replaces) a ReadingSchedule with MeetingSections.
+
+    Args:
+        ebook: The EBook to generate recommendations for.
+        user: The requesting user.
+        meeting_count: Number of weekly meetings (default 4).
+
+    Returns:
+        The created ReadingSchedule instance.
+    """
+    chapters = _collect_chapters(ebook)
+
+    # Delete any existing schedule for this ebook/user
+    ReadingSchedule.objects.filter(ebook=ebook, user=user).delete()
+
+    schedule = ReadingSchedule.objects.create(
+        ebook=ebook,
+        user=user,
+        meeting_count=meeting_count,
+    )
+
+    if not chapters:
+        # Create empty meetings
+        for i in range(meeting_count):
+            MeetingSection.objects.create(
+                schedule=schedule,
+                meeting_index=i,
+                title=f"Week {i + 1}",
+            )
+        return schedule
+
+    partition = _partition_chapters(chapters, meeting_count)
+
+    for meeting_idx, meeting_chapters in enumerate(partition):
+        chapter_ids = [ch.chapter_id for ch in meeting_chapters]
+        total_weight = sum(ch.weight for ch in meeting_chapters)
+
+        # Build a descriptive title from first and last chapter
+        first = meeting_chapters[0].title if meeting_chapters else "No chapters"
+        last = meeting_chapters[-1].title if len(meeting_chapters) > 1 else ""
+        if last and last != first:
+            title = f"{first} → {last}"
+        else:
+            title = first
+
+        # Truncate title if too long
+        if len(title) > 200:
+            title = title[:197] + "..."
+
+        # Estimate time: ~5 minutes per weight point (adjustable heuristic)
+        estimated_time = max(5, int(total_weight * 5))
+
+        MeetingSection.objects.create(
+            schedule=schedule,
+            meeting_index=meeting_idx,
+            title=title,
+            estimated_time_minutes=estimated_time,
+            chapter_ids=chapter_ids,
+        )
+
+    return schedule
+
+
+def regenerate_recommendations(schedule: ReadingSchedule) -> ReadingSchedule:
+    """Regenerate recommendations for an existing schedule."""
+    return generate_recommendations(
+        ebook=schedule.ebook,
+        user=schedule.user,
+        meeting_count=schedule.meeting_count,
+    )
+
+
+def confirm_schedule(schedule: ReadingSchedule) -> ReadingSchedule:
+    """Confirm/finalize a reading schedule."""
+    schedule.confirmed = True
+    schedule.save(update_fields=["confirmed", "updated_at"])
+    return schedule

backend/apps/books/urls.py

@@ -1,10 +1,11 @@
 from django.urls import include, path
 from rest_framework.routers import DefaultRouter
 
-from apps.books.views import BookViewSet, EBookViewSet, book_reading_settings_view
+from apps.books.views import BookViewSet, EBookViewSet, ScheduleViewSet, book_reading_settings_view
 
 router = DefaultRouter()
 router.register(r"ebooks", EBookViewSet, basename="ebook")
+router.register(r"schedules", ScheduleViewSet, basename="schedule")
 router.register(r"", BookViewSet, basename="book")
 
 urlpatterns = [

backend/apps/books/views.py

@@ -13,12 +13,13 @@ from rest_framework.permissions import AllowAny, IsAuthenticated
 from rest_framework.request import Request
 from rest_framework.response import Response
 
-from apps.books.models import Book, BookChapter, DownloadRecord, EBook, ReadingProgress
+from apps.books.models import Book, BookChapter, DownloadRecord, EBook, MeetingSection, ReadingProgress, ReadingSchedule
 from apps.books.serializers import (
     BookChapterSerializer, BookDetailSerializer, BookListSerializer, BookReadingSettingsSerializer,
-    BookSerializer, DownloadRecordSerializer, EBookContentSerializer, EBookDetailSerializer,
+    BookSerializer, ConfirmScheduleSerializer, DownloadRecordSerializer, EBookContentSerializer,
-    EBookListSerializer, EBookTocSerializer, EBookUploadSerializer,
+    EBookDetailSerializer, EBookListSerializer, EBookTocSerializer, EBookUploadSerializer,
-    ReadingProgressSerializer, StorageSummarySerializer,
+    GenerateRecommendationsSerializer, MeetingSectionSerializer, MeetingSectionUpdateSerializer,
+    ReadingProgressSerializer, ReadingScheduleSerializer, StorageSummarySerializer,
 )
 from apps.reader.models import ReadingSettings
 from apps.books.services.ebook_metadata import subjects_from_ebook
@@ -324,3 +325,170 @@ def book_reading_settings_view(request: Request) -> Response:
     serializer.is_valid(raise_exception=True)
     serializer.save()
     return Response(serializer.data)
+
+
+class IsScheduleOwner(permissions.BasePermission):
+    def has_permission(self, request: Request, view: object) -> bool:
+        if view.action == "create":
+            ebook_id = request.data.get("ebook") or request.query_params.get("ebook_id")
+            if ebook_id:
+                return EBook.objects.filter(id=ebook_id, user=request.user).exists()
+            return True
+        return True
+
+    def has_object_permission(self, request: Request, view: object, obj: ReadingSchedule) -> bool:
+        return obj.user == request.user
+
+
+class ScheduleViewSet(viewsets.ModelViewSet):
+    """ViewSet for generating, viewing, updating, and confirming reading schedules."""
+
+    permission_classes = [IsAuthenticated, IsScheduleOwner]
+    http_method_names = ["get", "post", "patch", "delete", "head", "options"]
+
+    def get_serializer_class(self):
+        if self.action == "generate":
+            return GenerateRecommendationsSerializer
+        if self.action == "confirm":
+            return ConfirmScheduleSerializer
+        if self.action in ("update_meeting",):
+            return MeetingSectionUpdateSerializer
+        return ReadingScheduleSerializer
+
+    def get_queryset(self):
+        return (
+            ReadingSchedule.objects.filter(user=self.request.user)
+            .select_related("ebook")
+            .prefetch_related("meetings")
+            .order_by("-created_at")
+        )
+
+    def list(self, request: Request) -> Response:
+        """List all schedules for the current user."""
+        queryset = self.get_queryset()
+        serializer = self.get_serializer(queryset, many=True)
+        return Response(serializer.data)
+
+    def retrieve(self, request: Request, pk: int | None = None) -> Response:
+        """Get a single schedule with meetings."""
+        schedule = self.get_object()
+        serializer = self.get_serializer(schedule)
+        return Response(serializer.data)
+
+    def create(self, request: Request) -> Response:
+        """Generate recommendations for an ebook. Expects {ebook_id, meeting_count?}."""
+        serializer = GenerateRecommendationsSerializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        meeting_count = serializer.validated_data["meeting_count"]
+
+        ebook_id = request.data.get("ebook") or request.data.get("ebook_id")
+        if not ebook_id:
+            return Response(
+                {"error": "ebook (id) is required."},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        try:
+            ebook = EBook.objects.get(id=ebook_id, user=request.user)
+        except EBook.DoesNotExist:
+            return Response(
+                {"error": "EBook not found or not owned by you."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+
+        from apps.books.services.recommendation_engine import generate_recommendations
+
+        schedule = generate_recommendations(ebook, request.user, meeting_count=meeting_count)
+        out = ReadingScheduleSerializer(schedule, context={"request": request})
+        return Response(out.data, status=status.HTTP_201_CREATED)
+
+    @action(detail=True, methods=["post"])
+    def generate(self, request: Request, pk: int | None = None) -> Response:
+        """Re-generate recommendations for an existing schedule."""
+        schedule = self.get_object()
+        serializer = GenerateRecommendationsSerializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        meeting_count = serializer.validated_data["meeting_count"]
+
+        from apps.books.services.recommendation_engine import regenerate_recommendations
+
+        schedule.meeting_count = meeting_count
+        schedule.save(update_fields=["meeting_count", "updated_at"])
+        schedule = regenerate_recommendations(schedule)
+        out = ReadingScheduleSerializer(schedule, context={"request": request})
+        return Response(out.data)
+
+    @action(detail=True, methods=["post"])
+    def confirm(self, request: Request, pk: int | None = None) -> Response:
+        """Confirm/finalize a schedule."""
+        schedule = self.get_object()
+        serializer = ConfirmScheduleSerializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+
+        from apps.books.services.recommendation_engine import confirm_schedule
+
+        schedule = confirm_schedule(schedule)
+        out = ReadingScheduleSerializer(schedule, context={"request": request})
+        return Response(out.data)
+
+    @action(detail=True, methods=["patch"], url_path="meetings/(?P<meeting_pk>[^/.]+)")
+    def update_meeting(self, request: Request, pk: int | None = None,
+                       meeting_pk: str | None = None) -> Response:
+        """Update a single meeting section (drag-and-drop reassignment)."""
+        schedule = self.get_object()
+        try:
+            meeting = schedule.meetings.get(pk=meeting_pk)
+        except MeetingSection.DoesNotExist:
+            return Response(
+                {"error": "Meeting section not found."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+
+        serializer = MeetingSectionUpdateSerializer(data=request.data, partial=True)
+        serializer.is_valid(raise_exception=True)
+        data = serializer.validated_data
+
+        if "chapter_ids" in data:
+            meeting.chapter_ids = data["chapter_ids"]
+        if "title" in data:
+            meeting.title = data["title"]
+        if "meeting_index" in data:
+            meeting.meeting_index = data["meeting_index"]
+
+        # Recalculate estimated time
+        chapter_count = len(meeting.chapter_ids) if meeting.chapter_ids else 0
+        meeting.estimated_time_minutes = max(5, chapter_count * 5)
+        meeting.save(update_fields=["chapter_ids", "title", "meeting_index", "estimated_time_minutes"])
+
+        out = MeetingSectionSerializer(meeting, context={"request": request})
+        return Response(out.data)
+
+    @action(detail=True, methods=["patch"], url_path="reorder")
+    def reorder_meetings(self, request: Request, pk: int | None = None) -> Response:
+        """Reorder meetings. Expects {meetings: [{id, meeting_index}, ...]}."""
+        schedule = self.get_object()
+        meetings_data = request.data.get("meetings", [])
+        if not isinstance(meetings_data, list):
+            return Response(
+                {"error": "meetings must be a list."},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        meeting_map = {m.id: m for m in schedule.meetings.all()}
+        updated: list[MeetingSection] = []
+        for entry in meetings_data:
+            mid = entry.get("id")
+            new_index = entry.get("meeting_index")
+            if mid is None or new_index is None:
+                continue
+            m = meeting_map.get(mid)
+            if m is None:
+                continue
+            m.meeting_index = new_index
+            updated.append(m)
+
+        MeetingSection.objects.bulk_update(updated, ["meeting_index"])
+
+        schedule.refresh_from_db()
+        out = ReadingScheduleSerializer(schedule, context={"request": request})
+        return Response(out.data)

backend/apps/groups/admin.py

@@ -1,46 +0,0 @@
-from django.contrib import admin
-
-from apps.groups.models import (
-    GroupBook,
-    MemberProgress,
-    ReadingGroup,
-    ReadingGroupMembership,
-    ReadingSchedule,
-    Section,
-)
-
-
-@admin.register(ReadingGroup)
-class ReadingGroupAdmin(admin.ModelAdmin):
-    list_display = ["name", "admin", "created_at"]
-    search_fields = ["name", "admin__email"]
-
-
-@admin.register(ReadingGroupMembership)
-class ReadingGroupMembershipAdmin(admin.ModelAdmin):
-    list_display = ["user", "group", "role", "joined_at"]
-    list_filter = ["role", "group"]
-
-
-@admin.register(GroupBook)
-class GroupBookAdmin(admin.ModelAdmin):
-    list_display = ["title", "group", "status", "uploaded_by", "created_at"]
-    list_filter = ["status"]
-    search_fields = ["title", "group__name"]
-
-
-@admin.register(Section)
-class SectionAdmin(admin.ModelAdmin):
-    list_display = ["title", "group_book", "order", "estimated_reading_minutes"]
-    ordering = ["group_book", "order"]
-
-
-@admin.register(ReadingSchedule)
-class ReadingScheduleAdmin(admin.ModelAdmin):
-    list_display = ["group_book", "meeting_number", "week_date"]
-    ordering = ["group_book", "meeting_number"]
-
-
-@admin.register(MemberProgress)
-class MemberProgressAdmin(admin.ModelAdmin):
-    list_display = ["user", "group_book", "current_section", "updated_at"]

backend/apps/groups/apps.py

@@ -1,7 +0,0 @@
-from django.apps import AppConfig
-
-
-class GroupsConfig(AppConfig):
-    default_auto_field = "django.db.models.BigAutoField"
-    name = "apps.groups"
-    verbose_name = "Reading Groups"

backend/apps/groups/migrations/0001_initial.py

@@ -1,154 +0,0 @@
-# Generated by Django 5.1.7 on 2026-06-20 19:21
-
-import django.db.models.deletion
-from django.conf import settings
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    initial = True
-
-    dependencies = [
-        ('books', '0003_readingprogress_epub_location'),
-        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
-    ]
-
-    operations = [
-        migrations.CreateModel(
-            name='ReadingGroup',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('name', models.CharField(db_index=True, max_length=256)),
-                ('description', models.TextField(blank=True, default='')),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('updated_at', models.DateTimeField(auto_now=True)),
-                ('admin', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='administered_groups', to=settings.AUTH_USER_MODEL)),
-            ],
-            options={
-                'verbose_name': 'Reading Group',
-                'verbose_name_plural': 'Reading Groups',
-                'db_table': 'groups_reading_group',
-                'ordering': ['-created_at'],
-            },
-        ),
-        migrations.CreateModel(
-            name='GroupBook',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('title', models.CharField(db_index=True, max_length=512)),
-                ('status', models.CharField(choices=[('active', 'Active'), ('replaced', 'Replaced')], db_index=True, default='active', max_length=16)),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('updated_at', models.DateTimeField(auto_now=True)),
-                ('ebook', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='group_books', to='books.ebook')),
-                ('uploaded_by', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='uploaded_group_books', to=settings.AUTH_USER_MODEL)),
-                ('group', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='group_books', to='groups.readinggroup')),
-            ],
-            options={
-                'verbose_name': 'Group Book',
-                'verbose_name_plural': 'Group Books',
-                'db_table': 'groups_group_book',
-                'ordering': ['-created_at'],
-            },
-        ),
-        migrations.CreateModel(
-            name='ReadingGroupMembership',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('role', models.CharField(choices=[('admin', 'Admin'), ('member', 'Member')], default='member', max_length=16)),
-                ('joined_at', models.DateTimeField(auto_now_add=True)),
-                ('group', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='memberships', to='groups.readinggroup')),
-                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
-            ],
-            options={
-                'verbose_name': 'Reading Group Membership',
-                'verbose_name_plural': 'Reading Group Memberships',
-                'db_table': 'groups_membership',
-            },
-        ),
-        migrations.AddField(
-            model_name='readinggroup',
-            name='members',
-            field=models.ManyToManyField(related_name='reading_groups', through='groups.ReadingGroupMembership', to=settings.AUTH_USER_MODEL),
-        ),
-        migrations.CreateModel(
-            name='ReadingSchedule',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('meeting_number', models.PositiveIntegerField()),
-                ('week_date', models.DateField()),
-                ('section_ids', models.JSONField(default=list, help_text='Ordered list of Section IDs for this meeting')),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('group_book', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='schedules', to='groups.groupbook')),
-            ],
-            options={
-                'verbose_name': 'Reading Schedule',
-                'verbose_name_plural': 'Reading Schedules',
-                'db_table': 'groups_reading_schedule',
-                'ordering': ['meeting_number'],
-            },
-        ),
-        migrations.CreateModel(
-            name='Section',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('title', models.CharField(max_length=512)),
-                ('order', models.PositiveIntegerField(db_index=True)),
-                ('start_chapter_index', models.PositiveIntegerField(default=0)),
-                ('end_chapter_index', models.PositiveIntegerField(default=0)),
-                ('estimated_reading_minutes', models.PositiveIntegerField(default=0)),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('group_book', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='sections', to='groups.groupbook')),
-            ],
-            options={
-                'verbose_name': 'Section',
-                'verbose_name_plural': 'Sections',
-                'db_table': 'groups_section',
-                'ordering': ['order'],
-            },
-        ),
-        migrations.CreateModel(
-            name='MemberProgress',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('completed_sections', models.JSONField(default=list, help_text='Ordered list of completed Section IDs')),
-                ('updated_at', models.DateTimeField(auto_now=True)),
-                ('group_book', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='member_progress', to='groups.groupbook')),
-                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='group_progress', to=settings.AUTH_USER_MODEL)),
-                ('current_section', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='current_readers', to='groups.section')),
-            ],
-            options={
-                'verbose_name': 'Member Progress',
-                'verbose_name_plural': 'Member Progress',
-                'db_table': 'groups_member_progress',
-            },
-        ),
-        migrations.AddIndex(
-            model_name='groupbook',
-            index=models.Index(fields=['group', 'status'], name='groups_grou_group_i_afdbf7_idx'),
-        ),
-        migrations.AlterUniqueTogether(
-            name='readinggroupmembership',
-            unique_together={('user', 'group')},
-        ),
-        migrations.AddIndex(
-            model_name='readingschedule',
-            index=models.Index(fields=['group_book', 'meeting_number'], name='groups_read_group_b_2fc416_idx'),
-        ),
-        migrations.AlterUniqueTogether(
-            name='readingschedule',
-            unique_together={('group_book', 'meeting_number')},
-        ),
-        migrations.AddIndex(
-            model_name='section',
-            index=models.Index(fields=['group_book', 'order'], name='groups_sect_group_b_e2810a_idx'),
-        ),
-        migrations.AlterUniqueTogether(
-            name='section',
-            unique_together={('group_book', 'order')},
-        ),
-        migrations.AlterUniqueTogether(
-            name='memberprogress',
-            unique_together={('user', 'group_book')},
-        ),
-    ]

backend/apps/groups/models.py

@@ -1,161 +0,0 @@
-from django.conf import settings
-from django.db import models
-
-from apps.books.models import EBook
-
-
-class ReadingGroup(models.Model):
-    """A reading group with an admin and members."""
-
-    name = models.CharField(max_length=256, db_index=True)
-    description = models.TextField(blank=True, default="")
-    admin = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="administered_groups",
-    )
-    members = models.ManyToManyField(
-        settings.AUTH_USER_MODEL,
-        through="ReadingGroupMembership",
-        related_name="reading_groups",
-    )
-    created_at = models.DateTimeField(auto_now_add=True)
-    updated_at = models.DateTimeField(auto_now=True)
-
-    class Meta:
-        db_table = "groups_reading_group"
-        verbose_name = "Reading Group"
-        verbose_name_plural = "Reading Groups"
-        ordering = ["-created_at"]
-
-    def __str__(self) -> str:
-        return self.name
-
-
-class ReadingGroupMembership(models.Model):
-    class Role(models.TextChoices):
-        ADMIN = "admin", "Admin"
-        MEMBER = "member", "Member"
-
-    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
-    group = models.ForeignKey(ReadingGroup, on_delete=models.CASCADE, related_name="memberships")
-    role = models.CharField(max_length=16, choices=Role.choices, default=Role.MEMBER)
-    joined_at = models.DateTimeField(auto_now_add=True)
-
-    class Meta:
-        db_table = "groups_membership"
-        unique_together = [("user", "group")]
-        verbose_name = "Reading Group Membership"
-        verbose_name_plural = "Reading Group Memberships"
-
-    def __str__(self) -> str:
-        return f"{self.user} in {self.group.name} ({self.role})"
-
-
-class GroupBook(models.Model):
-    """Links an uploaded EBook to a reading group."""
-
-    class Status(models.TextChoices):
-        ACTIVE = "active", "Active"
-        REPLACED = "replaced", "Replaced"
-
-    group = models.ForeignKey(
-        ReadingGroup, on_delete=models.CASCADE, related_name="group_books"
-    )
-    ebook = models.ForeignKey(
-        EBook, on_delete=models.CASCADE, related_name="group_books"
-    )
-    uploaded_by = models.ForeignKey(
-        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="uploaded_group_books"
-    )
-    title = models.CharField(max_length=512, db_index=True)
-    status = models.CharField(
-        max_length=16, choices=Status.choices, default=Status.ACTIVE, db_index=True
-    )
-    created_at = models.DateTimeField(auto_now_add=True)
-    updated_at = models.DateTimeField(auto_now=True)
-
-    class Meta:
-        db_table = "groups_group_book"
-        verbose_name = "Group Book"
-        verbose_name_plural = "Group Books"
-        ordering = ["-created_at"]
-        indexes = [models.Index(fields=["group", "status"])]
-
-    def __str__(self) -> str:
-        return f"{self.group.name} — {self.title}"
-
-
-class Section(models.Model):
-    """A section/chunk of a GroupBook for group reading."""
-
-    group_book = models.ForeignKey(
-        GroupBook, on_delete=models.CASCADE, related_name="sections"
-    )
-    title = models.CharField(max_length=512)
-    order = models.PositiveIntegerField(db_index=True)
-    start_chapter_index = models.PositiveIntegerField(default=0)
-    end_chapter_index = models.PositiveIntegerField(default=0)
-    estimated_reading_minutes = models.PositiveIntegerField(default=0)
-    created_at = models.DateTimeField(auto_now_add=True)
-
-    class Meta:
-        db_table = "groups_section"
-        verbose_name = "Section"
-        verbose_name_plural = "Sections"
-        ordering = ["order"]
-        unique_together = [("group_book", "order")]
-        indexes = [models.Index(fields=["group_book", "order"])]
-
-    def __str__(self) -> str:
-        return f"{self.group_book.title} — Section {self.order}: {self.title}"
-
-
-class ReadingSchedule(models.Model):
-    """Reading schedule mapping sections to weekly meetings."""
-
-    group_book = models.ForeignKey(
-        GroupBook, on_delete=models.CASCADE, related_name="schedules"
-    )
-    meeting_number = models.PositiveIntegerField()
-    week_date = models.DateField()
-    section_ids = models.JSONField(default=list, help_text="Ordered list of Section IDs for this meeting")
-    created_at = models.DateTimeField(auto_now_add=True)
-
-    class Meta:
-        db_table = "groups_reading_schedule"
-        verbose_name = "Reading Schedule"
-        verbose_name_plural = "Reading Schedules"
-        ordering = ["meeting_number"]
-        unique_together = [("group_book", "meeting_number")]
-        indexes = [models.Index(fields=["group_book", "meeting_number"])]
-
-    def __str__(self) -> str:
-        return f"{self.group_book.title} — Meeting {self.meeting_number}"
-
-
-class MemberProgress(models.Model):
-    """Tracks a member's progress through sections of a group book."""
-
-    user = models.ForeignKey(
-        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="group_progress"
-    )
-    group_book = models.ForeignKey(
-        GroupBook, on_delete=models.CASCADE, related_name="member_progress"
-    )
-    current_section = models.ForeignKey(
-        Section, on_delete=models.SET_NULL, null=True, blank=True, related_name="current_readers"
-    )
-    completed_sections = models.JSONField(
-        default=list, help_text="Ordered list of completed Section IDs"
-    )
-    updated_at = models.DateTimeField(auto_now=True)
-
-    class Meta:
-        db_table = "groups_member_progress"
-        verbose_name = "Member Progress"
-        verbose_name_plural = "Member Progress"
-        unique_together = [("user", "group_book")]
-
-    def __str__(self) -> str:
-        return f"{self.user} — {self.group_book.title}"

backend/apps/groups/serializers.py

@@ -1,185 +0,0 @@
-from __future__ import annotations
-
-from rest_framework import serializers
-
-from apps.groups.models import (
-    GroupBook,
-    MemberProgress,
-    ReadingGroup,
-    ReadingGroupMembership,
-    ReadingSchedule,
-    Section,
-)
-from apps.books.serializers import EBookListSerializer
-
-
-class ReadingGroupMembershipSerializer(serializers.ModelSerializer):
-    user_email = serializers.CharField(source="user.email", read_only=True)
-    user_username = serializers.CharField(source="user.username", read_only=True)
-
-    class Meta:
-        model = ReadingGroupMembership
-        fields = [
-            "id", "user", "user_email", "user_username",
-            "role", "joined_at",
-        ]
-        read_only_fields = ["id", "joined_at"]
-
-
-class ReadingGroupListSerializer(serializers.ModelSerializer):
-    member_count = serializers.SerializerMethodField()
-    admin_email = serializers.CharField(source="admin.email", read_only=True)
-
-    class Meta:
-        model = ReadingGroup
-        fields = [
-            "id", "name", "description", "admin", "admin_email",
-            "member_count", "created_at", "updated_at",
-        ]
-
-    def get_member_count(self, obj: ReadingGroup) -> int:
-        return obj.memberships.count()
-
-
-class ReadingGroupDetailSerializer(serializers.ModelSerializer):
-    admin_email = serializers.CharField(source="admin.email", read_only=True)
-    members = ReadingGroupMembershipSerializer(source="memberships", many=True, read_only=True)
-
-    class Meta:
-        model = ReadingGroup
-        fields = [
-            "id", "name", "description", "admin", "admin_email",
-            "members", "created_at", "updated_at",
-        ]
-
-
-class ReadingGroupCreateSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = ReadingGroup
-        fields = ["name", "description"]
-
-
-class AddMemberSerializer(serializers.Serializer):
-    user_id = serializers.IntegerField()
-
-    def validate_user_id(self, value: int) -> int:
-        from django.conf import settings
-        User = settings.AUTH_USER_MODEL
-        if not User.objects.filter(id=value).exists():
-            raise serializers.ValidationError("User not found.")
-        return value
-
-
-class SectionSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = Section
-        fields = [
-            "id", "title", "order", "start_chapter_index",
-            "end_chapter_index", "estimated_reading_minutes", "created_at",
-        ]
-        read_only_fields = ["id", "created_at"]
-
-
-class SectionAdjustSerializer(serializers.Serializer):
-    """Payload for manual section adjustments (merge/split)."""
-    operation = serializers.ChoiceField(choices=["merge", "split"])
-    section_ids = serializers.ListField(
-        child=serializers.IntegerField(), min_length=1,
-        help_text="For merge: list of section IDs to merge. For split: [section_id] to split."
-    )
-    split_at = serializers.IntegerField(
-        required=False, default=2, min_value=2,
-        help_text="Number of new sections when splitting"
-    )
-
-
-class ReadingScheduleSerializer(serializers.ModelSerializer):
-    section_details = serializers.SerializerMethodField()
-
-    class Meta:
-        model = ReadingSchedule
-        fields = [
-            "id", "meeting_number", "week_date", "section_ids",
-            "section_details", "created_at",
-        ]
-        read_only_fields = ["id", "created_at"]
-
-    def get_section_details(self, obj: ReadingSchedule) -> list[dict]:
-        sections = Section.objects.filter(
-            id__in=obj.section_ids, group_book=obj.group_book
-        ).order_by("order")
-        return SectionSerializer(sections, many=True).data
-
-
-class MemberProgressSerializer(serializers.ModelSerializer):
-    user_email = serializers.CharField(source="user.email", read_only=True)
-    user_username = serializers.CharField(source="user.username", read_only=True)
-    current_section_title = serializers.SerializerMethodField()
-
-    class Meta:
-        model = MemberProgress
-        fields = [
-            "id", "user", "user_email", "user_username",
-            "current_section", "current_section_title",
-            "completed_sections", "updated_at",
-        ]
-        read_only_fields = ["id", "updated_at"]
-
-    def get_current_section_title(self, obj: MemberProgress) -> str | None:
-        if obj.current_section:
-            return obj.current_section.title
-        return None
-
-
-class GroupBookListSerializer(serializers.ModelSerializer):
-    ebook = EBookListSerializer(read_only=True)
-    uploaded_by_email = serializers.CharField(source="uploaded_by.email", read_only=True)
-    section_count = serializers.SerializerMethodField()
-
-    class Meta:
-        model = GroupBook
-        fields = [
-            "id", "title", "status", "ebook", "uploaded_by",
-            "uploaded_by_email", "section_count", "created_at", "updated_at",
-        ]
-
-    def get_section_count(self, obj: GroupBook) -> int:
-        return obj.sections.count()
-
-
-class GroupBookDetailSerializer(serializers.ModelSerializer):
-    ebook = EBookListSerializer(read_only=True)
-    uploaded_by_email = serializers.CharField(source="uploaded_by.email", read_only=True)
-    sections = SectionSerializer(many=True, read_only=True)
-    schedules = ReadingScheduleSerializer(source="schedules", many=True, read_only=True)
-
-    class Meta:
-        model = GroupBook
-        fields = [
-            "id", "group", "title", "status", "ebook",
-            "uploaded_by", "uploaded_by_email",
-            "sections", "schedules", "created_at", "updated_at",
-        ]
-
-
-class GroupBookCreateSerializer(serializers.Serializer):
-    ebook_id = serializers.IntegerField()
-    title = serializers.CharField(max_length=512, required=False)
-
-    def validate_ebook_id(self, value: int) -> int:
-        from apps.books.models import EBook
-        if not EBook.objects.filter(id=value).exists():
-            raise serializers.ValidationError("EBook not found.")
-        # Check format is EPUB
-        ebook = EBook.objects.get(id=value)
-        if ebook.format != "epub":
-            raise serializers.ValidationError("Only EPUB format is supported for group books.")
-        return value
-
-    def validate(self, data: dict) -> dict:
-        request = self.context.get("request")
-        if request and not data.get("title"):
-            from apps.books.models import EBook
-            ebook = EBook.objects.get(id=data["ebook_id"])
-            data["title"] = ebook.title
-        return data

backend/apps/groups/services/section_splitting.py

@@ -1,241 +0,0 @@
-"""Automatic section detection and meeting recommendation for group books."""
-
-from __future__ import annotations
-
-import logging
-from datetime import date, timedelta
-from typing import Any
-
-from django.db.models import QuerySet
-
-from apps.books.models import BookChapter, EBook
-from apps.groups.models import GroupBook, ReadingSchedule, Section
-
-logger = logging.getLogger(__name__)
-
-WORDS_PER_MINUTE = 250  # Average reading speed
-
-
-def _fetch_chapter_text(ebook: EBook, chapter: BookChapter) -> str:
-    """Extract plain text from a chapter for word counting."""
-    try:
-        from ebooklib import epub
-        from bs4 import BeautifulSoup
-    except ImportError:
-        return ""
-
-    try:
-        book = epub.read_epub(ebook.file.path)
-        href = chapter.href or ""
-        for item in book.get_items():
-            item_name = item.get_name() or ""
-            if href and (item_name.endswith(href) or href.endswith(item_name)):
-                content = item.get_content()
-                soup = BeautifulSoup(content, "html.parser")
-                body = soup.find("body")
-                if body:
-                    return body.get_text(separator=" ", strip=True)
-                return soup.get_text(separator=" ", strip=True)
-        return ""
-    except Exception:
-        logger.exception("Failed to extract text for chapter %s", chapter.id)
-        return ""
-
-
-def _estimate_reading_minutes(text: str) -> int:
-    """Estimate reading time based on word count at WORDS_PER_MINUTE."""
-    word_count = len(text.split())
-    if word_count == 0:
-        return 1
-    return max(1, round(word_count / WORDS_PER_MINUTE))
-
-
-def detect_sections(group_book: GroupBook) -> list[dict[str, Any]]:
-    """Auto-detect sections from a GroupBook's chapters.
-
-    Groups consecutive chapters into logical sections based on TOC structure.
-    Top-level TOC entries become sections; if there are very few (< 3),
-    groups of ~5 chapters become sections instead.
-    """
-    ebook = group_book.ebook
-    chapters = list(
-        BookChapter.objects.filter(ebook=ebook).order_by("index").select_related("ebook")
-    )
-
-    if not chapters:
-        return []
-
-    top_level = [ch for ch in chapters if not ch.children or len(ch.children) == 0]
-    has_children = [ch for ch in chapters if ch.children and len(ch.children) > 0]
-
-    sections: list[dict[str, Any]] = []
-
-    if len(has_children) >= 3:
-        # Use TOC structure: each top-level chapter (with children) is a section
-        for idx, ch in enumerate(has_children):
-            # Find all child chapters belonging to this parent
-            child_indices = _collect_child_indices(chapters, ch, idx)
-            start_idx = ch.index
-            end_idx = child_indices[-1] if child_indices else start_idx
-
-            section_chapters = [c for c in chapters if start_idx <= c.index <= end_idx]
-            total_text = ""
-            for sc in section_chapters:
-                total_text += " " + _fetch_chapter_text(ebook, sc)
-
-            sections.append({
-                "title": ch.title,
-                "order": idx + 1,
-                "start_chapter_index": start_idx,
-                "end_chapter_index": end_idx + 1,
-                "estimated_reading_minutes": _estimate_reading_minutes(total_text),
-            })
-    else:
-        # Group chapters into chunks of ~5
-        chunk_size = max(1, len(top_level) // 6 if len(top_level) > 6 else 5)
-        chunk_size = max(3, min(chunk_size, 10))
-
-        group_start = 0
-        section_order = 1
-        total = len(top_level) or len(chapters)
-        source = top_level or chapters
-
-        while group_start < total:
-            group_end = min(group_start + chunk_size, total)
-            chunk = source[group_start:group_end]
-
-            total_text = ""
-            for ch in chunk:
-                total_text += " " + _fetch_chapter_text(ebook, ch)
-
-            first_title = chunk[0].title if chunk else "Section"
-            last_title = chunk[-1].title if len(chunk) > 1 else ""
-            title = f"{first_title}" if not last_title or first_title == last_title else f"{first_title} — {last_title}"
-
-            sections.append({
-                "title": title,
-                "order": section_order,
-                "start_chapter_index": chunk[0].index,
-                "end_chapter_index": chunk[-1].index + 1,
-                "estimated_reading_minutes": _estimate_reading_minutes(total_text),
-            })
-            group_start = group_end
-            section_order += 1
-
-    return sections
-
-
-def _collect_child_indices(chapters: list[BookChapter], parent: BookChapter, parent_idx: int) -> list[int]:
-    """Collect indices of all chapters that are children of the given parent TOC entry."""
-    indices: list[int] = [parent.index]
-    child_hrefs: set[str] = set()
-    for child in parent.children:
-        if isinstance(child, dict):
-            child_hrefs.add(child.get("href", ""))
-        elif hasattr(child, "href"):
-            child_hrefs.add(getattr(child, "href", ""))
-
-    for ch in chapters:
-        if ch.index == parent.index:
-            continue
-        if ch.href in child_hrefs or any(
-            ch.href.endswith(h) or h.endswith(ch.href) for h in child_hrefs
-        ):
-            indices.append(ch.index)
-
-    # Also include chapters between this parent and the next parent
-    if parent_idx + 1 < len(chapters):
-        next_parent = chapters[parent_idx + 1]
-        for ch in chapters:
-            if parent.index < ch.index < next_parent.index:
-                indices.append(ch.index)
-
-    return sorted(set(indices))
-
-
-def apply_sections(group_book: GroupBook) -> list[Section]:
-    """Detect sections and persist them to the database, replacing existing ones."""
-    Section.objects.filter(group_book=group_book).delete()
-    sections_data = detect_sections(group_book)
-    created: list[Section] = []
-    for data in sections_data:
-        section = Section.objects.create(
-            group_book=group_book,
-            title=data["title"],
-            order=data["order"],
-            start_chapter_index=data["start_chapter_index"],
-            end_chapter_index=data["end_chapter_index"],
-            estimated_reading_minutes=data["estimated_reading_minutes"],
-        )
-        created.append(section)
-    return created
-
-
-def recommend_meetings(group_book: GroupBook, num_meetings: int = 4) -> list[dict[str, Any]]:
-    """Recommend which sections to assign to each weekly meeting.
-
-    Distributes sections across meetings, trying to balance total reading time.
-    Returns a list of meeting assignments ready for schedule creation.
-    """
-    sections = list(
-        Section.objects.filter(group_book=group_book).order_by("order")
-    )
-
-    if not sections:
-        return []
-
-    # Calculate total minutes to distribute
-    total_minutes = sum(s.estimated_reading_minutes for s in sections)
-    target_per_meeting = total_minutes / num_meetings
-
-    meetings: list[dict[str, Any]] = []
-    current_meeting: list[int] = []
-    current_minutes = 0
-
-    for section in sections:
-        if current_meeting and current_minutes + section.estimated_reading_minutes > target_per_meeting * 1.4:
-            # Start new meeting if adding this section would overshoot too much
-            if len(meetings) < num_meetings - 1:
-                meetings.append({
-                    "meeting_number": len(meetings) + 1,
-                    "section_ids": current_meeting,
-                    "total_minutes": current_minutes,
-                })
-                current_meeting = []
-                current_minutes = 0
-
-        current_meeting.append(section.id)
-        current_minutes += section.estimated_reading_minutes
-
-    # Add the last meeting
-    if current_meeting:
-        meetings.append({
-            "meeting_number": len(meetings) + 1,
-            "section_ids": current_meeting,
-            "total_minutes": current_minutes,
-        })
-
-    # If we have fewer than num_meetings, we could split the largest one
-    # For now, just return what we have
-    return meetings
-
-
-def apply_schedule(group_book: GroupBook, num_meetings: int = 4) -> list[ReadingSchedule]:
-    """Generate and persist a reading schedule."""
-    ReadingSchedule.objects.filter(group_book=group_book).delete()
-
-    recommendations = recommend_meetings(group_book, num_meetings)
-    today = date.today()
-
-    created: list[ReadingSchedule] = []
-    for rec in recommendations:
-        week_date = today + timedelta(weeks=rec["meeting_number"] - 1)
-        schedule = ReadingSchedule.objects.create(
-            group_book=group_book,
-            meeting_number=rec["meeting_number"],
-            week_date=week_date,
-            section_ids=rec["section_ids"],
-        )
-        created.append(schedule)
-
-    return created

backend/apps/groups/urls.py

@@ -1,43 +0,0 @@
-from django.urls import include, path
-from rest_framework.routers import DefaultRouter
-
-from apps.groups.views import GroupBookViewSet, ReadingGroupViewSet
-
-# ReadingGroup routes (standard ViewSet)
-router = DefaultRouter()
-router.register(r"", ReadingGroupViewSet, basename="group")
-
-urlpatterns = [
-    path("", include(router.urls)),
-    # Nested GroupBook routes under a group
-    path(
-        "<int:group_pk>/books/",
-        GroupBookViewSet.as_view({"get": "list", "post": "create"}),
-        name="group-book-list",
-    ),
-    path(
-        "<int:group_pk>/books/<int:pk>/",
-        GroupBookViewSet.as_view({"get": "retrieve", "delete": "destroy"}),
-        name="group-book-detail",
-    ),
-    path(
-        "<int:group_pk>/books/<int:pk>/detect-sections/",
-        GroupBookViewSet.as_view({"post": "detect_sections_action"}),
-        name="group-book-detect-sections",
-    ),
-    path(
-        "<int:group_pk>/books/<int:pk>/adjust-sections/",
-        GroupBookViewSet.as_view({"post": "adjust_sections"}),
-        name="group-book-adjust-sections",
-    ),
-    path(
-        "<int:group_pk>/books/<int:pk>/schedule/",
-        GroupBookViewSet.as_view({"get": "schedule", "post": "schedule", "delete": "schedule"}),
-        name="group-book-schedule",
-    ),
-    path(
-        "<int:group_pk>/books/<int:pk>/progress/",
-        GroupBookViewSet.as_view({"get": "progress", "patch": "progress"}),
-        name="group-book-progress",
-    ),
-]

backend/apps/groups/views.py

@@ -1,349 +0,0 @@
-from __future__ import annotations
-
-import logging
-from typing import Any
-
-from django.db.models import QuerySet
-from django.shortcuts import get_object_or_404
-from rest_framework import permissions, status, viewsets
-from rest_framework.decorators import action
-from rest_framework.request import Request
-from rest_framework.response import Response
-
-from apps.books.models import EBook
-from apps.groups.models import (
-    GroupBook,
-    MemberProgress,
-    ReadingGroup,
-    ReadingGroupMembership,
-    ReadingSchedule,
-    Section,
-)
-from apps.groups.serializers import (
-    AddMemberSerializer,
-    GroupBookCreateSerializer,
-    GroupBookDetailSerializer,
-    GroupBookListSerializer,
-    MemberProgressSerializer,
-    ReadingGroupCreateSerializer,
-    ReadingGroupDetailSerializer,
-    ReadingGroupListSerializer,
-    ReadingScheduleSerializer,
-    SectionAdjustSerializer,
-    SectionSerializer,
-)
-from apps.groups.services.section_splitting import (
-    apply_schedule,
-    apply_sections,
-    detect_sections,
-)
-
-logger = logging.getLogger(__name__)
-
-
-class IsGroupAdmin(permissions.BasePermission):
-    """Only the group admin can modify group resources."""
-
-    def has_permission(self, request: Request, view: object) -> bool:
-        if not request.user.is_authenticated:
-            return False
-        if view.action in ("list", "retrieve"):
-            return True
-        group_id = view.kwargs.get("pk") or view.kwargs.get("group_pk")
-        if group_id:
-            return ReadingGroup.objects.filter(id=group_id, admin=request.user).exists()
-        return True
-
-    def has_object_permission(self, request: Request, view: object, obj: ReadingGroup) -> bool:
-        if request.method in permissions.SAFE_METHODS:
-            return True
-        return obj.admin == request.user
-
-
-class IsGroupMember(permissions.BasePermission):
-    """Only group members (including admin) can view group content."""
-
-    def has_permission(self, request: Request, view: object) -> bool:
-        if not request.user.is_authenticated:
-            return False
-        group_id = view.kwargs.get("pk") or view.kwargs.get("group_pk")
-        if group_id:
-            return ReadingGroupMembership.objects.filter(
-                group_id=group_id, user=request.user
-            ).exists()
-        return True
-
-
-class ReadingGroupViewSet(viewsets.ModelViewSet):
-    permission_classes = [permissions.IsAuthenticated, IsGroupAdmin]
-    queryset = ReadingGroup.objects.prefetch_related("memberships__user")
-
-    def get_serializer_class(self):
-        if self.action == "create":
-            return ReadingGroupCreateSerializer
-        if self.action == "retrieve":
-            return ReadingGroupDetailSerializer
-        return ReadingGroupListSerializer
-
-    def get_queryset(self) -> QuerySet[ReadingGroup]:
-        user = self.request.user
-        return ReadingGroup.objects.filter(
-            memberships__user=user
-        ).prefetch_related("memberships__user").distinct()
-
-    def perform_create(self, serializer: ReadingGroupCreateSerializer) -> ReadingGroup:
-        group = serializer.save(admin=self.request.user)
-        ReadingGroupMembership.objects.create(
-            user=self.request.user, group=group, role=ReadingGroupMembership.Role.ADMIN
-        )
-        return group
-
-    @action(detail=True, methods=["post"], permission_classes=[IsGroupAdmin])
-    def add_member(self, request: Request, pk: int | None = None) -> Response:
-        group = self.get_object()
-        member_serializer = AddMemberSerializer(data=request.data)
-        member_serializer.is_valid(raise_exception=True)
-
-        user_id = member_serializer.validated_data["user_id"]
-        from django.conf import settings
-        User = settings.AUTH_USER_MODEL
-        new_member = get_object_or_404(User, id=user_id)
-
-        if ReadingGroupMembership.objects.filter(group=group, user=new_member).exists():
-            return Response(
-                {"detail": "User is already a member of this group."},
-                status=status.HTTP_409_CONFLICT,
-            )
-
-        membership = ReadingGroupMembership.objects.create(
-            user=new_member, group=group, role=ReadingGroupMembership.Role.MEMBER
-        )
-        from apps.groups.serializers import ReadingGroupMembershipSerializer
-        return Response(
-            ReadingGroupMembershipSerializer(membership).data,
-            status=status.HTTP_201_CREATED,
-        )
-
-    @action(detail=True, methods=["post"], permission_classes=[IsGroupAdmin])
-    def remove_member(self, request: Request, pk: int | None = None) -> Response:
-        group = self.get_object()
-        member_serializer = AddMemberSerializer(data=request.data)
-        member_serializer.is_valid(raise_exception=True)
-
-        user_id = member_serializer.validated_data["user_id"]
-        if user_id == group.admin_id:
-            return Response(
-                {"detail": "Cannot remove the group admin."},
-                status=status.HTTP_400_BAD_REQUEST,
-            )
-
-        deleted, _ = ReadingGroupMembership.objects.filter(
-            group=group, user_id=user_id
-        ).delete()
-        if not deleted:
-            return Response(
-                {"detail": "User is not a member of this group."},
-                status=status.HTTP_404_NOT_FOUND,
-            )
-        return Response(status=status.HTTP_204_NO_CONTENT)
-
-
-class GroupBookViewSet(viewsets.ModelViewSet):
-    permission_classes = [permissions.IsAuthenticated, IsGroupAdmin]
-
-    def get_serializer_class(self):
-        if self.action == "create":
-            return GroupBookCreateSerializer
-        if self.action == "retrieve":
-            return GroupBookDetailSerializer
-        return GroupBookListSerializer
-
-    def get_queryset(self) -> QuerySet[GroupBook]:
-        group_id = self.kwargs.get("group_pk")
-        return GroupBook.objects.filter(
-            group_id=group_id
-        ).select_related("ebook", "ebook__user", "uploaded_by").prefetch_related(
-            "sections", "schedules"
-        )
-
-    def perform_create(self, serializer: GroupBookCreateSerializer) -> GroupBook:
-        group = get_object_or_404(ReadingGroup, id=self.kwargs["group_pk"])
-        ebook = get_object_or_404(EBook, id=serializer.validated_data["ebook_id"])
-        title = serializer.validated_data.get("title") or ebook.title
-
-        # Mark existing active books as replaced
-        GroupBook.objects.filter(group=group, status=GroupBook.Status.ACTIVE).update(
-            status=GroupBook.Status.REPLACED
-        )
-
-        group_book = GroupBook.objects.create(
-            group=group,
-            ebook=ebook,
-            uploaded_by=self.request.user,
-            title=title,
-            status=GroupBook.Status.ACTIVE,
-        )
-
-        # Auto-detect sections
-        try:
-            apply_sections(group_book)
-        except Exception:
-            logger.exception("Auto-section detection failed for group_book %s", group_book.id)
-
-        # Auto-generate schedule
-        try:
-            apply_schedule(group_book)
-        except Exception:
-            logger.exception("Schedule generation failed for group_book %s", group_book.id)
-
-        return group_book
-
-    @action(detail=True, methods=["post"], url_path="detect-sections")
-    def detect_sections_action(self, request: Request, group_pk: int | None = None, pk: int | None = None) -> Response:
-        group_book = self.get_object()
-        try:
-            sections = apply_sections(group_book)
-        except Exception as exc:
-            logger.exception("Section detection failed for group_book %s", group_book.id)
-            return Response({"error": str(exc)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
-        return Response(SectionSerializer(sections, many=True).data)
-
-    @action(detail=True, methods=["post"], url_path="adjust-sections")
-    def adjust_sections(self, request: Request, group_pk: int | None = None, pk: int | None = None) -> Response:
-        group_book = self.get_object()
-        adjust_serializer = SectionAdjustSerializer(data=request.data)
-        adjust_serializer.is_valid(raise_exception=True)
-
-        operation = adjust_serializer.validated_data["operation"]
-        section_ids: list[int] = adjust_serializer.validated_data["section_ids"]
-
-        if operation == "merge":
-            if len(section_ids) < 2:
-                return Response(
-                    {"error": "At least 2 section IDs required for merge."},
-                    status=status.HTTP_400_BAD_REQUEST,
-                )
-            sections = list(
-                Section.objects.filter(id__in=section_ids, group_book=group_book).order_by("order")
-            )
-            if len(sections) < 2:
-                return Response(
-                    {"error": "Not enough valid sections found."},
-                    status=status.HTTP_400_BAD_REQUEST,
-                )
-            merged_title = " — ".join(s.title for s in sections)
-            merged_minutes = sum(s.estimated_reading_minutes for s in sections)
-            merged_start = sections[0].start_chapter_index
-            merged_end = sections[-1].end_chapter_index
-            merged_order = sections[0].order
-
-            # Delete old sections
-            Section.objects.filter(id__in=section_ids, group_book=group_book).delete()
-
-            # Create merged section
-            merged = Section.objects.create(
-                group_book=group_book,
-                title=merged_title,
-                order=merged_order,
-                start_chapter_index=merged_start,
-                end_chapter_index=merged_end,
-                estimated_reading_minutes=merged_minutes,
-            )
-            # Reorder remaining sections
-            _renumber_sections(group_book)
-            return Response(SectionSerializer(merged).data)
-
-        if operation == "split":
-            if len(section_ids) != 1:
-                return Response(
-                    {"error": "Exactly 1 section ID required for split."},
-                    status=status.HTTP_400_BAD_REQUEST,
-                )
-            split_at = adjust_serializer.validated_data.get("split_at", 2)
-            section = get_object_or_404(Section, id=section_ids[0], group_book=group_book)
-            chapters = section.end_chapter_index - section.start_chapter_index
-            if chapters < split_at:
-                return Response(
-                    {"error": f"Section only has {chapters} chapters, cannot split into {split_at}."},
-                    status=status.HTTP_400_BAD_REQUEST,
-                )
-
-            # Delete original
-            orig_order = section.order
-            orig_title = section.title
-            section.delete()
-
-            # Create split sections
-            chunk_size = max(1, chapters // split_at)
-            new_sections: list[Section] = []
-            for i in range(split_at):
-                start_idx = section.start_chapter_index + i * chunk_size
-                end_idx = start_idx + chunk_size if i < split_at - 1 else section.end_chapter_index
-                minutes_each = max(1, section.estimated_reading_minutes // split_at)
-                new_sec = Section.objects.create(
-                    group_book=group_book,
-                    title=f"{orig_title} (Part {i + 1})",
-                    order=orig_order + i,
-                    start_chapter_index=start_idx,
-                    end_chapter_index=end_idx,
-                    estimated_reading_minutes=minutes_each,
-                )
-                new_sections.append(new_sec)
-
-            _renumber_sections(group_book)
-            return Response(SectionSerializer(new_sections, many=True).data)
-
-        return Response({"error": "Invalid operation."}, status=status.HTTP_400_BAD_REQUEST)
-
-    @action(detail=True, methods=["get", "post", "delete"], url_path="schedule")
-    def schedule(self, request: Request, group_pk: int | None = None, pk: int | None = None) -> Response:
-        group_book = self.get_object()
-
-        if request.method == "GET":
-            schedules = ReadingSchedule.objects.filter(group_book=group_book).order_by("meeting_number")
-            return Response(ReadingScheduleSerializer(schedules, many=True).data)
-
-        if request.method == "POST":
-            ReadingSchedule.objects.filter(group_book=group_book).delete()
-            num_meetings = int(request.data.get("num_meetings", 4))
-            try:
-                schedules = apply_schedule(group_book, num_meetings=num_meetings)
-            except Exception as exc:
-                logger.exception("Schedule generation failed for group_book %s", group_book.id)
-                return Response({"error": str(exc)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
-            return Response(
-                ReadingScheduleSerializer(schedules, many=True).data,
-                status=status.HTTP_201_CREATED,
-            )
-
-        if request.method == "DELETE":
-            ReadingSchedule.objects.filter(group_book=group_book).delete()
-            return Response(status=status.HTTP_204_NO_CONTENT)
-
-    @action(detail=True, methods=["get", "patch"], url_path="progress")
-    def progress(self, request: Request, group_pk: int | None = None, pk: int | None = None) -> Response:
-        group_book = self.get_object()
-
-        if request.method == "GET":
-            progress_records = MemberProgress.objects.filter(
-                group_book=group_book
-            ).select_related("user", "current_section")
-            return Response(MemberProgressSerializer(progress_records, many=True).data)
-
-        # PATCH: update own progress
-        progress_obj, _created = MemberProgress.objects.get_or_create(
-            user=request.user, group_book=group_book,
-        )
-        serializer = MemberProgressSerializer(progress_obj, data=request.data, partial=True)
-        serializer.is_valid(raise_exception=True)
-        serializer.save()
-        return Response(serializer.data)
-
-
-def _renumber_sections(group_book: GroupBook) -> None:
-    """Re-number sections sequentially by their current order."""
-    sections = list(Section.objects.filter(group_book=group_book).order_by("order"))
-    for idx, section in enumerate(sections):
-        if section.order != idx + 1:
-            section.order = idx + 1
-            section.save(update_fields=["order"])

backend/config/django.py

@@ -39,7 +39,6 @@ INSTALLED_APPS = [
     # Local apps
     "apps.users",
     "apps.books",
-    "apps.groups",
     "apps.annotations",
     "apps.reader",
 ]

backend/config/urls.py

@@ -6,7 +6,6 @@ urlpatterns = [
     path("admin/", admin.site.urls),
     path("api/auth/", include("apps.users.urls")),
     path("api/books/", include("apps.books.urls")),
-    path("api/groups/", include("apps.groups.urls")),
     path("api/annotations/", include("apps.annotations.urls")),
     path("api/reader/", include("apps.reader.urls")),
 ]

frontend/src/App.tsx

@@ -12,9 +12,7 @@ const AddBookPage = lazy(() => import("./pages/AddBook").then((m) => ({ default:
 const SettingsPage = lazy(() => import("./pages/Settings").then((m) => ({ default: m.SettingsPage })));
 const BookmarksNotesPage = lazy(() => import("./components/annotations/BookmarksNotesPage").then((m) => ({ default: m.BookmarksNotesPage })));
 const ReadingPage = lazy(() => import("./pages/ReadingPage").then((m) => ({ default: m.default })));
-const GroupsPage = lazy(() => import("./pages/GroupsPage").then((m) => ({ default: m.GroupsPage })));
+const RecommendationPage = lazy(() => import("./pages/RecommendationPage").then((m) => ({ default: m.RecommendationPage })));
-const GroupDetailPage = lazy(() => import("./pages/GroupDetailPage").then((m) => ({ default: m.GroupDetailPage })));
-const GroupBookPage = lazy(() => import("./pages/GroupBookPage").then((m) => ({ default: m.GroupBookPage })));
 
 const AuthPage = lazy(() => import("./pages/AuthPage"));
 
@@ -43,13 +41,11 @@ function AppRoutes() {
         <Route path="/auth" element={isAuthenticated ? <Navigate to="/" replace /> : <AuthPage />} />
         <Route path="/" element={<ProtectedRoute><LibraryPage /></ProtectedRoute>} />
         <Route path="/books/:id" element={<ProtectedRoute><BookDetailPage /></ProtectedRoute>} />
+        <Route path="/books/:ebookId/schedule" element={<ProtectedRoute><RecommendationPage /></ProtectedRoute>} />
         <Route path="/read/:id" element={<ProtectedRoute><ReadingPage /></ProtectedRoute>} />
         <Route path="/reader/:id" element={<ProtectedRoute><ReaderRedirect /></ProtectedRoute>} />
         <Route path="/add" element={<ProtectedRoute><AddBookPage /></ProtectedRoute>} />
         <Route path="/settings" element={<ProtectedRoute><SettingsPage /></ProtectedRoute>} />
-        <Route path="/groups" element={<ProtectedRoute><GroupsPage /></ProtectedRoute>} />
-        <Route path="/groups/:groupId" element={<ProtectedRoute><GroupDetailPage /></ProtectedRoute>} />
-        <Route path="/groups/:groupId/books/:bookId" element={<ProtectedRoute><GroupBookPage /></ProtectedRoute>} />
         <Route path="/bookmarks-notes/:bookId?" element={<ProtectedRoute><BookmarksNotesPage /></ProtectedRoute>} />
         <Route path="*" element={<Navigate to="/" replace />} />
       </Routes>

frontend/src/api/books.ts

@@ -6,7 +6,9 @@ import type {
   ContentResponse,
   EBookDetail,
   EBookListItem,
+  GenerateRecommendationsRequest,
   ReadingProgress,
+  ReadingSchedule,
   ReadingSettings,
   TocResponse,
 } from "../types/book";
@@ -132,3 +134,64 @@ export const booksApi = {
     return data;
   },
 };
+
+export const schedulesApi = {
+  async getSchedules(): Promise<ReadingSchedule[]> {
+    const { data } = await api.get<ReadingSchedule[]>("/books/schedules/");
+    return data;
+  },
+
+  async getSchedule(id: number): Promise<ReadingSchedule> {
+    const { data } = await api.get<ReadingSchedule>(`/books/schedules/${id}/`);
+    return data;
+  },
+
+  async generateRecommendations(request: GenerateRecommendationsRequest): Promise<ReadingSchedule> {
+    const { data } = await api.post<ReadingSchedule>("/books/schedules/", {
+      ebook_id: request.ebook_id,
+      meeting_count: request.meeting_count ?? 4,
+    });
+    return data;
+  },
+
+  async regenerateRecommendations(scheduleId: number, meetingCount?: number): Promise<ReadingSchedule> {
+    const { data } = await api.post<ReadingSchedule>(`/books/schedules/${scheduleId}/generate/`, {
+      meeting_count: meetingCount ?? 4,
+    });
+    return data;
+  },
+
+  async confirmSchedule(scheduleId: number): Promise<ReadingSchedule> {
+    const { data } = await api.post<ReadingSchedule>(`/books/schedules/${scheduleId}/confirm/`, {
+      confirm: true,
+    });
+    return data;
+  },
+
+  async updateMeeting(
+    scheduleId: number,
+    meetingId: number,
+    update: { chapter_ids?: number[]; title?: string; meeting_index?: number },
+  ): Promise<unknown> {
+    const { data } = await api.patch(
+      `/books/schedules/${scheduleId}/meetings/${meetingId}/`,
+      update,
+    );
+    return data;
+  },
+
+  async reorderMeetings(
+    scheduleId: number,
+    meetings: { id: number; meeting_index: number }[],
+  ): Promise<ReadingSchedule> {
+    const { data } = await api.patch<ReadingSchedule>(
+      `/books/schedules/${scheduleId}/reorder/`,
+      { meetings },
+    );
+    return data;
+  },
+
+  async deleteSchedule(id: number): Promise<void> {
+    await api.delete(`/books/schedules/${id}/`);
+  },
+};

frontend/src/api/groups.ts

@@ -1,151 +0,0 @@
-import api from "./client";
-import type {
-  AddMemberPayload,
-  AdjustSectionsPayload,
-  CreateGroupBookPayload,
-  CreateGroupPayload,
-  GroupBook,
-  GroupBookDetail,
-  MemberProgress,
-  ReadingGroup,
-  ReadingGroupDetail,
-  ReadingSchedule,
-  Section,
-} from "../types/group";
-
-export const groupsApi = {
-  // ---- Reading Groups ----
-
-  async listGroups(): Promise<ReadingGroup[]> {
-    const { data } = await api.get<{ count: number; results: ReadingGroup[] } | ReadingGroup[]>(
-      "/groups/"
-    );
-    if (Array.isArray(data)) return data;
-    return data.results ?? [];
-  },
-
-  async getGroup(id: number): Promise<ReadingGroupDetail> {
-    const { data } = await api.get<ReadingGroupDetail>(`/groups/${id}/`);
-    return data;
-  },
-
-  async createGroup(payload: CreateGroupPayload): Promise<ReadingGroup> {
-    const { data } = await api.post<ReadingGroup>("/groups/", payload);
-    return data;
-  },
-
-  async deleteGroup(id: number): Promise<void> {
-    await api.delete(`/groups/${id}/`);
-  },
-
-  async addMember(groupId: number, payload: AddMemberPayload): Promise<void> {
-    await api.post(`/groups/${groupId}/add_member/`, payload);
-  },
-
-  async removeMember(groupId: number, payload: AddMemberPayload): Promise<void> {
-    await api.post(`/groups/${groupId}/remove_member/`, payload);
-  },
-
-  // ---- Group Books ----
-
-  async listGroupBooks(groupId: number): Promise<GroupBook[]> {
-    const { data } = await api.get<GroupBook[]>(`/groups/${groupId}/books/`);
-    return Array.isArray(data) ? data : (data as { results: GroupBook[] }).results ?? [];
-  },
-
-  async getGroupBook(groupId: number, bookId: number): Promise<GroupBookDetail> {
-    const { data } = await api.get<GroupBookDetail>(`/groups/${groupId}/books/${bookId}/`);
-    return data;
-  },
-
-  async createGroupBook(
-    groupId: number,
-    payload: CreateGroupBookPayload
-  ): Promise<GroupBookDetail> {
-    const { data } = await api.post<GroupBookDetail>(
-      `/groups/${groupId}/books/`,
-      payload
-    );
-    return data;
-  },
-
-  async deleteGroupBook(groupId: number, bookId: number): Promise<void> {
-    await api.delete(`/groups/${groupId}/books/${bookId}/`);
-  },
-
-  // ---- Sections ----
-
-  async detectSections(
-    groupId: number,
-    bookId: number
-  ): Promise<Section[]> {
-    const { data } = await api.post<Section[]>(
-      `/groups/${groupId}/books/${bookId}/detect-sections/`
-    );
-    return data;
-  },
-
-  async adjustSections(
-    groupId: number,
-    bookId: number,
-    payload: AdjustSectionsPayload
-  ): Promise<Section | Section[]> {
-    const { data } = await api.post<Section | Section[]>(
-      `/groups/${groupId}/books/${bookId}/adjust-sections/`,
-      payload
-    );
-    return data;
-  },
-
-  // ---- Schedule ----
-
-  async getSchedule(
-    groupId: number,
-    bookId: number
-  ): Promise<ReadingSchedule[]> {
-    const { data } = await api.get<ReadingSchedule[]>(
-      `/groups/${groupId}/books/${bookId}/schedule/`
-    );
-    return data;
-  },
-
-  async generateSchedule(
-    groupId: number,
-    bookId: number,
-    numMeetings: number = 4
-  ): Promise<ReadingSchedule[]> {
-    const { data } = await api.post<ReadingSchedule[]>(
-      `/groups/${groupId}/books/${bookId}/schedule/`,
-      { num_meetings: numMeetings }
-    );
-    return data;
-  },
-
-  async deleteSchedule(groupId: number, bookId: number): Promise<void> {
-    await api.delete(`/groups/${groupId}/books/${bookId}/schedule/`);
-  },
-
-  // ---- Progress ----
-
-  async getProgress(
-    groupId: number,
-    bookId: number
-  ): Promise<MemberProgress[]> {
-    const { data } = await api.get<MemberProgress[]>(
-      `/groups/${groupId}/books/${bookId}/progress/`
-    );
-    return data;
-  },
-
-  async updateProgress(
-    groupId: number,
-    bookId: number,
-    payload: { current_section?: number; completed_sections?: number[] }
-  ): Promise<MemberProgress> {
-    const { data } = await api.patch<MemberProgress>(
-      `/groups/${groupId}/books/${bookId}/progress/`,
-      payload
-    );
-    return data;
-  },
-};

frontend/src/components/BookContextMenu.tsx

@@ -1,4 +1,5 @@
 import { useEffect, useLayoutEffect, useRef, useState } from "react";
+import { useNavigate } from "react-router-dom";
 import { useTranslation } from "react-i18n-lite";
 import { booksApi } from "../api/books";
 import { getApiErrorMessage } from "../api/errors";
@@ -46,6 +47,7 @@ export function BookContextMenu({
   const { t, language } = useTranslation();
   const locale = language as SupportedLanguage;
   const { showToast } = useToast();
+  const navigate = useNavigate();
   const menuRef = useRef<HTMLDivElement>(null);
   const [position, setPosition] = useState({ left: x, top: y });
   const [activeAction, setActiveAction] = useState<ActionKind>(null);
@@ -148,6 +150,18 @@ export function BookContextMenu({
       >
         {activeAction === "sync" ? t("contextMenu.syncingMetadata") : t("contextMenu.syncMetadata")}
       </button>
+      <button
+        type="button"
+        className={styles.item}
+        role="menuitem"
+        disabled={busy}
+        onClick={() => {
+          navigate(`/books/${book.id}/schedule`);
+          onClose();
+        }}
+      >
+        📅 Schedule Reading
+      </button>
       <div className={styles.separator} role="separator" />
       <button
         type="button"

frontend/src/locales/en-US.ts

@@ -245,54 +245,6 @@ const enUS = {
     home: "Home",
     bookmarksNotes: "Bookmarks & Notes",
   },
-  groups: {
-    title: "Reading Groups",
-    createGroup: "Create Group",
-    create: "Create",
-    cancel: "Cancel",
-    groupName: "Group Name",
-    groupNamePlaceholder: "Enter group name",
-    description: "Description",
-    descriptionPlaceholder: "What is this group about?",
-    optional: "Optional",
-    noGroups: "No groups yet",
-    noGroupsHint: "Create a reading group to start reading together!",
-    members: "Members",
-    admin: "Admin",
-    addMember: "Add Member",
-    memberIdPlaceholder: "Enter user ID",
-    add: "Add",
-    remove: "Remove",
-    books: "Group Books",
-    uploadEpub: "Upload EPUB",
-    selectEbook: "Select an EPUB to share with the group",
-    noEpubBooks: "No EPUB files uploaded yet",
-    uploadFirst: "Upload an EPUB first",
-    confirmUpload: "Confirm Upload",
-    noBooks: "No books in this group yet",
-    sections: "Sections",
-    schedule: "Schedule",
-    progress: "Progress",
-    detectSections: "Auto-Detect Sections",
-    mergeSections: "Merge Sections",
-    selectSectionsHint: "Click sections to select for merging",
-    merge: "Merge",
-    clear: "Clear",
-    split: "Split",
-    splitInto: "Split into",
-    parts: "parts",
-    splitBtn: "Split",
-    noSections: "No sections detected yet",
-    noSectionsHint: 'Click "Auto-Detect Sections" to parse the EPUB chapters into reading sections.',
-    readingSchedule: "Reading Schedule",
-    generateSchedule: "Generate Schedule",
-    noSchedule: "No schedule generated yet",
-    noScheduleHint: "Detect sections first, then generate a reading schedule for your group.",
-    meeting: "Meeting",
-    memberProgress: "Member Progress",
-    noProgress: "No progress data yet",
-    noProgressHint: "Members will show progress once they start reading.",
-  },
 } as const;
 
 export default enUS;

frontend/src/locales/es-ES.ts

@@ -247,54 +247,6 @@ const esES: Locale = {
     home: "Inicio",
     bookmarksNotes: "Marcadores y notas",
   },
-  groups: {
-    title: "Grupos de Lectura",
-    createGroup: "Crear Grupo",
-    create: "Crear",
-    cancel: "Cancelar",
-    groupName: "Nombre del Grupo",
-    groupNamePlaceholder: "Ingresa el nombre del grupo",
-    description: "Descripción",
-    descriptionPlaceholder: "¿De qué trata este grupo?",
-    optional: "Opcional",
-    noGroups: "Aún no hay grupos",
-    noGroupsHint: "¡Crea un grupo de lectura para leer juntos!",
-    members: "Miembros",
-    admin: "Admin",
-    addMember: "Agregar Miembro",
-    memberIdPlaceholder: "Ingresa ID de usuario",
-    add: "Agregar",
-    remove: "Eliminar",
-    books: "Libros del Grupo",
-    uploadEpub: "Subir EPUB",
-    selectEbook: "Selecciona un EPUB para compartir con el grupo",
-    noEpubBooks: "No hay archivos EPUB subidos aún",
-    uploadFirst: "Sube un EPUB primero",
-    confirmUpload: "Confirmar Subida",
-    noBooks: "No hay libros en este grupo aún",
-    sections: "Secciones",
-    schedule: "Calendario",
-    progress: "Progreso",
-    detectSections: "Auto-Detectar Secciones",
-    mergeSections: "Fusionar Secciones",
-    selectSectionsHint: "Haz clic en las secciones para seleccionar y fusionar",
-    merge: "Fusionar",
-    clear: "Limpiar",
-    split: "Dividir",
-    splitInto: "Dividir en",
-    parts: "partes",
-    splitBtn: "Dividir",
-    noSections: "No se detectaron secciones",
-    noSectionsHint: 'Haz clic en "Auto-Detectar Secciones" para analizar los capítulos del EPUB.',
-    readingSchedule: "Calendario de Lectura",
-    generateSchedule: "Generar Calendario",
-    noSchedule: "No hay calendario generado",
-    noScheduleHint: "Detecta secciones primero, luego genera un calendario de lectura para tu grupo.",
-    meeting: "Reunión",
-    memberProgress: "Progreso de Miembros",
-    noProgress: "Sin datos de progreso",
-    noProgressHint: "Los miembros mostrarán progreso cuando comiencen a leer.",
-  },
 };
 
 export default esES;

frontend/src/pages/GroupBookPage.tsx

@@ -1,426 +0,0 @@
-import React, { useCallback, useEffect, useState } from "react";
-import { useNavigate, useParams } from "react-router-dom";
-import { useTranslation } from "react-i18n-lite";
-import { groupsApi } from "../api/groups";
-import { getApiErrorMessage } from "../api/errors";
-import type {
-  GroupBookDetail,
-  ReadingSchedule,
-  Section,
-  MemberProgress,
-} from "../types/group";
-
-export function GroupBookPage() {
-  const { t } = useTranslation();
-  const navigate = useNavigate();
-  const { groupId, bookId } = useParams<{ groupId: string; bookId: string }>();
-
-  const [book, setBook] = useState<GroupBookDetail | null>(null);
-  const [sections, setSections] = useState<Section[]>([]);
-  const [schedules, setSchedules] = useState<ReadingSchedule[]>([]);
-  const [progress, setProgress] = useState<MemberProgress[]>([]);
-  const [loading, setLoading] = useState(true);
-  const [error, setError] = useState<string | null>(null);
-  const [tab, setTab] = useState<"sections" | "schedule" | "progress">("sections");
-
-  // Merge state
-  const [selectedForMerge, setSelectedForMerge] = useState<number[]>([]);
-  const [splitSectionId, setSplitSectionId] = useState<number | null>(null);
-  const [splitAt, setSplitAt] = useState(2);
-
-  const gId = Number(groupId);
-  const bId = Number(bookId);
-
-  const loadData = useCallback(async () => {
-    if (!gId || !bId) return;
-    setLoading(true);
-    try {
-      const [bookData, schedData, progData] = await Promise.all([
-        groupsApi.getGroupBook(gId, bId),
-        groupsApi.getSchedule(gId, bId).catch(() => [] as ReadingSchedule[]),
-        groupsApi.getProgress(gId, bId).catch(() => [] as MemberProgress[]),
-      ]);
-      setBook(bookData);
-      setSections(bookData.sections ?? []);
-      setSchedules(schedData);
-      setProgress(progData);
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to load book"));
-    } finally {
-      setLoading(false);
-    }
-  }, [gId, bId]);
-
-  useEffect(() => {
-    loadData();
-  }, [loadData]);
-
-  const handleDetectSections = async () => {
-    if (!gId || !bId) return;
-    try {
-      const newSections = await groupsApi.detectSections(gId, bId);
-      setSections(newSections);
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to detect sections"));
-    }
-  };
-
-  const handleMerge = async () => {
-    if (selectedForMerge.length < 2 || !gId || !bId) return;
-    try {
-      await groupsApi.adjustSections(gId, bId, {
-        operation: "merge",
-        section_ids: selectedForMerge,
-      });
-      setSelectedForMerge([]);
-      await loadData();
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to merge sections"));
-    }
-  };
-
-  const handleSplit = async () => {
-    if (!splitSectionId || !gId || !bId) return;
-    try {
-      await groupsApi.adjustSections(gId, bId, {
-        operation: "split",
-        section_ids: [splitSectionId],
-        split_at: splitAt,
-      });
-      setSplitSectionId(null);
-      await loadData();
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to split section"));
-    }
-  };
-
-  const handleGenerateSchedule = async () => {
-    if (!gId || !bId) return;
-    try {
-      const newSched = await groupsApi.generateSchedule(gId, bId, 4);
-      setSchedules(newSched);
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to generate schedule"));
-    }
-  };
-
-  const toggleMergeSelect = (id: number) => {
-    setSelectedForMerge((prev) =>
-      prev.includes(id) ? prev.filter((s) => s !== id) : [...prev, id]
-    );
-  };
-
-  const formatMinutes = (mins: number): string => {
-    if (mins < 60) return `${mins}m`;
-    const h = Math.floor(mins / 60);
-    const m = mins % 60;
-    return m > 0 ? `${h}h ${m}m` : `${h}h`;
-  };
-
-  if (loading) {
-    return (
-      <div style={{ maxWidth: 800, margin: "0 auto", padding: 16, minHeight: "100vh", background: "#f8f9fa" }}>
-        <p style={{ textAlign: "center", color: "#888", padding: 40 }}>{t("common.loading")}</p>
-      </div>
-    );
-  }
-
-  if (!book) {
-    return (
-      <div style={{ maxWidth: 800, margin: "0 auto", padding: 16, minHeight: "100vh", background: "#f8f9fa" }}>
-        <p style={{ textAlign: "center", color: "#e74c3c", padding: 40 }}>Book not found</p>
-        <button onClick={() => navigate(`/groups/${groupId}`)} style={{ display: "block", margin: "0 auto" }}>← Back</button>
-      </div>
-    );
-  }
-
-  return (
-    <div style={{ maxWidth: 800, margin: "0 auto", padding: 16, minHeight: "100vh", background: "#f8f9fa" }}>
-      {/* Header */}
-      <header style={{ display: "flex", justifyContent: "space-between", alignItems: "center", padding: "16px 0", borderBottom: "1px solid #eee", marginBottom: 20 }}>
-        <div>
-          <h1 style={{ fontSize: 24, fontWeight: 700, color: "#1a1a2e", margin: 0 }}>{book.title}</h1>
-          <p style={{ margin: 4, fontSize: 13, color: "#888" }}>
-            {book.ebook.author && `by ${book.ebook.author} · `}
-            {book.ebook.page_count} chapters · {book.ebook.format.toUpperCase()}
-          </p>
-        </div>
-        <button onClick={() => navigate(`/groups/${groupId}`)} style={{ padding: "8px 16px", borderRadius: 6, border: "1px solid #ddd", background: "#fff", cursor: "pointer", fontSize: 14 }}>
-          ← {t("common.back")}
-        </button>
-      </header>
-
-      {error && (
-        <div style={{ background: "#fde8e8", padding: 12, borderRadius: 6, color: "#e74c3c", fontSize: 14, marginBottom: 16 }}>
-          {error}
-          <button onClick={() => setError(null)} style={{ marginLeft: 12, background: "none", border: "none", cursor: "pointer", fontWeight: 600 }}>✕</button>
-        </div>
-      )}
-
-      {/* Tabs */}
-      <div style={{ display: "flex", gap: 4, marginBottom: 20, background: "#eee", borderRadius: 8, padding: 4 }}>
-        {(["sections", "schedule", "progress"] as const).map((t) => (
-          <button
-            key={t}
-            onClick={() => setTab(t)}
-            style={{
-              flex: 1, padding: "10px 16px", borderRadius: 6, border: "none",
-              fontSize: 14, fontWeight: 600, cursor: "pointer",
-              background: tab === t ? "#fff" : "transparent",
-              color: tab === t ? "#1a1a2e" : "#888",
-              boxShadow: tab === t ? "0 1px 4px rgba(0,0,0,0.1)" : "none",
-            }}
-          >
-            {t === "sections" ? t("groups.sections") : t === "schedule" ? t("groups.schedule") : t("groups.progress")}
-          </button>
-        ))}
-      </div>
-
-      {/* Sections Tab */}
-      {tab === "sections" && (
-        <section>
-          <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center", marginBottom: 16 }}>
-            <h2 style={{ fontSize: 18, fontWeight: 600, color: "#1a1a2e", margin: 0 }}>
-              {sections.length} {t("groups.sections")}
-            </h2>
-            <div style={{ display: "flex", gap: 8 }}>
-              <button
-                onClick={handleDetectSections}
-                style={{ padding: "8px 16px", borderRadius: 6, border: "none", background: "#1a1a2e", color: "#fff", fontSize: 13, fontWeight: 600, cursor: "pointer" }}
-              >
-                {t("groups.detectSections")}
-              </button>
-            </div>
-          </div>
-
-          {/* Merge controls */}
-          <div style={{ background: "#fff", padding: 16, borderRadius: 10, marginBottom: 12, boxShadow: "0 1px 4px rgba(0,0,0,0.06)" }}>
-            <div style={{ display: "flex", alignItems: "center", gap: 10, flexWrap: "wrap" }}>
-              <span style={{ fontSize: 14, fontWeight: 600, color: "#555" }}>{t("groups.mergeSections")}:</span>
-              <span style={{ fontSize: 13, color: "#888" }}>
-                {selectedForMerge.length === 0
-                  ? t("groups.selectSectionsHint")
-                  : `${selectedForMerge.length} selected`}
-              </span>
-              {selectedForMerge.length >= 2 && (
-                <button
-                  onClick={handleMerge}
-                  style={{ padding: "6px 14px", borderRadius: 6, border: "none", background: "#27ae60", color: "#fff", fontSize: 13, fontWeight: 600, cursor: "pointer" }}
-                >
-                  {t("groups.merge")}
-                </button>
-              )}
-              {selectedForMerge.length > 0 && (
-                <button
-                  onClick={() => setSelectedForMerge([])}
-                  style={{ padding: "6px 12px", borderRadius: 6, border: "1px solid #ddd", background: "#fff", fontSize: 13, cursor: "pointer" }}
-                >
-                  {t("groups.clear")}
-                </button>
-              )}
-            </div>
-          </div>
-
-          {sections.length === 0 ? (
-            <div style={{ textAlign: "center", padding: 40, color: "#888" }}>
-              <p style={{ fontSize: 16 }}>{t("groups.noSections")}</p>
-              <p style={{ fontSize: 14 }}>{t("groups.noSectionsHint")}</p>
-            </div>
-          ) : (
-            <div style={{ display: "flex", flexDirection: "column", gap: 10 }}>
-              {sections.map((section) => (
-                <div
-                  key={section.id}
-                  style={{
-                    background: selectedForMerge.includes(section.id) ? "#e8f0fe" : "#fff",
-                    border: selectedForMerge.includes(section.id) ? "2px solid #1a1a2e" : "1px solid #eee",
-                    padding: 16, borderRadius: 10, cursor: "pointer",
-                    boxShadow: "0 1px 4px rgba(0,0,0,0.06)",
-                    transition: "all 0.15s",
-                  }}
-                  onClick={() => toggleMergeSelect(section.id)}
-                >
-                  <div style={{ display: "flex", justifyContent: "space-between", alignItems: "flex-start" }}>
-                    <div style={{ flex: 1 }}>
-                      <div style={{ display: "flex", alignItems: "center", gap: 8 }}>
-                        <span style={{
-                          background: "#1a1a2e", color: "#fff", borderRadius: 20,
-                          width: 26, height: 26, display: "flex", alignItems: "center", justifyContent: "center",
-                          fontSize: 13, fontWeight: 700, flexShrink: 0,
-                        }}>
-                          {section.order}
-                        </span>
-                        <h3 style={{ margin: 0, fontSize: 15, fontWeight: 600, color: "#1a1a2e" }}>{section.title}</h3>
-                      </div>
-                      <p style={{ margin: "6px 0 0 34px", fontSize: 13, color: "#888" }}>
-                        Ch. {section.start_chapter_index}–{section.end_chapter_index - 1} · ~{formatMinutes(section.estimated_reading_minutes)} reading time
-                      </p>
-                    </div>
-                    <button
-                      onClick={(e) => {
-                        e.stopPropagation();
-                        setSplitSectionId(splitSectionId === section.id ? null : section.id);
-                      }}
-                      style={{
-                        padding: "4px 10px", borderRadius: 4, border: "1px solid #ddd",
-                        background: splitSectionId === section.id ? "#1a1a2e" : "#fff",
-                        color: splitSectionId === section.id ? "#fff" : "#666",
-                        fontSize: 12, cursor: "pointer", flexShrink: 0,
-                      }}
-                    >
-                      {t("groups.split")}
-                    </button>
-                  </div>
-                  {splitSectionId === section.id && (
-                    <div
-                      style={{ marginTop: 10, padding: 10, background: "#f8f9fa", borderRadius: 6, display: "flex", alignItems: "center", gap: 8 }}
-                      onClick={(e) => e.stopPropagation()}
-                    >
-                      <span style={{ fontSize: 13 }}>{t("groups.splitInto")}</span>
-                      <input
-                        type="number"
-                        value={splitAt}
-                        min={2}
-                        max={10}
-                        onChange={(e) => setSplitAt(Number(e.target.value))}
-                        style={{ width: 50, padding: "4px 8px", borderRadius: 4, border: "1px solid #ddd", fontSize: 13, textAlign: "center" }}
-                      />
-                      <span style={{ fontSize: 13 }}>{t("groups.parts")}</span>
-                      <button
-                        onClick={handleSplit}
-                        style={{ padding: "4px 12px", borderRadius: 4, border: "none", background: "#1a1a2e", color: "#fff", fontSize: 12, cursor: "pointer" }}
-                      >
-                        {t("groups.splitBtn")}
-                      </button>
-                    </div>
-                  )}
-                </div>
-              ))}
-            </div>
-          )}
-        </section>
-      )}
-
-      {/* Schedule Tab */}
-      {tab === "schedule" && (
-        <section>
-          <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center", marginBottom: 16 }}>
-            <h2 style={{ fontSize: 18, fontWeight: 600, color: "#1a1a2e", margin: 0 }}>
-              {t("groups.readingSchedule")}
-            </h2>
-            <button
-              onClick={handleGenerateSchedule}
-              style={{ padding: "8px 16px", borderRadius: 6, border: "none", background: "#1a1a2e", color: "#fff", fontSize: 13, fontWeight: 600, cursor: "pointer" }}
-            >
-              {t("groups.generateSchedule")}
-            </button>
-          </div>
-
-          {schedules.length === 0 ? (
-            <div style={{ textAlign: "center", padding: 40, color: "#888" }}>
-              <p style={{ fontSize: 16 }}>{t("groups.noSchedule")}</p>
-              <p style={{ fontSize: 14 }}>{t("groups.noScheduleHint")}</p>
-            </div>
-          ) : (
-            <div style={{ display: "flex", flexDirection: "column", gap: 16 }}>
-              {schedules.map((s) => (
-                <div
-                  key={s.id}
-                  style={{ background: "#fff", padding: 20, borderRadius: 12, boxShadow: "0 2px 8px rgba(0,0,0,0.06)" }}
-                >
-                  <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center", marginBottom: 12 }}>
-                    <div>
-                      <h3 style={{ margin: 0, fontSize: 17, fontWeight: 700, color: "#1a1a2e" }}>
-                        {t("groups.meeting")} {s.meeting_number}
-                      </h3>
-                      <p style={{ margin: "4px 0 0", fontSize: 13, color: "#888" }}>
-                        Week of {new Date(s.week_date).toLocaleDateString("en-US", { month: "long", day: "numeric", year: "numeric" })}
-                      </p>
-                    </div>
-                    <span style={{
-                      background: "#f0f0f0", padding: "6px 12px", borderRadius: 20,
-                      fontSize: 13, fontWeight: 600, color: "#555",
-                    }}>
-                      {s.section_details.reduce((sum, sec) => sum + sec.estimated_reading_minutes, 0) > 0
-                        ? `~${formatMinutes(s.section_details.reduce((sum, sec) => sum + sec.estimated_reading_minutes, 0))}`
-                        : ""}
-                    </span>
-                  </div>
-                  <div style={{ display: "flex", flexDirection: "column", gap: 6 }}>
-                    {s.section_details.map((sec) => (
-                      <div
-                        key={sec.id}
-                        style={{
-                          display: "flex", alignItems: "center", gap: 10, padding: "8px 12px",
-                          background: "#f8f9fa", borderRadius: 6, fontSize: 14,
-                        }}
-                      >
-                        <span style={{
-                          background: "#1a1a2e", color: "#fff", borderRadius: 12,
-                          width: 22, height: 22, display: "flex", alignItems: "center", justifyContent: "center",
-                          fontSize: 11, fontWeight: 700, flexShrink: 0,
-                        }}>
-                          {sec.order}
-                        </span>
-                        <span style={{ flex: 1 }}>{sec.title}</span>
-                        <span style={{ fontSize: 12, color: "#999" }}>{formatMinutes(sec.estimated_reading_minutes)}</span>
-                      </div>
-                    ))}
-                  </div>
-                </div>
-              ))}
-            </div>
-          )}
-        </section>
-      )}
-
-      {/* Progress Tab */}
-      {tab === "progress" && (
-        <section>
-          <h2 style={{ fontSize: 18, fontWeight: 600, color: "#1a1a2e", margin: "0 0 16px" }}>
-            {t("groups.memberProgress")}
-          </h2>
-          {progress.length === 0 ? (
-            <div style={{ textAlign: "center", padding: 40, color: "#888" }}>
-              <p style={{ fontSize: 16 }}>{t("groups.noProgress")}</p>
-              <p style={{ fontSize: 14 }}>{t("groups.noProgressHint")}</p>
-            </div>
-          ) : (
-            <div style={{ display: "flex", flexDirection: "column", gap: 10 }}>
-              {progress.map((p) => {
-                const totalSections = sections.length;
-                const completed = p.completed_sections.length;
-                const pct = totalSections > 0 ? Math.round((completed / totalSections) * 100) : 0;
-                return (
-                  <div
-                    key={p.id}
-                    style={{ background: "#fff", padding: 16, borderRadius: 10, boxShadow: "0 1px 4px rgba(0,0,0,0.06)" }}
-                  >
-                    <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center", marginBottom: 8 }}>
-                      <span style={{ fontSize: 15, fontWeight: 600 }}>{p.user_email}</span>
-                      <span style={{ fontSize: 13, color: "#888" }}>{completed}/{totalSections} · {pct}%</span>
-                    </div>
-                    <div style={{ height: 6, background: "#eee", borderRadius: 3, overflow: "hidden" }}>
-                      <div
-                        style={{
-                          height: "100%", borderRadius: 3,
-                          background: "linear-gradient(90deg, #27ae60, #2ecc71)",
-                          width: `${pct}%`, transition: "width 0.3s",
-                        }}
-                      />
-                    </div>
-                    {p.current_section_title && (
-                      <p style={{ margin: "8px 0 0", fontSize: 13, color: "#888" }}>
-                        Currently: {p.current_section_title}
-                      </p>
-                    )}
-                  </div>
-                );
-              })}
-            </div>
-          )}
-        </section>
-      )}
-    </div>
-  );
-}

frontend/src/pages/GroupDetailPage.tsx

@@ -1,300 +0,0 @@
-import React, { useCallback, useEffect, useState } from "react";
-import { useNavigate, useParams } from "react-router-dom";
-import { useTranslation } from "react-i18n-lite";
-import { groupsApi } from "../api/groups";
-import { booksApi } from "../api/books";
-import { getApiErrorMessage } from "../api/errors";
-import type { ReadingGroupDetail, GroupBook, GroupBookDetail } from "../types/group";
-import type { EBookListItem } from "../types/book";
-
-export function GroupDetailPage() {
-  const { t } = useTranslation();
-  const navigate = useNavigate();
-  const { groupId } = useParams<{ groupId: string }>();
-  const [group, setGroup] = useState<ReadingGroupDetail | null>(null);
-  const [books, setBooks] = useState<GroupBook[]>([]);
-  const [loading, setLoading] = useState(true);
-  const [error, setError] = useState<string | null>(null);
-
-  // Upload state
-  const [showUpload, setShowUpload] = useState(false);
-  const [ebooks, setEbooks] = useState<EBookListItem[]>([]);
-  const [selectedEbookId, setSelectedEbookId] = useState<number | null>(null);
-  const [uploading, setUploading] = useState(false);
-
-  // Add member state
-  const [showAddMember, setShowAddMember] = useState(false);
-  const [memberEmail, setMemberEmail] = useState("");
-  const [adding, setAdding] = useState(false);
-
-  const id = Number(groupId);
-
-  const loadData = useCallback(async () => {
-    if (!id) return;
-    setLoading(true);
-    try {
-      const [groupData, bookData] = await Promise.all([
-        groupsApi.getGroup(id),
-        groupsApi.listGroupBooks(id),
-      ]);
-      setGroup(groupData);
-      setBooks(bookData);
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to load group"));
-    } finally {
-      setLoading(false);
-    }
-  }, [id]);
-
-  useEffect(() => {
-    loadData();
-  }, [loadData]);
-
-  const handleUploadClick = async () => {
-    setShowUpload(true);
-    try {
-      const ebookList = await booksApi.getEBooks();
-      setEbooks(ebookList.filter((e) => e.format === "epub"));
-    } catch {
-      // Ebook list fetch failed silently
-    }
-  };
-
-  const handleUpload = async () => {
-    if (!selectedEbookId || !id) return;
-    setUploading(true);
-    try {
-      const created = await groupsApi.createGroupBook(id, { ebook_id: selectedEbookId });
-      setShowUpload(false);
-      setSelectedEbookId(null);
-      await loadData();
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to upload book to group"));
-    } finally {
-      setUploading(false);
-    }
-  };
-
-  const handleAddMember = async (e: React.FormEvent) => {
-    e.preventDefault();
-    if (!memberEmail.trim() || !id) return;
-    setAdding(true);
-    try {
-      // Note: In a real implementation, we'd look up user by email.
-      // For now this requires user_id. Email lookup would be an enhancement.
-      await groupsApi.addMember(id, { user_id: Number(memberEmail) });
-      setShowAddMember(false);
-      setMemberEmail("");
-      await loadData();
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to add member. Please use a valid user ID."));
-    } finally {
-      setAdding(false);
-    }
-  };
-
-  const handleRemoveMember = async (userId: number) => {
-    if (!id) return;
-    try {
-      await groupsApi.removeMember(id, { user_id: userId });
-      await loadData();
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to remove member"));
-    }
-  };
-
-  if (loading) {
-    return (
-      <div style={{ maxWidth: 700, margin: "0 auto", padding: 16, minHeight: "100vh", background: "#f8f9fa" }}>
-        <p style={{ textAlign: "center", color: "#888", padding: 40 }}>{t("common.loading")}</p>
-      </div>
-    );
-  }
-
-  if (!group) {
-    return (
-      <div style={{ maxWidth: 700, margin: "0 auto", padding: 16, minHeight: "100vh", background: "#f8f9fa" }}>
-        <p style={{ textAlign: "center", color: "#e74c3c", padding: 40 }}>Group not found</p>
-        <button onClick={() => navigate("/groups")} style={{ display: "block", margin: "0 auto" }}>← Back to Groups</button>
-      </div>
-    );
-  }
-
-  return (
-    <div style={{ maxWidth: 700, margin: "0 auto", padding: 16, minHeight: "100vh", background: "#f8f9fa" }}>
-      <header style={{ display: "flex", justifyContent: "space-between", alignItems: "center", padding: "16px 0", borderBottom: "1px solid #eee", marginBottom: 20 }}>
-        <div>
-          <h1 style={{ fontSize: 24, fontWeight: 700, color: "#1a1a2e", margin: 0 }}>{group.name}</h1>
-          {group.description && <p style={{ margin: "4px 0 0", fontSize: 14, color: "#666" }}>{group.description}</p>}
-        </div>
-        <button onClick={() => navigate("/groups")} style={{ padding: "8px 16px", borderRadius: 6, border: "1px solid #ddd", background: "#fff", cursor: "pointer", fontSize: 14 }}>
-          ← {t("common.back")}
-        </button>
-      </header>
-
-      {error && (
-        <div style={{ background: "#fde8e8", padding: 12, borderRadius: 6, color: "#e74c3c", fontSize: 14, marginBottom: 16 }}>
-          {error}
-          <button onClick={() => setError(null)} style={{ marginLeft: 12, background: "none", border: "none", cursor: "pointer", fontWeight: 600 }}>✕</button>
-        </div>
-      )}
-
-      {/* Members Section */}
-      <section style={{ background: "#fff", padding: 20, borderRadius: 12, marginBottom: 20, boxShadow: "0 2px 8px rgba(0,0,0,0.06)" }}>
-        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center", marginBottom: 12 }}>
-          <h2 style={{ fontSize: 18, fontWeight: 600, color: "#1a1a2e", margin: 0 }}>{t("groups.members")} ({group.members.length})</h2>
-          <button
-            onClick={() => setShowAddMember(!showAddMember)}
-            style={{ padding: "6px 14px", borderRadius: 6, border: "1px solid #ddd", background: "#fff", cursor: "pointer", fontSize: 13 }}
-          >
-            {showAddMember ? t("groups.cancel") : `+ ${t("groups.addMember")}`}
-          </button>
-        </div>
-        {showAddMember && (
-          <form onSubmit={handleAddMember} style={{ display: "flex", gap: 8, marginBottom: 12 }}>
-            <input
-              type="text"
-              value={memberEmail}
-              onChange={(e) => setMemberEmail(e.target.value)}
-              placeholder={t("groups.memberIdPlaceholder")}
-              style={{ flex: 1, padding: "8px 12px", borderRadius: 6, border: "1px solid #ddd", fontSize: 14, outline: "none" }}
-            />
-            <button
-              type="submit"
-              disabled={adding}
-              style={{ padding: "8px 16px", borderRadius: 6, border: "none", background: "#1a1a2e", color: "#fff", fontSize: 14, cursor: "pointer", opacity: adding ? 0.6 : 1 }}
-            >
-              {t("groups.add")}
-            </button>
-          </form>
-        )}
-        <div style={{ display: "flex", flexDirection: "column", gap: 8 }}>
-          {group.members.map((m) => (
-            <div key={m.id} style={{ display: "flex", justifyContent: "space-between", alignItems: "center", padding: "8px 0", borderBottom: "1px solid #f0f0f0" }}>
-              <div>
-                <span style={{ fontSize: 14, fontWeight: 500 }}>{m.user_email}</span>
-                <span style={{ marginLeft: 8, fontSize: 12, color: m.role === "admin" ? "#e67e22" : "#999", background: m.role === "admin" ? "#fef3e2" : "#f0f0f0", padding: "2px 8px", borderRadius: 4 }}>
-                  {m.role}
-                </span>
-              </div>
-              {m.role !== "admin" && (
-                <button
-                  onClick={() => handleRemoveMember(m.user)}
-                  style={{ background: "none", border: "none", color: "#e74c3c", cursor: "pointer", fontSize: 13 }}
-                >
-                  {t("groups.remove")}
-                </button>
-              )}
-            </div>
-          ))}
-        </div>
-      </section>
-
-      {/* Books Section */}
-      <section style={{ background: "#fff", padding: 20, borderRadius: 12, boxShadow: "0 2px 8px rgba(0,0,0,0.06)" }}>
-        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center", marginBottom: 12 }}>
-          <h2 style={{ fontSize: 18, fontWeight: 600, color: "#1a1a2e", margin: 0 }}>{t("groups.books")} ({books.length})</h2>
-          <button
-            onClick={handleUploadClick}
-            style={{ padding: "8px 18px", borderRadius: 8, border: "none", background: "#1a1a2e", color: "#fff", fontSize: 14, fontWeight: 600, cursor: "pointer" }}
-          >
-            {t("groups.uploadEpub")}
-          </button>
-        </div>
-
-        {showUpload && (
-          <div style={{ background: "#f8f9fa", padding: 16, borderRadius: 8, marginBottom: 16 }}>
-            <h3 style={{ fontSize: 15, fontWeight: 600, margin: "0 0 12px" }}>{t("groups.selectEbook")}</h3>
-            {ebooks.length === 0 ? (
-              <div style={{ textAlign: "center", padding: 20, color: "#888" }}>
-                <p>{t("groups.noEpubBooks")}</p>
-                <button onClick={() => navigate("/add")} style={{ marginTop: 8, padding: "8px 16px", borderRadius: 6, border: "1px solid #ddd", background: "#fff", cursor: "pointer", fontSize: 13 }}>
-                  {t("groups.uploadFirst")}
-                </button>
-              </div>
-            ) : (
-              <div>
-                <div style={{ display: "flex", flexDirection: "column", gap: 8, marginBottom: 12, maxHeight: 200, overflowY: "auto" }}>
-                  {ebooks.map((eb) => (
-                    <label
-                      key={eb.id}
-                      style={{
-                        display: "flex", alignItems: "center", gap: 10, padding: "10px 12px",
-                        borderRadius: 8, cursor: "pointer", fontSize: 14,
-                        background: selectedEbookId === eb.id ? "#e8f0fe" : "#fff",
-                        border: selectedEbookId === eb.id ? "2px solid #1a1a2e" : "1px solid #eee",
-                      }}
-                    >
-                      <input
-                        type="radio"
-                        name="ebook"
-                        value={eb.id}
-                        checked={selectedEbookId === eb.id}
-                        onChange={() => setSelectedEbookId(eb.id)}
-                        style={{ accentColor: "#1a1a2e" }}
-                      />
-                      <div>
-                        <strong>{eb.title}</strong>
-                        {eb.author && <span style={{ color: "#888", marginLeft: 8 }}>by {eb.author}</span>}
-                        <span style={{ marginLeft: 8, fontSize: 12, color: "#aaa" }}>({eb.filename})</span>
-                      </div>
-                    </label>
-                  ))}
-                </div>
-                <div style={{ display: "flex", gap: 8 }}>
-                  <button
-                    onClick={handleUpload}
-                    disabled={!selectedEbookId || uploading}
-                    style={{ padding: "10px 20px", borderRadius: 8, border: "none", background: "#1a1a2e", color: "#fff", fontSize: 14, fontWeight: 600, cursor: uploading ? "default" : "pointer", opacity: uploading ? 0.6 : 1 }}
-                  >
-                    {uploading ? t("common.loading") : t("groups.confirmUpload")}
-                  </button>
-                  <button
-                    onClick={() => setShowUpload(false)}
-                    style={{ padding: "10px 20px", borderRadius: 8, border: "1px solid #ddd", background: "#fff", cursor: "pointer", fontSize: 14 }}
-                  >
-                    {t("groups.cancel")}
-                  </button>
-                </div>
-              </div>
-            )}
-          </div>
-        )}
-
-        {books.length === 0 ? (
-          <p style={{ textAlign: "center", color: "#888", padding: 30 }}>{t("groups.noBooks")}</p>
-        ) : (
-          <div style={{ display: "flex", flexDirection: "column", gap: 10 }}>
-            {books.map((book) => (
-              <div
-                key={book.id}
-                onClick={() => navigate(`/groups/${groupId}/books/${book.id}`)}
-                style={{
-                  display: "flex", justifyContent: "space-between", alignItems: "center",
-                  padding: 16, borderRadius: 10, cursor: "pointer", transition: "background 0.2s",
-                  background: book.status === "active" ? "#f0faf0" : "#fafafa",
-                  border: book.status === "active" ? "2px solid #27ae60" : "1px solid #eee",
-                }}
-                onMouseEnter={(e) => (e.currentTarget.style.background = book.status === "active" ? "#e8f5e9" : "#f5f5f5")}
-                onMouseLeave={(e) => (e.currentTarget.style.background = book.status === "active" ? "#f0faf0" : "#fafafa")}
-              >
-                <div>
-                  <h3 style={{ margin: 0, fontSize: 16, fontWeight: 600, color: "#1a1a2e" }}>
-                    {book.title}
-                    {book.status === "active" && (
-                      <span style={{ marginLeft: 8, fontSize: 11, color: "#27ae60", background: "#e8f5e9", padding: "2px 8px", borderRadius: 4 }}>Active</span>
-                    )}
-                  </h3>
-                  <p style={{ margin: "4px 0 0", fontSize: 13, color: "#888" }}>
-                    {book.section_count} sections · {book.ebook.page_count} chapters · uploaded by {book.uploaded_by_email}
-                  </p>
-                </div>
-                <span style={{ fontSize: 20, color: "#ccc" }}>→</span>
-              </div>
-            ))}
-          </div>
-        )}
-      </section>
-    </div>
-  );
-}

frontend/src/pages/GroupsPage.tsx

@@ -1,162 +0,0 @@
-import React, { useCallback, useEffect, useState } from "react";
-import { useNavigate } from "react-router-dom";
-import { useTranslation } from "react-i18n-lite";
-import { groupsApi } from "../api/groups";
-import { getApiErrorMessage } from "../api/errors";
-import type { ReadingGroup } from "../types/group";
-
-export function GroupsPage() {
-  const { t } = useTranslation();
-  const navigate = useNavigate();
-  const [groups, setGroups] = useState<ReadingGroup[]>([]);
-  const [loading, setLoading] = useState(true);
-  const [error, setError] = useState<string | null>(null);
-  const [showCreate, setShowCreate] = useState(false);
-  const [newName, setNewName] = useState("");
-  const [newDesc, setNewDesc] = useState("");
-  const [creating, setCreating] = useState(false);
-
-  const loadGroups = useCallback(async () => {
-    setLoading(true);
-    try {
-      const data = await groupsApi.listGroups();
-      setGroups(data);
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to load groups"));
-    } finally {
-      setLoading(false);
-    }
-  }, []);
-
-  useEffect(() => {
-    loadGroups();
-  }, [loadGroups]);
-
-  const handleCreate = async (e: React.FormEvent) => {
-    e.preventDefault();
-    if (!newName.trim()) return;
-    setCreating(true);
-    try {
-      await groupsApi.createGroup({ name: newName.trim(), description: newDesc.trim() });
-      setShowCreate(false);
-      setNewName("");
-      setNewDesc("");
-      await loadGroups();
-    } catch (err) {
-      setError(getApiErrorMessage(err, "Failed to create group"));
-    } finally {
-      setCreating(false);
-    }
-  };
-
-  return (
-    <div style={{ maxWidth: 700, margin: "0 auto", padding: 16, minHeight: "100vh", background: "#f8f9fa" }}>
-      <header style={{ display: "flex", justifyContent: "space-between", alignItems: "center", padding: "16px 0", borderBottom: "1px solid #eee", marginBottom: 20 }}>
-        <h1 style={{ fontSize: 24, fontWeight: 700, color: "#1a1a2e", margin: 0 }}>{t("groups.title")}</h1>
-        <button
-          type="button"
-          onClick={() => navigate("/")}
-          style={{ padding: "8px 16px", borderRadius: 6, border: "1px solid #ddd", background: "#fff", cursor: "pointer", fontSize: 14 }}
-        >
-          ← {t("common.back")}
-        </button>
-      </header>
-
-      {error && (
-        <div style={{ background: "#fde8e8", padding: 12, borderRadius: 6, color: "#e74c3c", fontSize: 14, marginBottom: 16 }}>
-          {error}
-          <button onClick={() => setError(null)} style={{ marginLeft: 12, background: "none", border: "none", cursor: "pointer", fontWeight: 600 }}>✕</button>
-        </div>
-      )}
-
-      <div style={{ marginBottom: 20 }}>
-        <button
-          type="button"
-          onClick={() => setShowCreate(!showCreate)}
-          style={{
-            padding: "12px 24px", borderRadius: 8, border: "none",
-            background: "#1a1a2e", color: "#fff", fontSize: 15, fontWeight: 600, cursor: "pointer",
-          }}
-        >
-          {showCreate ? t("groups.cancel") : t("groups.createGroup")}
-        </button>
-      </div>
-
-      {showCreate && (
-        <form onSubmit={handleCreate} style={{
-          background: "#fff", padding: 20, borderRadius: 12, marginBottom: 24,
-          boxShadow: "0 2px 8px rgba(0,0,0,0.06)", display: "flex", flexDirection: "column", gap: 14,
-        }}>
-          <div style={{ display: "flex", flexDirection: "column", gap: 6 }}>
-            <label style={{ fontSize: 14, fontWeight: 600, color: "#555" }}>{t("groups.groupName")}</label>
-            <input
-              type="text"
-              value={newName}
-              onChange={(e) => setNewName(e.target.value)}
-              placeholder={t("groups.groupNamePlaceholder")}
-              style={{ padding: "10px 12px", borderRadius: 6, border: "1px solid #ddd", fontSize: 16, outline: "none" }}
-              required
-            />
-          </div>
-          <div style={{ display: "flex", flexDirection: "column", gap: 6 }}>
-            <label style={{ fontSize: 14, fontWeight: 600, color: "#555" }}>{t("groups.description")} ({t("common.optional")})</label>
-            <textarea
-              value={newDesc}
-              onChange={(e) => setNewDesc(e.target.value)}
-              placeholder={t("groups.descriptionPlaceholder")}
-              rows={3}
-              style={{ padding: "10px 12px", borderRadius: 6, border: "1px solid #ddd", fontSize: 15, outline: "none", resize: "vertical" }}
-            />
-          </div>
-          <button
-            type="submit"
-            disabled={creating || !newName.trim()}
-            style={{
-              padding: "10px 20px", borderRadius: 8, border: "none",
-              background: "#1a1a2e", color: "#fff", fontSize: 15, fontWeight: 600,
-              cursor: creating ? "default" : "pointer", opacity: creating ? 0.6 : 1, alignSelf: "flex-start",
-            }}
-          >
-            {creating ? t("common.loading") : t("groups.create")}
-          </button>
-        </form>
-      )}
-
-      {loading ? (
-        <p style={{ textAlign: "center", color: "#888", padding: 40 }}>{t("common.loading")}</p>
-      ) : groups.length === 0 ? (
-        <div style={{ textAlign: "center", padding: 40, color: "#888" }}>
-          <p style={{ fontSize: 16, marginBottom: 8 }}>{t("groups.noGroups")}</p>
-          <p style={{ fontSize: 14 }}>{t("groups.noGroupsHint")}</p>
-        </div>
-      ) : (
-        <div style={{ display: "flex", flexDirection: "column", gap: 12 }}>
-          {groups.map((group) => (
-            <div
-              key={group.id}
-              onClick={() => navigate(`/groups/${group.id}`)}
-              style={{
-                background: "#fff", padding: 20, borderRadius: 12, cursor: "pointer",
-                boxShadow: "0 2px 8px rgba(0,0,0,0.06)", transition: "box-shadow 0.2s",
-                display: "flex", justifyContent: "space-between", alignItems: "center",
-              }}
-              onMouseEnter={(e) => (e.currentTarget.style.boxShadow = "0 4px 16px rgba(0,0,0,0.1)")}
-              onMouseLeave={(e) => (e.currentTarget.style.boxShadow = "0 2px 8px rgba(0,0,0,0.06)")}
-            >
-              <div>
-                <h3 style={{ margin: 0, fontSize: 18, fontWeight: 600, color: "#1a1a2e" }}>{group.name}</h3>
-                {group.description && (
-                  <p style={{ margin: "6px 0 0", fontSize: 14, color: "#666" }}>{group.description}</p>
-                )}
-                <p style={{ margin: "8px 0 0", fontSize: 13, color: "#999" }}>
-                  {group.member_count} {t("groups.members")} · {t("groups.admin")}: {group.admin_email}
-                </p>
-              </div>
-              <span style={{ fontSize: 20, color: "#ccc" }}>→</span>
-            </div>
-          ))}
-        </div>
-      )}
-    </div>
-  );
-}

frontend/src/pages/RecommendationPage.tsx

@@ -0,0 +1,601 @@
+import React, { useCallback, useEffect, useState } from "react";
+import { useNavigate, useParams } from "react-router-dom";
+import { useTranslation } from "react-i18n-lite";
+import { schedulesApi } from "../api/books";
+import { booksApi } from "../api/books";
+import type {
+  BookChapter,
+  EBookListItem,
+  MeetingSection,
+  ReadingSchedule,
+} from "../types/book";
+import { useMediaQuery, BREAKPOINTS } from "../hooks/useMediaQuery";
+
+/* ---- drag-and-drop types ---- */
+interface DragData {
+  chapterId: number;
+  sourceMeetingId: number | null; // null = unassigned
+}
+
+function formatTime(minutes: number): string {
+  if (minutes < 60) return `${minutes} min`;
+  const h = Math.floor(minutes / 60);
+  const m = minutes % 60;
+  return m > 0 ? `${h}h ${m}m` : `${h}h`;
+}
+
+export function RecommendationPage() {
+  const { t } = useTranslation();
+  const { ebookId } = useParams<{ ebookId: string }>();
+  const navigate = useNavigate();
+  const isMobile = useMediaQuery(BREAKPOINTS.md);
+
+  const [ebook, setEbook] = useState<EBookListItem | null>(null);
+  const [schedule, setSchedule] = useState<ReadingSchedule | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [generating, setGenerating] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const [draggedChapter, setDraggedChapter] = useState<DragData | null>(null);
+  const [dropTarget, setDropTarget] = useState<number | null>(null);
+
+  const bookId = Number(ebookId);
+  const validId = !Number.isNaN(bookId);
+
+  const loadData = useCallback(async () => {
+    if (!validId) {
+      setError("Invalid ebook ID.");
+      setLoading(false);
+      return;
+    }
+    setLoading(true);
+    setError(null);
+    try {
+      const [ebookData, schedules] = await Promise.all([
+        booksApi.getEBook(bookId),
+        schedulesApi.getSchedules(),
+      ]);
+      setEbook({
+        id: ebookData.id,
+        title: ebookData.title,
+        author: ebookData.author,
+        filename: ebookData.filename,
+        format: ebookData.format,
+        page_count: ebookData.page_count,
+        cover_image:
+          typeof ebookData.cover_image === "string" ? ebookData.cover_image : null,
+        created_at: ebookData.created_at,
+        progress: ebookData.progress?.current_position ?? null,
+        started: ebookData.progress != null,
+      });
+      const existing = schedules.find((s) => s.ebook === bookId);
+      setSchedule(existing ?? null);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to load data.");
+    } finally {
+      setLoading(false);
+    }
+  }, [bookId, validId]);
+
+  useEffect(() => {
+    void loadData();
+  }, [loadData]);
+
+  const handleGenerate = useCallback(async () => {
+    if (!validId) return;
+    setGenerating(true);
+    setError(null);
+    try {
+      const newSchedule = await schedulesApi.generateRecommendations({
+        ebook_id: bookId,
+        meeting_count: 4,
+      });
+      setSchedule(newSchedule);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to generate recommendations.");
+    } finally {
+      setGenerating(false);
+    }
+  }, [bookId, validId]);
+
+  const handleRegenerate = useCallback(async () => {
+    if (!schedule) return;
+    setGenerating(true);
+    setError(null);
+    try {
+      const updated = await schedulesApi.regenerateRecommendations(schedule.id);
+      setSchedule(updated);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to regenerate recommendations.");
+    } finally {
+      setGenerating(false);
+    }
+  }, [schedule]);
+
+  const handleConfirm = useCallback(async () => {
+    if (!schedule) return;
+    setError(null);
+    try {
+      const updated = await schedulesApi.confirmSchedule(schedule.id);
+      setSchedule(updated);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to confirm schedule.");
+    }
+  }, [schedule]);
+
+  /* ---- drag-and-drop handlers ---- */
+  const handleDragStart = useCallback(
+    (chapterId: number, sourceMeetingId: number | null) => (e: React.DragEvent) => {
+      setDraggedChapter({ chapterId, sourceMeetingId });
+      e.dataTransfer.effectAllowed = "move";
+      e.dataTransfer.setData("text/plain", String(chapterId));
+    },
+    [],
+  );
+
+  const handleDragOver = useCallback(
+    (targetMeetingId: number) => (e: React.DragEvent) => {
+      e.preventDefault();
+      e.dataTransfer.dropEffect = "move";
+      setDropTarget(targetMeetingId);
+    },
+    [],
+  );
+
+  const handleDragLeave = useCallback(() => {
+    setDropTarget(null);
+  }, []);
+
+  const handleDrop = useCallback(
+    async (targetMeetingId: number) => {
+      setDropTarget(null);
+      if (!draggedChapter || !schedule) return;
+
+      const { chapterId, sourceMeetingId } = draggedChapter;
+      setDraggedChapter(null);
+
+      // Same meeting — no-op
+      if (sourceMeetingId === targetMeetingId) return;
+
+      // Optimistically update UI
+      const updatedMeetings = schedule.meetings.map((m) => ({
+        ...m,
+        chapter_ids: [...m.chapter_ids],
+        chapters: [...m.chapters],
+      }));
+
+      // Remove from source
+      if (sourceMeetingId !== null) {
+        const source = updatedMeetings.find((m) => m.id === sourceMeetingId);
+        if (source) {
+          source.chapter_ids = source.chapter_ids.filter((id) => id !== chapterId);
+          source.chapters = source.chapters.filter((ch) => ch.id !== chapterId);
+        }
+      }
+
+      // Add to target
+      const target = updatedMeetings.find((m) => m.id === targetMeetingId);
+      if (target && !target.chapter_ids.includes(chapterId)) {
+        target.chapter_ids = [...target.chapter_ids, chapterId];
+        // Find chapter data
+        const allChapters = schedule.meetings.flatMap((m) => m.chapters);
+        const movedChapter = allChapters.find((ch) => ch.id === chapterId);
+        if (movedChapter) {
+          target.chapters = [...target.chapters, movedChapter];
+        }
+      }
+
+      setSchedule({ ...schedule, meetings: updatedMeetings });
+
+      // Persist to backend
+      try {
+        await schedulesApi.updateMeeting(schedule.id, targetMeetingId, {
+          chapter_ids: target?.chapter_ids ?? [],
+        });
+        if (sourceMeetingId !== null) {
+          const source = updatedMeetings.find((m) => m.id === sourceMeetingId);
+          if (source) {
+            await schedulesApi.updateMeeting(schedule.id, sourceMeetingId, {
+              chapter_ids: source.chapter_ids,
+            });
+          }
+        }
+      } catch (err) {
+        setError("Failed to save changes. Please try again.");
+        // Reload to reset
+        void loadData();
+      }
+    },
+    [draggedChapter, schedule, loadData],
+  );
+
+  const handleUnassignDrop = useCallback(
+    async () => {
+      setDropTarget(null);
+      if (!draggedChapter || !schedule) return;
+      const { chapterId, sourceMeetingId } = draggedChapter;
+      setDraggedChapter(null);
+
+      if (sourceMeetingId === null) return;
+
+      // Remove from source
+      const updatedMeetings = schedule.meetings.map((m) => ({
+        ...m,
+        chapter_ids: [...m.chapter_ids],
+        chapters: [...m.chapters],
+      }));
+      const source = updatedMeetings.find((m) => m.id === sourceMeetingId);
+      if (source) {
+        source.chapter_ids = source.chapter_ids.filter((id) => id !== chapterId);
+        source.chapters = source.chapters.filter((ch) => ch.id !== chapterId);
+      }
+
+      setSchedule({ ...schedule, meetings: updatedMeetings });
+
+      try {
+        await schedulesApi.updateMeeting(schedule.id, sourceMeetingId, {
+          chapter_ids: source?.chapter_ids ?? [],
+        });
+      } catch {
+        setError("Failed to save changes.");
+        void loadData();
+      }
+    },
+    [draggedChapter, schedule, loadData],
+  );
+
+  const handleDragEnd = useCallback(() => {
+    setDraggedChapter(null);
+    setDropTarget(null);
+  }, []);
+
+  /* ---- styles ---- */
+  const containerStyle: React.CSSProperties = {
+    maxWidth: 1200,
+    margin: "0 auto",
+    padding: isMobile ? 12 : 24,
+    minHeight: "100vh",
+    background: "#f8f9fa",
+  };
+
+  const headerStyle: React.CSSProperties = {
+    display: "flex",
+    alignItems: "center",
+    gap: 12,
+    marginBottom: 24,
+    flexWrap: "wrap",
+  };
+
+  const backBtnStyle: React.CSSProperties = {
+    padding: "8px 16px",
+    borderRadius: 8,
+    border: "1px solid #e5e7eb",
+    background: "#fff",
+    color: "#374151",
+    fontSize: 14,
+    cursor: "pointer",
+  };
+
+  const btnPrimaryStyle: React.CSSProperties = {
+    padding: "10px 24px",
+    borderRadius: 8,
+    border: "none",
+    background: "#4f46e5",
+    color: "#fff",
+    fontSize: 14,
+    fontWeight: 600,
+    cursor: "pointer",
+    opacity: generating ? 0.7 : 1,
+    minHeight: 44,
+  };
+
+  const confirmBtnStyle: React.CSSProperties = {
+    ...btnPrimaryStyle,
+    background: "#16a34a",
+  };
+
+  const meetingsGridStyle: React.CSSProperties = {
+    display: "grid",
+    gridTemplateColumns: isMobile
+      ? "1fr"
+      : `repeat(${schedule?.meeting_count ?? 4}, 1fr)`,
+    gap: 16,
+    marginTop: 16,
+  };
+
+  const meetingCardStyle = (isDropTarget: boolean): React.CSSProperties => ({
+    background: isDropTarget ? "#eef2ff" : "#fff",
+    borderRadius: 12,
+    border: `2px solid ${isDropTarget ? "#4f46e5" : "#e5e7eb"}`,
+    padding: 16,
+    minHeight: 200,
+    transition: "border-color 0.2s, background 0.2s",
+  });
+
+  const chapterChipStyle: React.CSSProperties = {
+    background: "#f3f4f6",
+    borderRadius: 8,
+    padding: "8px 12px",
+    marginBottom: 8,
+    cursor: "grab",
+    fontSize: 13,
+    color: "#374151",
+    border: "1px solid #e5e7eb",
+    userSelect: "none" as const,
+  };
+
+  /* ---- render ---- */
+
+  if (!validId) {
+    return (
+      <div style={containerStyle}>
+        <p style={{ color: "#ef4444" }}>Invalid ebook ID.</p>
+      </div>
+    );
+  }
+
+  if (loading) {
+    return (
+      <div style={containerStyle}>
+        <div style={{ display: "flex", justifyContent: "center", alignItems: "center", minHeight: 400 }}>
+          <p style={{ color: "#888" }}>{t("common.loading")}</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div style={containerStyle}>
+        <button onClick={() => navigate(-1)} style={backBtnStyle}>← Back</button>
+        <div style={{ textAlign: "center", padding: 60 }}>
+          <p style={{ color: "#ef4444", marginBottom: 16 }}>{error}</p>
+          <button onClick={() => void loadData()} style={btnPrimaryStyle}>
+            {t("common.retry")}
+          </button>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div style={containerStyle}>
+      {/* Header */}
+      <div style={headerStyle}>
+        <button onClick={() => navigate("/")} style={backBtnStyle}>
+          ← {isMobile ? "Library" : "Back to Library"}
+        </button>
+        <div style={{ flex: 1 }}>
+          <h1 style={{ fontSize: isMobile ? 18 : 24, margin: 0, color: "#1f2937" }}>
+            Reading Schedule
+          </h1>
+          {ebook && (
+            <p style={{ color: "#6b7280", fontSize: 14, margin: "4px 0 0" }}>
+              {ebook.title}{ebook.author ? ` — ${ebook.author}` : ""}
+            </p>
+          )}
+        </div>
+        {!schedule && (
+          <button onClick={handleGenerate} style={btnPrimaryStyle} disabled={generating}>
+            {generating ? "Generating..." : "Generate Recommendations"}
+          </button>
+        )}
+        {schedule && (
+          <div style={{ display: "flex", gap: 8, flexWrap: "wrap" }}>
+            <button onClick={handleRegenerate} style={btnPrimaryStyle} disabled={generating}>
+              {generating ? "Regenerating..." : "Regenerate"}
+            </button>
+            {!schedule.confirmed && (
+              <button onClick={handleConfirm} style={confirmBtnStyle}>
+                Confirm Schedule
+              </button>
+            )}
+          </div>
+        )}
+      </div>
+
+      {/* Status badge */}
+      {schedule && (
+        <div style={{ marginBottom: 16 }}>
+          <span style={{
+            padding: "4px 12px",
+            borderRadius: 999,
+            fontSize: 13,
+            fontWeight: 600,
+            background: schedule.confirmed ? "#dcfce7" : "#fef3c7",
+            color: schedule.confirmed ? "#16a34a" : "#b45309",
+          }}>
+            {schedule.confirmed ? "✓ Confirmed" : "Draft — drag chapters to adjust"}
+          </span>
+        </div>
+      )}
+
+      {/* No schedule yet */}
+      {!schedule && (
+        <div style={{ textAlign: "center", padding: "60px 16px" }}>
+          <div style={{ fontSize: 48, marginBottom: 16 }}>📅</div>
+          <h2 style={{ fontSize: 20, color: "#1f2937", marginBottom: 8 }}>
+            No Schedule Yet
+          </h2>
+          <p style={{ color: "#6b7280", marginBottom: 24, maxWidth: 400, margin: "0 auto 24px" }}>
+            Generate a reading schedule to split this book into balanced weekly assignments for your group.
+          </p>
+          <button onClick={handleGenerate} style={btnPrimaryStyle} disabled={generating}>
+            {generating ? "Generating..." : "Generate Recommendations"}
+          </button>
+        </div>
+      )}
+
+      {/* Schedule meetings */}
+      {schedule && (
+        <>
+          {/* Unassigned drop zone */}
+          <div
+            style={{
+              padding: "12px 16px",
+              background: dropTarget === null && draggedChapter ? "#fef2f2" : "#f9fafb",
+              borderRadius: 8,
+              border: `2px dashed ${dropTarget === null && draggedChapter ? "#ef4444" : "#d1d5db"}`,
+              marginBottom: 16,
+              textAlign: "center",
+              color: "#6b7280",
+              fontSize: 13,
+              minHeight: 44,
+              display: "flex",
+              alignItems: "center",
+              justifyContent: "center",
+              transition: "all 0.2s",
+            }}
+            onDragOver={(e) => { e.preventDefault(); e.dataTransfer.dropEffect = "move"; setDropTarget(null); }}
+            onDrop={handleUnassignDrop}
+            onDragLeave={() => setDropTarget(null)}
+          >
+            {dropTarget === null && draggedChapter
+              ? "Drop here to unassign"
+              : "Drag chapters here to unassign from meetings"}
+          </div>
+
+          {/* Meetings grid */}
+          <div style={meetingsGridStyle}>
+            {schedule.meetings.map((meeting, idx) => (
+              <MeetingColumn
+                key={meeting.id}
+                meeting={meeting}
+                index={idx}
+                isDropTarget={dropTarget === meeting.id}
+                isConfirmed={schedule.confirmed}
+                onDragStart={handleDragStart}
+                onDragOver={handleDragOver(meeting.id)}
+                onDragLeave={handleDragLeave}
+                onDrop={() => void handleDrop(meeting.id)}
+                onDragEnd={handleDragEnd}
+              />
+            ))}
+          </div>
+        </>
+      )}
+
+      {/* Drag overlay instruction */}
+      {draggedChapter && (
+        <div style={{
+          position: "fixed",
+          bottom: 24,
+          left: "50%",
+          transform: "translateX(-50%)",
+          background: "#1f2937",
+          color: "#fff",
+          padding: "12px 24px",
+          borderRadius: 12,
+          fontSize: 14,
+          boxShadow: "0 4px 16px rgba(0,0,0,0.2)",
+          zIndex: 999,
+        }}>
+          Drop the chapter into a meeting column
+        </div>
+      )}
+    </div>
+  );
+}
+
+/* ---- Meeting Column Sub-component ---- */
+
+interface MeetingColumnProps {
+  meeting: MeetingSection;
+  index: number;
+  isDropTarget: boolean;
+  isConfirmed: boolean;
+  onDragStart: (chapterId: number, sourceMeetingId: number | null) => (e: React.DragEvent) => void;
+  onDragOver: (e: React.DragEvent) => void;
+  onDragLeave: () => void;
+  onDrop: () => void;
+  onDragEnd: () => void;
+}
+
+function MeetingColumn({
+  meeting,
+  index,
+  isDropTarget,
+  isConfirmed,
+  onDragStart,
+  onDragOver,
+  onDragLeave,
+  onDrop,
+  onDragEnd,
+}: MeetingColumnProps) {
+  const chapterCount = meeting.chapter_ids.length;
+
+  const cardStyle: React.CSSProperties = {
+    background: isDropTarget ? "#eef2ff" : "#fff",
+    borderRadius: 12,
+    border: `2px solid ${isDropTarget ? "#4f46e5" : "#e5e7eb"}`,
+    overflow: "hidden",
+    transition: "border-color 0.2s, background 0.2s",
+  };
+
+  const headerStyle: React.CSSProperties = {
+    padding: "12px 16px",
+    background: "#f9fafb",
+    borderBottom: "1px solid #e5e7eb",
+  };
+
+  const bodyStyle: React.CSSProperties = {
+    padding: "12px 16px",
+    minHeight: 120,
+  };
+
+  return (
+    <div style={cardStyle}>
+      <div style={headerStyle}>
+        <div style={{ fontWeight: 700, color: "#1f2937", fontSize: 15, marginBottom: 4 }}>
+          Week {index + 1}
+        </div>
+        <div style={{ display: "flex", gap: 16, fontSize: 12, color: "#6b7280" }}>
+          <span>{chapterCount} {chapterCount === 1 ? "chapter" : "chapters"}</span>
+          <span>{formatTime(meeting.estimated_time_minutes)}</span>
+        </div>
+      </div>
+      <div
+        style={bodyStyle}
+        onDragOver={isConfirmed ? undefined : onDragOver}
+        onDragLeave={isConfirmed ? undefined : onDragLeave}
+        onDrop={isConfirmed ? undefined : onDrop}
+      >
+        {meeting.chapters.length === 0 && (
+          <div style={{
+            color: "#9ca3af",
+            fontSize: 13,
+            textAlign: "center",
+            padding: "20px 0",
+            fontStyle: "italic",
+          }}>
+            {isDropTarget ? "Drop here" : "No chapters assigned"}
+          </div>
+        )}
+        {meeting.chapters.map((chapter) => (
+          <div
+            key={`${meeting.id}-${chapter.id}`}
+            draggable={!isConfirmed}
+            onDragStart={isConfirmed ? undefined : onDragStart(chapter.id, meeting.id)}
+            onDragEnd={isConfirmed ? undefined : onDragEnd}
+            style={{
+              background: "#f3f4f6",
+              borderRadius: 8,
+              padding: "8px 12px",
+              marginBottom: 8,
+              cursor: isConfirmed ? "default" : "grab",
+              fontSize: 13,
+              color: "#374151",
+              border: "1px solid #e5e7eb",
+              userSelect: "none" as const,
+              opacity: isConfirmed ? 0.8 : 1,
+            }}
+          >
+            <div style={{ fontWeight: 600, marginBottom: 2 }}>{chapter.title}</div>
+            {chapter.href && (
+              <div style={{ fontSize: 11, color: "#9ca3af" }}>{chapter.href}</div>
+            )}
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

frontend/src/types/book.ts

@@ -102,3 +102,27 @@ export interface BookSearchParams {
   page?: number;
   page_size?: number;
 }
+
+export interface MeetingSection {
+  id: number;
+  meeting_index: number;
+  title: string;
+  estimated_time_minutes: number;
+  chapter_ids: number[];
+  chapters: BookChapter[];
+}
+
+export interface ReadingSchedule {
+  id: number;
+  ebook: number;
+  meeting_count: number;
+  confirmed: boolean;
+  meetings: MeetingSection[];
+  created_at: string;
+  updated_at: string;
+}
+
+export interface GenerateRecommendationsRequest {
+  ebook_id: number;
+  meeting_count?: number;
+}

frontend/src/types/group.ts

@@ -1,109 +0,0 @@
-/** Types for reading groups, group books, sections, and schedules */
-
-export interface ReadingGroup {
-  id: number;
-  name: string;
-  description: string;
-  admin: number;
-  admin_email: string;
-  member_count: number;
-  created_at: string;
-  updated_at: string;
-}
-
-export interface ReadingGroupDetail {
-  id: number;
-  name: string;
-  description: string;
-  admin: number;
-  admin_email: string;
-  members: GroupMembership[];
-  created_at: string;
-  updated_at: string;
-}
-
-export interface GroupMembership {
-  id: number;
-  user: number;
-  user_email: string;
-  user_username: string;
-  role: "admin" | "member";
-  joined_at: string;
-}
-
-export interface GroupBook {
-  id: number;
-  title: string;
-  status: "active" | "replaced";
-  ebook: {
-    id: number;
-    title: string;
-    author: string;
-    filename: string;
-    format: string;
-    page_count: number;
-    file_size: number;
-    cover_image: string | null;
-    created_at: string;
-  };
-  uploaded_by: number;
-  uploaded_by_email: string;
-  section_count: number;
-  created_at: string;
-  updated_at: string;
-}
-
-export interface Section {
-  id: number;
-  title: string;
-  order: number;
-  start_chapter_index: number;
-  end_chapter_index: number;
-  estimated_reading_minutes: number;
-  created_at: string;
-}
-
-export interface GroupBookDetail extends GroupBook {
-  sections: Section[];
-  schedules: ReadingSchedule[];
-}
-
-export interface ReadingSchedule {
-  id: number;
-  meeting_number: number;
-  week_date: string;
-  section_ids: number[];
-  section_details: Section[];
-  created_at: string;
-}
-
-export interface MemberProgress {
-  id: number;
-  user: number;
-  user_email: string;
-  user_username: string;
-  current_section: number | null;
-  current_section_title: string | null;
-  completed_sections: number[];
-  updated_at: string;
-}
-
-export interface CreateGroupPayload {
-  name: string;
-  description?: string;
-}
-
-export interface AddMemberPayload {
-  user_id: number;
-}
-
-export interface CreateGroupBookPayload {
-  ebook_id: number;
-  title?: string;
-}
-
-export interface AdjustSectionsPayload {
-  operation: "merge" | "split";
-  section_ids: number[];
-  split_at?: number;
-}

packages/shared/src/types.ts

@@ -216,47 +216,3 @@ export interface ApiError {
   detail?: string;
   [key: string]: unknown;
 }
-
-// ---- Reading Groups ----
-
-export interface ReadingGroup {
-  id: number;
-  name: string;
-  description: string;
-  admin: number;
-  admin_email: string;
-  member_count: number;
-  created_at: string;
-  updated_at: string;
-}
-
-export interface GroupMembership {
-  id: number;
-  user: number;
-  user_email: string;
-  user_username: string;
-  role: "admin" | "member";
-  joined_at: string;
-}
-
-export interface GroupBookSummary {
-  id: number;
-  title: string;
-  status: "active" | "replaced";
-  section_count: number;
-  created_at: string;
-}
-
-export interface SectionSummary {
-  id: number;
-  title: string;
-  order: number;
-  estimated_reading_minutes: number;
-}
-
-export interface ReadingScheduleEntry {
-  id: number;
-  meeting_number: number;
-  week_date: string;
-  section_ids: number[];
-}

packages/shared/src/utils.ts

@@ -114,14 +114,4 @@ export const API_ENDPOINTS = {
     bookmarkDetail: (id: string) => `/api/annotations/bookmarks/${id}/`,
     noteDetail: (id: string) => `/api/annotations/notes/${id}/`,
   },
-  groups: {
-    list: "/api/groups/",
-    detail: (id: number) => `/api/groups/${id}/`,
-    books: (groupId: number) => `/api/groups/${groupId}/books/`,
-    bookDetail: (groupId: number, bookId: number) => `/api/groups/${groupId}/books/${bookId}/`,
-    detectSections: (groupId: number, bookId: number) => `/api/groups/${groupId}/books/${bookId}/detect-sections/`,
-    adjustSections: (groupId: number, bookId: number) => `/api/groups/${groupId}/books/${bookId}/adjust-sections/`,
-    schedule: (groupId: number, bookId: number) => `/api/groups/${groupId}/books/${bookId}/schedule/`,
-    progress: (groupId: number, bookId: number) => `/api/groups/${groupId}/books/${bookId}/progress/`,
-  },
 } as const;