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

@@ -1,38 +0,0 @@
-from django.contrib import admin
-
-from apps.groups.models import (
-    GroupMeeting,
-    GroupMembership,
-    NotificationPreference,
-    PaceNotification,
-    ReadingGroup,
-)
-
-
-@admin.register(ReadingGroup)
-class ReadingGroupAdmin(admin.ModelAdmin):
-    list_display = ["name", "created_by", "created_at"]
-    search_fields = ["name"]
-
-
-@admin.register(GroupMembership)
-class GroupMembershipAdmin(admin.ModelAdmin):
-    list_display = ["user", "group", "role", "joined_at"]
-    list_filter = ["role"]
-
-
-@admin.register(GroupMeeting)
-class GroupMeetingAdmin(admin.ModelAdmin):
-    list_display = ["group", "title", "target_section_label", "scheduled_at"]
-    list_filter = ["group"]
-
-
-@admin.register(NotificationPreference)
-class NotificationPreferenceAdmin(admin.ModelAdmin):
-    list_display = ["user", "pace_notifications_enabled", "reminder_enabled", "frequency"]
-
-
-@admin.register(PaceNotification)
-class PaceNotificationAdmin(admin.ModelAdmin):
-    list_display = ["user", "meeting", "status", "created_at"]
-    list_filter = ["status"]

backend/apps/groups/apps.py

@@ -1,8 +0,0 @@
-from django.apps import AppConfig
-
-
-class GroupsConfig(AppConfig):
-    default_auto_field = "django.db.models.BigAutoField"
-    name = "apps.groups"
-    verbose_name = "Reading Groups"
-    label = "groups"

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

@@ -1,109 +0,0 @@
-# Generated by Django 5.1.7 on 2026-06-20 19:22
-
-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'),
-        ('users', '0001_initial'),
-        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
-    ]
-
-    operations = [
-        migrations.CreateModel(
-            name='NotificationPreference',
-            fields=[
-                ('user', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, primary_key=True, related_name='notification_preference', serialize=False, to=settings.AUTH_USER_MODEL)),
-                ('pace_notifications_enabled', models.BooleanField(default=True)),
-                ('reminder_enabled', models.BooleanField(default=True)),
-                ('frequency', models.CharField(choices=[('daily', 'Daily'), ('weekly', 'Weekly')], default='daily', max_length=16)),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('updated_at', models.DateTimeField(auto_now=True)),
-            ],
-            options={
-                'verbose_name': 'Notification Preference',
-                'verbose_name_plural': 'Notification Preferences',
-                'db_table': 'groups_notification_preference',
-            },
-        ),
-        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)),
-                ('book', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='reading_groups', to='books.book')),
-                ('created_by', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='created_groups', to=settings.AUTH_USER_MODEL)),
-                ('ebook', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='reading_groups', to='books.ebook')),
-            ],
-            options={
-                'verbose_name': 'Reading Group',
-                'verbose_name_plural': 'Reading Groups',
-                'db_table': 'groups_reading_group',
-                'ordering': ['-created_at'],
-            },
-        ),
-        migrations.CreateModel(
-            name='GroupMeeting',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('title', models.CharField(blank=True, default='', max_length=512)),
-                ('scheduled_at', models.DateTimeField(db_index=True)),
-                ('target_section', models.PositiveIntegerField(default=0, help_text='Target chapter/section index to reach by this meeting')),
-                ('target_section_label', models.CharField(blank=True, default='', help_text="Human-readable label for the target section (e.g. 'Section 3')", max_length=512)),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('group', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='meetings', to='groups.readinggroup')),
-            ],
-            options={
-                'verbose_name': 'Group Meeting',
-                'verbose_name_plural': 'Group Meetings',
-                'db_table': 'groups_meeting',
-                'ordering': ['scheduled_at'],
-            },
-        ),
-        migrations.CreateModel(
-            name='PaceNotification',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('status', models.CharField(choices=[('pending', 'Pending'), ('sent', 'Sent'), ('dismissed', 'Dismissed')], default='pending', max_length=16)),
-                ('current_section', models.PositiveIntegerField(default=0)),
-                ('target_section', models.PositiveIntegerField(default=0)),
-                ('ahead_behind_delta', models.IntegerField(default=0)),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('ebook', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='pace_notifications', to='books.ebook')),
-                ('meeting', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='pace_notifications', to='groups.groupmeeting')),
-                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='pace_notifications', to=settings.AUTH_USER_MODEL)),
-            ],
-            options={
-                'verbose_name': 'Pace Notification',
-                'verbose_name_plural': 'Pace Notifications',
-                'db_table': 'groups_pace_notification',
-                'ordering': ['-created_at'],
-                'indexes': [models.Index(fields=['user', 'meeting', 'ebook'], name='groups_pace_user_id_18e929_idx')],
-            },
-        ),
-        migrations.CreateModel(
-            name='GroupMembership',
-            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)),
-                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='group_memberships', to=settings.AUTH_USER_MODEL)),
-                ('group', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='memberships', to='groups.readinggroup')),
-            ],
-            options={
-                'verbose_name': 'Group Membership',
-                'verbose_name_plural': 'Group Memberships',
-                'db_table': 'groups_membership',
-                'indexes': [models.Index(fields=['user', 'group'], name='groups_memb_user_id_9cda7e_idx')],
-                'unique_together': {('user', 'group')},
-            },
-        ),
-    ]

backend/apps/groups/models.py

@@ -1,190 +0,0 @@
-from __future__ import annotations
-
-from django.conf import settings
-from django.db import models
-
-
-class FrequencyChoice(models.TextChoices):
-    DAILY = "daily", "Daily"
-    WEEKLY = "weekly", "Weekly"
-
-
-class MembershipRole(models.TextChoices):
-    ADMIN = "admin", "Admin"
-    MEMBER = "member", "Member"
-
-
-class NotificationStatus(models.TextChoices):
-    PENDING = "pending", "Pending"
-    SENT = "sent", "Sent"
-    DISMISSED = "dismissed", "Dismissed"
-
-
-class ReadingGroup(models.Model):
-    """A group of users reading a book together with scheduled meetings."""
-
-    name = models.CharField(max_length=256, db_index=True)
-    description = models.TextField(blank=True, default="")
-    book = models.ForeignKey(
-        "books.Book",
-        on_delete=models.SET_NULL,
-        null=True,
-        blank=True,
-        related_name="reading_groups",
-    )
-    ebook = models.ForeignKey(
-        "books.EBook",
-        on_delete=models.SET_NULL,
-        null=True,
-        blank=True,
-        related_name="reading_groups",
-    )
-    created_by = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="created_groups",
-    )
-    created_at = models.DateTimeField(auto_now_add=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 GroupMembership(models.Model):
-    """User membership in a reading group."""
-
-    user = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="group_memberships",
-    )
-    group = models.ForeignKey(
-        ReadingGroup,
-        on_delete=models.CASCADE,
-        related_name="memberships",
-    )
-    role = models.CharField(
-        max_length=16,
-        choices=MembershipRole.choices,
-        default=MembershipRole.MEMBER,
-    )
-    joined_at = models.DateTimeField(auto_now_add=True)
-
-    class Meta:
-        db_table = "groups_membership"
-        verbose_name = "Group Membership"
-        verbose_name_plural = "Group Memberships"
-        unique_together = [("user", "group")]
-        indexes = [models.Index(fields=["user", "group"])]
-
-    def __str__(self) -> str:
-        return f"{self.user} in {self.group}"
-
-
-class GroupMeeting(models.Model):
-    """A scheduled meeting for a reading group with a target section."""
-
-    group = models.ForeignKey(
-        ReadingGroup,
-        on_delete=models.CASCADE,
-        related_name="meetings",
-    )
-    title = models.CharField(max_length=512, blank=True, default="")
-    scheduled_at = models.DateTimeField(db_index=True)
-    target_section = models.PositiveIntegerField(
-        default=0,
-        help_text="Target chapter/section index to reach by this meeting",
-    )
-    target_section_label = models.CharField(
-        max_length=512,
-        blank=True,
-        default="",
-        help_text="Human-readable label for the target section (e.g. 'Section 3')",
-    )
-    created_at = models.DateTimeField(auto_now_add=True)
-
-    class Meta:
-        db_table = "groups_meeting"
-        verbose_name = "Group Meeting"
-        verbose_name_plural = "Group Meetings"
-        ordering = ["scheduled_at"]
-
-    def __str__(self) -> str:
-        return f"{self.group.name} — {self.title or self.target_section_label} ({self.scheduled_at.date()})"
-
-
-class NotificationPreference(models.Model):
-    """Per-user notification settings for reading pace alerts."""
-
-    user = models.OneToOneField(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="notification_preference",
-        primary_key=True,
-    )
-    pace_notifications_enabled = models.BooleanField(default=True)
-    reminder_enabled = models.BooleanField(default=True)
-    frequency = models.CharField(
-        max_length=16,
-        choices=FrequencyChoice.choices,
-        default=FrequencyChoice.DAILY,
-    )
-    created_at = models.DateTimeField(auto_now_add=True)
-    updated_at = models.DateTimeField(auto_now=True)
-
-    class Meta:
-        db_table = "groups_notification_preference"
-        verbose_name = "Notification Preference"
-        verbose_name_plural = "Notification Preferences"
-
-    def __str__(self) -> str:
-        return f"{self.user} — pace={'on' if self.pace_notifications_enabled else 'off'}, freq={self.frequency}"
-
-
-class PaceNotification(models.Model):
-    """Tracks reading pace notifications sent to users to avoid duplicates."""
-
-    user = models.ForeignKey(
-        settings.AUTH_USER_MODEL,
-        on_delete=models.CASCADE,
-        related_name="pace_notifications",
-    )
-    meeting = models.ForeignKey(
-        GroupMeeting,
-        on_delete=models.CASCADE,
-        related_name="pace_notifications",
-    )
-    ebook = models.ForeignKey(
-        "books.EBook",
-        on_delete=models.CASCADE,
-        related_name="pace_notifications",
-        null=True,
-        blank=True,
-    )
-    status = models.CharField(
-        max_length=16,
-        choices=NotificationStatus.choices,
-        default=NotificationStatus.PENDING,
-    )
-    current_section = models.PositiveIntegerField(default=0)
-    target_section = models.PositiveIntegerField(default=0)
-    ahead_behind_delta = models.IntegerField(default=0)
-    created_at = models.DateTimeField(auto_now_add=True)
-
-    class Meta:
-        db_table = "groups_pace_notification"
-        verbose_name = "Pace Notification"
-        verbose_name_plural = "Pace Notifications"
-        ordering = ["-created_at"]
-        indexes = [
-            models.Index(fields=["user", "meeting", "ebook"]),
-        ]
-
-    def __str__(self) -> str:
-        return f"{self.user} — meeting {self.meeting_id}: {self.get_status_display()}"

backend/apps/groups/serializers.py

@@ -1,137 +0,0 @@
-from __future__ import annotations
-
-from rest_framework import serializers
-
-from apps.groups.models import (
-    FrequencyChoice,
-    GroupMeeting,
-    GroupMembership,
-    NotificationPreference,
-    PaceNotification,
-    ReadingGroup,
-)
-from apps.groups.services.pace import PaceStatus
-
-
-class NotificationPreferenceSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = NotificationPreference
-        fields = [
-            "pace_notifications_enabled",
-            "reminder_enabled",
-            "frequency",
-        ]
-
-    def validate_frequency(self, value: str) -> str:
-        valid = {choice[0] for choice in FrequencyChoice.choices}
-        if value not in valid:
-            raise serializers.ValidationError(
-                f"Frequency must be one of: {', '.join(valid)}"
-            )
-        return value
-
-
-class GroupMeetingSerializer(serializers.ModelSerializer):
-    group_name = serializers.CharField(source="group.name", read_only=True)
-
-    class Meta:
-        model = GroupMeeting
-        fields = [
-            "id",
-            "group",
-            "group_name",
-            "title",
-            "scheduled_at",
-            "target_section",
-            "target_section_label",
-            "created_at",
-        ]
-        read_only_fields = ["id", "created_at"]
-
-    def validate_target_section(self, value: int) -> int:
-        if value < 0:
-            raise serializers.ValidationError("Target section must be non-negative.")
-        return value
-
-
-class ReadingGroupSerializer(serializers.ModelSerializer):
-    member_count = serializers.SerializerMethodField()
-    meeting_count = serializers.SerializerMethodField()
-
-    class Meta:
-        model = ReadingGroup
-        fields = [
-            "id",
-            "name",
-            "description",
-            "book",
-            "ebook",
-            "created_by",
-            "created_at",
-            "member_count",
-            "meeting_count",
-        ]
-        read_only_fields = ["id", "created_by", "created_at"]
-
-    def get_member_count(self, obj: ReadingGroup) -> int:
-        return obj.memberships.count()
-
-    def get_meeting_count(self, obj: ReadingGroup) -> int:
-        return obj.meetings.count()
-
-
-class GroupMembershipSerializer(serializers.ModelSerializer):
-    user_email = serializers.CharField(source="user.email", read_only=True)
-    group_name = serializers.CharField(source="group.name", read_only=True)
-
-    class Meta:
-        model = GroupMembership
-        fields = ["id", "user", "user_email", "group", "group_name", "role", "joined_at"]
-        read_only_fields = ["id", "joined_at"]
-
-
-class PaceNotificationSerializer(serializers.ModelSerializer):
-    status_display = serializers.CharField(source="get_status_display", read_only=True)
-
-    class Meta:
-        model = PaceNotification
-        fields = [
-            "id",
-            "user",
-            "meeting",
-            "ebook",
-            "status",
-            "status_display",
-            "current_section",
-            "target_section",
-            "ahead_behind_delta",
-            "created_at",
-        ]
-        read_only_fields = ["id", "created_at"]
-
-
-class PaceStatusSerializer(serializers.Serializer):
-    meeting_id = serializers.IntegerField()
-    meeting_title = serializers.CharField()
-    scheduled_at = serializers.CharField()
-    target_section = serializers.IntegerField()
-    target_section_label = serializers.CharField()
-    current_section = serializers.IntegerField()
-    ahead_behind_delta = serializers.IntegerField()
-    status = serializers.CharField()
-    days_until_meeting = serializers.IntegerField()
-    sections_to_catch_up = serializers.IntegerField()
-    ebook_id = serializers.IntegerField()
-    ebook_title = serializers.CharField()
-
-
-class ReminderSerializer(serializers.Serializer):
-    meeting_id = serializers.IntegerField()
-    meeting_title = serializers.CharField()
-    scheduled_at = serializers.CharField()
-    target_section = serializers.IntegerField()
-    target_section_label = serializers.CharField()
-    group_name = serializers.CharField()
-    hours_until = serializers.IntegerField()
-    ebook_id = serializers.IntegerField()
-    ebook_title = serializers.CharField()

backend/apps/groups/services/pace.py

@@ -1,219 +0,0 @@
-"""Pace calculation service for reading progress vs meeting targets."""
-
-from __future__ import annotations
-
-import logging
-from datetime import datetime, timedelta
-from typing import TypedDict
-
-from django.db.models import QuerySet
-from django.utils import timezone
-
-from apps.books.models import EBook, ReadingProgress
-from apps.groups.models import (
-    GroupMeeting,
-    GroupMembership,
-    NotificationPreference,
-    PaceNotification,
-    NotificationStatus,
-)
-
-logger = logging.getLogger(__name__)
-
-
-class PaceStatus(TypedDict):
-    meeting_id: int
-    meeting_title: str
-    scheduled_at: str
-    target_section: int
-    target_section_label: str
-    current_section: int
-    ahead_behind_delta: int
-    status: str  # "ahead", "behind", "on_track", "completed"
-    days_until_meeting: int
-    sections_to_catch_up: int
-    ebook_id: int
-    ebook_title: str
-
-
-def get_relevant_ebooks_for_user(user) -> QuerySet[EBook]:
-    """Return ebooks that belong to groups the user is a member of."""
-    group_ids = (
-        GroupMembership.objects.filter(user=user)
-        .values_list("group_id", flat=True)
-    )
-    return (
-        EBook.objects.filter(reading_groups__in=group_ids)
-        .select_related("reading_progress")
-        .prefetch_related("chapters")
-        .distinct()
-    )
-
-
-def calculate_pace(
-    user,
-    ebook: EBook | None = None,
-    meeting: GroupMeeting | None = None,
-) -> list[PaceStatus]:
-    """Calculate reading pace for a user's upcoming meetings.
-
-    Compares the user's current reading progress (chapter index) against
-    the target section for each upcoming meeting within 3 days.
-    """
-    now = timezone.now()
-    three_days_from_now = now + timedelta(days=3)
-
-    # Find upcoming meetings for groups the user belongs to
-    user_group_ids = (
-        GroupMembership.objects.filter(user=user)
-        .values_list("group_id", flat=True)
-    )
-    meetings_qs = GroupMeeting.objects.filter(
-        group_id__in=user_group_ids,
-        scheduled_at__gte=now,
-        scheduled_at__lte=three_days_from_now,
-    ).select_related("group", "group__ebook")
-
-    if meeting:
-        meetings_qs = meetings_qs.filter(pk=meeting.pk)
-
-    meetings = list(meetings_qs)
-
-    results: list[PaceStatus] = []
-
-    for m in meetings:
-        group_ebook = m.group.ebook
-        ebooks_to_check: list[EBook] = []
-
-        if ebook:
-            ebooks_to_check = [ebook]
-        elif group_ebook:
-            ebooks_to_check = [group_ebook]
-        else:
-            # Check all ebooks in the group
-            ebooks_to_check = list(
-                EBook.objects.filter(reading_groups=m.group)
-                .select_related("reading_progress")
-                .prefetch_related("chapters")
-            )
-
-        for eb in ebooks_to_check:
-            pace = _compute_single_pace(user, m, eb, now)
-            if pace:
-                results.append(pace)
-
-    return results
-
-
-def _compute_single_pace(
-    user,
-    meeting: GroupMeeting,
-    ebook: EBook,
-    now: datetime,
-) -> PaceStatus | None:
-    """Compute pace for one user + meeting + ebook combination."""
-    try:
-        progress = ebook.reading_progress
-    except ReadingProgress.DoesNotExist:
-        # No progress yet — user hasn't started reading
-        return None
-
-    # Current section: based on last_page (chapter index) or computed from progress %
-    if progress.last_page > 0:
-        current_section = progress.last_page
-    elif progress.current_position > 0:
-        chapter_count = ebook.chapters.count() or ebook.page_count or 1
-        current_section = max(1, int((progress.current_position / 100) * chapter_count))
-    else:
-        current_section = 0
-
-    target_section = meeting.target_section or 0
-    if target_section == 0:
-        return None
-
-    delta = current_section - target_section
-    days_until = max(0, (meeting.scheduled_at - now).days)
-
-    if current_section >= target_section:
-        if current_section >= target_section and progress.current_position > 0:
-            status = "completed"
-        else:
-            status = "ahead"
-    elif delta >= -1:
-        status = "on_track"
-    else:
-        status = "behind"
-
-    return PaceStatus(
-        meeting_id=meeting.pk,
-        meeting_title=meeting.title or meeting.target_section_label,
-        scheduled_at=meeting.scheduled_at.isoformat(),
-        target_section=target_section,
-        target_section_label=meeting.target_section_label,
-        current_section=current_section,
-        ahead_behind_delta=delta,
-        status=status,
-        days_until_meeting=days_until,
-        sections_to_catch_up=max(0, target_section - current_section),
-        ebook_id=ebook.pk,
-        ebook_title=ebook.title,
-    )
-
-
-def should_send_notification(
-    user,
-    meeting: GroupMeeting,
-    ebook: EBook,
-) -> bool:
-    """Check if a pace notification should be sent based on user preferences."""
-    pref, _ = NotificationPreference.objects.get_or_create(user=user)
-
-    if not pref.pace_notifications_enabled:
-        return False
-
-    # Check if notification was already sent today
-    today = timezone.now().date()
-    existing = PaceNotification.objects.filter(
-        user=user,
-        meeting=meeting,
-        ebook=ebook,
-        created_at__date=today,
-    ).exclude(status=NotificationStatus.DISMISSED)
-
-    if existing.exists():
-        return False
-
-    # Frequency check
-    if pref.frequency == "weekly":
-        week_ago = today - timedelta(days=7)
-        recent = PaceNotification.objects.filter(
-            user=user,
-            meeting=meeting,
-            ebook=ebook,
-            created_at__date__gte=week_ago,
-        ).exclude(status=NotificationStatus.DISMISSED)
-        if recent.exists():
-            return False
-
-    return True
-
-
-def get_reminder_meetings(user) -> list[GroupMeeting]:
-    """Get meetings that are within 24 hours for reminder notifications."""
-    now = timezone.now()
-    tomorrow = now + timedelta(days=1)
-
-    user_group_ids = (
-        GroupMembership.objects.filter(user=user)
-        .values_list("group_id", flat=True)
-    )
-
-    return list(
-        GroupMeeting.objects.filter(
-            group_id__in=user_group_ids,
-            scheduled_at__gte=now,
-            scheduled_at__lte=tomorrow,
-        )
-        .select_related("group", "group__ebook")
-        .order_by("scheduled_at")
-    )

backend/apps/groups/urls.py

@@ -1,23 +0,0 @@
-from django.urls import include, path
-from rest_framework.routers import DefaultRouter
-
-from apps.groups.views import (
-    GroupMeetingViewSet,
-    ReadingGroupViewSet,
-    dismiss_pace_notification_view,
-    notification_preferences_view,
-    pace_status_view,
-    reminder_view,
-)
-
-router = DefaultRouter()
-router.register(r"groups", ReadingGroupViewSet, basename="reading-group")
-router.register(r"meetings", GroupMeetingViewSet, basename="group-meeting")
-
-urlpatterns = [
-    path("", include(router.urls)),
-    path("notifications/preferences/", notification_preferences_view, name="notification-preferences"),
-    path("notifications/pace/", pace_status_view, name="pace-status"),
-    path("notifications/dismiss/", dismiss_pace_notification_view, name="dismiss-pace"),
-    path("notifications/reminders/", reminder_view, name="meeting-reminders"),
-]

backend/apps/groups/views.py

@@ -1,207 +0,0 @@
-from __future__ import annotations
-
-from django.db.models import QuerySet
-from rest_framework import permissions, status, viewsets
-from rest_framework.decorators import action, api_view, permission_classes
-from rest_framework.permissions import IsAuthenticated
-from rest_framework.request import Request
-from rest_framework.response import Response
-
-from apps.books.models import EBook
-from apps.groups.models import (
-    GroupMeeting,
-    GroupMembership,
-    NotificationPreference,
-    PaceNotification,
-    NotificationStatus,
-    ReadingGroup,
-)
-from apps.groups.serializers import (
-    GroupMeetingSerializer,
-    GroupMembershipSerializer,
-    NotificationPreferenceSerializer,
-    PaceNotificationSerializer,
-    PaceStatusSerializer,
-    ReadingGroupSerializer,
-    ReminderSerializer,
-)
-from apps.groups.services.pace import (
-    calculate_pace,
-    get_reminder_meetings,
-    should_send_notification,
-)
-
-
-class IsGroupMember(permissions.BasePermission):
-    """Only allow group members to access group resources."""
-
-    def has_object_permission(self, request: Request, view: object, obj: ReadingGroup) -> bool:
-        return obj.memberships.filter(user=request.user).exists()
-
-
-class ReadingGroupViewSet(viewsets.ModelViewSet):
-    permission_classes = [IsAuthenticated, IsGroupMember]
-    serializer_class = ReadingGroupSerializer
-
-    def get_queryset(self) -> QuerySet[ReadingGroup]:
-        return (
-            ReadingGroup.objects.filter(memberships__user=self.request.user)
-            .prefetch_related("memberships", "meetings")
-            .distinct()
-        )
-
-    def perform_create(self, serializer) -> None:
-        group = serializer.save(created_by=self.request.user)
-        GroupMembership.objects.create(
-            user=self.request.user,
-            group=group,
-            role="admin",
-        )
-
-    @action(detail=False, methods=["get"], url_path="all")
-    def all_groups(self, request: Request) -> Response:
-        """Return all groups (for discovery)."""
-        qs = ReadingGroup.objects.all().prefetch_related("memberships", "meetings")
-        page = self.paginate_queryset(qs)
-        if page is not None:
-            serializer = self.get_serializer(page, many=True)
-            return self.get_paginated_response(serializer.data)
-        serializer = self.get_serializer(qs, many=True)
-        return Response(serializer.data)
-
-
-class GroupMeetingViewSet(viewsets.ModelViewSet):
-    permission_classes = [IsAuthenticated]
-    serializer_class = GroupMeetingSerializer
-
-    def get_queryset(self) -> QuerySet[GroupMeeting]:
-        user_group_ids = (
-            GroupMembership.objects.filter(user=self.request.user)
-            .values_list("group_id", flat=True)
-        )
-        return GroupMeeting.objects.filter(group_id__in=user_group_ids).select_related(
-            "group"
-        )
-
-    def perform_create(self, serializer) -> None:
-        group = serializer.validated_data["group"]
-        if not group.memberships.filter(user=self.request.user).exists():
-            raise permissions.PermissionDenied("You must be a group member to create meetings.")
-        serializer.save()
-
-    @action(detail=False, methods=["get"], url_path="upcoming")
-    def upcoming(self, request: Request) -> Response:
-        """Return upcoming meetings for the user's groups (within 3 days)."""
-        from django.utils import timezone
-        from datetime import timedelta
-
-        now = timezone.now()
-        three_days = now + timedelta(days=3)
-        qs = self.get_queryset().filter(
-            scheduled_at__gte=now,
-            scheduled_at__lte=three_days,
-        )
-        serializer = self.get_serializer(qs, many=True)
-        return Response(serializer.data)
-
-
-@api_view(["GET", "PATCH"])
-@permission_classes([IsAuthenticated])
-def notification_preferences_view(request: Request) -> Response:
-    """Get or update notification preferences for the current user."""
-    pref, _created = NotificationPreference.objects.get_or_create(user=request.user)
-
-    if request.method == "GET":
-        serializer = NotificationPreferenceSerializer(pref)
-        return Response(serializer.data)
-
-    serializer = NotificationPreferenceSerializer(pref, data=request.data, partial=True)
-    serializer.is_valid(raise_exception=True)
-    serializer.save()
-    return Response(serializer.data)
-
-
-@api_view(["GET"])
-@permission_classes([IsAuthenticated])
-def pace_status_view(request: Request) -> Response:
-    """Get reading pace status for the current user's upcoming meetings."""
-    ebook_id = request.query_params.get("ebook_id")
-    ebook: EBook | None = None
-
-    if ebook_id:
-        try:
-            ebook = EBook.objects.select_related("reading_progress").prefetch_related("chapters").get(
-                pk=ebook_id, user=request.user
-            )
-        except EBook.DoesNotExist:
-            return Response(
-                {"error": "EBook not found."}, status=status.HTTP_404_NOT_FOUND
-            )
-
-    pace_data = calculate_pace(request.user, ebook=ebook)
-    serializer = PaceStatusSerializer(pace_data, many=True)
-    return Response(serializer.data)
-
-
-@api_view(["POST"])
-@permission_classes([IsAuthenticated])
-def dismiss_pace_notification_view(request: Request) -> Response:
-    """Dismiss a pace notification so it won't show again."""
-    meeting_id = request.data.get("meeting_id")
-    ebook_id = request.data.get("ebook_id")
-
-    if not meeting_id or not ebook_id:
-        return Response(
-            {"error": "meeting_id and ebook_id are required."},
-            status=status.HTTP_400_BAD_REQUEST,
-        )
-
-    PaceNotification.objects.filter(
-        user=request.user,
-        meeting_id=meeting_id,
-        ebook_id=ebook_id,
-        status=NotificationStatus.PENDING,
-    ).update(status=NotificationStatus.DISMISSED)
-
-    return Response({"status": "dismissed"})
-
-
-@api_view(["GET"])
-@permission_classes([IsAuthenticated])
-def reminder_view(request: Request) -> Response:
-    """Get pre-meeting reminders for meetings within 24 hours."""
-    pref, _ = NotificationPreference.objects.get_or_create(user=request.user)
-    if not pref.reminder_enabled:
-        return Response([])
-
-    meetings = get_reminder_meetings(request.user)
-    now_dt = __import__("django").utils.timezone.now()
-
-    reminders = []
-    for mtg in meetings:
-        group_ebook = mtg.group.ebook
-        ebook: EBook | None = group_ebook
-        if not ebook:
-            ebooks = list(
-                EBook.objects.filter(reading_groups=mtg.group).select_related("reading_progress")[:1]
-            )
-            ebook = ebooks[0] if ebooks else None
-
-        if not ebook:
-            continue
-
-        hours_until = max(0, int((mtg.scheduled_at - now_dt).total_seconds() / 3600))
-        reminders.append({
-            "meeting_id": mtg.pk,
-            "meeting_title": mtg.title or mtg.target_section_label,
-            "scheduled_at": mtg.scheduled_at.isoformat(),
-            "target_section": mtg.target_section,
-            "target_section_label": mtg.target_section_label,
-            "group_name": mtg.group.name,
-            "hours_until": hours_until,
-            "ebook_id": ebook.pk,
-            "ebook_title": ebook.title,
-        })
-
-    serializer = ReminderSerializer(reminders, many=True)
-    return Response(serializer.data)

backend/config/django.py

@@ -41,7 +41,6 @@ INSTALLED_APPS = [
     "apps.books",
     "apps.annotations",
     "apps.reader",
-    "apps.groups",
 ]
 
 MIDDLEWARE = [

backend/config/urls.py

@@ -8,7 +8,6 @@ urlpatterns = [
     path("api/books/", include("apps.books.urls")),
     path("api/annotations/", include("apps.annotations.urls")),
     path("api/reader/", include("apps.reader.urls")),
-    path("api/groups/", include("apps.groups.urls")),
 ]
 
 if settings.DEBUG:

frontend/src/App.tsx

@@ -12,6 +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 RecommendationPage = lazy(() => import("./pages/RecommendationPage").then((m) => ({ default: m.RecommendationPage })));
 
 const AuthPage = lazy(() => import("./pages/AuthPage"));
 
@@ -40,6 +41,7 @@ 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>} />

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

@@ -1,57 +0,0 @@
-import api from "./client";
-import type {
-  GroupMeeting,
-  MeetingReminder,
-  NotificationPreferences,
-  PaceStatus,
-  ReadingGroup,
-} from "../types/notifications";
-
-export const groupsApi = {
-  async getPaceStatus(ebookId?: number): Promise<PaceStatus[]> {
-    const params: Record<string, string> = {};
-    if (ebookId) params.ebook_id = String(ebookId);
-    const { data } = await api.get<PaceStatus[]>("/groups/notifications/pace/", { params });
-    return data;
-  },
-
-  async getPreferences(): Promise<NotificationPreferences> {
-    const { data } = await api.get<NotificationPreferences>("/groups/notifications/preferences/");
-    return data;
-  },
-
-  async updatePreferences(
-    prefs: Partial<NotificationPreferences>,
-  ): Promise<NotificationPreferences> {
-    const { data } = await api.patch<NotificationPreferences>(
-      "/groups/notifications/preferences/",
-      prefs,
-    );
-    return data;
-  },
-
-  async dismissPaceNotification(meetingId: number, ebookId: number): Promise<void> {
-    await api.post("/groups/notifications/dismiss/", {
-      meeting_id: meetingId,
-      ebook_id: ebookId,
-    });
-  },
-
-  async getReminders(): Promise<MeetingReminder[]> {
-    const { data } = await api.get<MeetingReminder[]>("/groups/notifications/reminders/");
-    return data;
-  },
-
-  async getGroups(): Promise<ReadingGroup[]> {
-    const { data } = await api.get<{ count: number; results: ReadingGroup[] } | ReadingGroup[]>(
-      "/groups/groups/",
-    );
-    if (Array.isArray(data)) return data;
-    return data.results ?? [];
-  },
-
-  async getUpcomingMeetings(): Promise<GroupMeeting[]> {
-    const { data } = await api.get<GroupMeeting[]>("/groups/meetings/upcoming/");
-    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/components/notifications/PaceNotification.tsx

@@ -1,119 +0,0 @@
-import { useEffect, useState } from "react";
-import { useTranslation } from "react-i18n-lite";
-import { groupsApi } from "../api/groups";
-import type { PaceStatus } from "../types/notifications";
-
-interface PaceNotificationProps {
-  ebookId?: number;
-}
-
-export function PaceNotification({ ebookId }: PaceNotificationProps) {
-  const { t } = useTranslation();
-  const [paceItems, setPaceItems] = useState<PaceStatus[]>([]);
-  const [loading, setLoading] = useState(true);
-  const [dismissed, setDismissed] = useState<Set<string>>(new Set());
-
-  useEffect(() => {
-    const load = async () => {
-      try {
-        const data = await groupsApi.getPaceStatus(ebookId);
-        setPaceItems(data);
-      } catch {
-        // Silently fail — notifications are non-critical
-      } finally {
-        setLoading(false);
-      }
-    };
-    void load();
-  }, [ebookId]);
-
-  const handleDismiss = async (meetingId: number, itemEbookId: number) => {
-    const key = `${meetingId}-${itemEbookId}`;
-    setDismissed((prev) => new Set(prev).add(key));
-    try {
-      await groupsApi.dismissPaceNotification(meetingId, itemEbookId);
-    } catch {
-      // Best effort dismissal
-    }
-  };
-
-  if (loading || paceItems.length === 0) return null;
-
-  const visibleItems = paceItems.filter(
-    (p) => !dismissed.has(`${p.meeting_id}-${p.ebook_id}`),
-  );
-  if (visibleItems.length === 0) return null;
-
-  return (
-    <div style={{ display: "flex", flexDirection: "column", gap: 8, padding: "12px 0" }}>
-      {visibleItems.map((item) => {
-        const isBehind = item.status === "behind";
-        const isAhead = item.status === "ahead" || item.status === "completed";
-        const isOnTrack = item.status === "on_track";
-
-        const bgColor = isBehind ? "#fde8e8" : isAhead ? "#d4edda" : "#e8f4fd";
-        const borderColor = isBehind ? "#e74c3c" : isAhead ? "#27ae60" : "#3498db";
-        const textColor = isBehind ? "#a71d2a" : isAhead ? "#155724" : "#0c5460";
-
-        return (
-          <div
-            key={`${item.meeting_id}-${item.ebook_id}`}
-            style={{
-              background: bgColor,
-              border: `1px solid ${borderColor}`,
-              borderRadius: 8,
-              padding: "12px 16px",
-              display: "flex",
-              alignItems: "flex-start",
-              justifyContent: "space-between",
-              gap: 12,
-            }}
-          >
-            <div style={{ flex: 1 }}>
-              <div style={{ fontSize: 14, fontWeight: 600, color: textColor, marginBottom: 4 }}>
-                {isBehind
-                  ? `Behind schedule — catch up ${item.sections_to_catch_up} section${item.sections_to_catch_up !== 1 ? "s" : ""}`
-                  : isOnTrack
-                    ? "On track — keep going!"
-                    : item.status === "completed"
-                      ? "Meeting target completed!"
-                      : "Ahead of schedule — great job!"}
-              </div>
-              <div style={{ fontSize: 13, color: textColor, opacity: 0.85 }}>
-                {item.meeting_title || `Target: ${item.target_section_label || `Section ${item.target_section}`}`}
-                {" — "}
-                {item.ebook_title}
-              </div>
-              <div style={{ fontSize: 12, color: textColor, opacity: 0.7, marginTop: 2 }}>
-                {isBehind
-                  ? `Currently at section ${item.current_section}, need section ${item.target_section}`
-                  : `Section ${item.current_section} of ${item.target_section}`}
-                {item.days_until_meeting > 0 &&
-                  ` · ${item.days_until_meeting} day${item.days_until_meeting !== 1 ? "s" : ""} until meeting`}
-                {item.days_until_meeting === 0 && " · Meeting today"}
-              </div>
-            </div>
-            <button
-              type="button"
-              onClick={() => handleDismiss(item.meeting_id, item.ebook_id)}
-              style={{
-                background: "none",
-                border: "none",
-                color: textColor,
-                fontSize: 20,
-                cursor: "pointer",
-                padding: "0 4px",
-                lineHeight: 1,
-                opacity: 0.6,
-                flexShrink: 0,
-              }}
-              title="Dismiss"
-            >
-              ×
-            </button>
-          </div>
-        );
-      })}
-    </div>
-  );
-}

frontend/src/components/notifications/ReadingPaceBanner.tsx

@@ -1,71 +0,0 @@
-import { useEffect, useState } from "react";
-import { groupsApi } from "../../api/groups";
-import type { PaceStatus } from "../../types/notifications";
-
-interface ReadingPaceBannerProps {
-  ebookId: number;
-  currentSection: number;
-}
-
-export function ReadingPaceBanner({ ebookId, currentSection }: ReadingPaceBannerProps) {
-  const [paceItems, setPaceItems] = useState<PaceStatus[]>([]);
-
-  useEffect(() => {
-    const load = async () => {
-      try {
-        const data = await groupsApi.getPaceStatus(ebookId);
-        setPaceItems(data);
-      } catch {
-        // Silently fail
-      }
-    };
-    void load();
-  }, [ebookId, currentSection]);
-
-  if (paceItems.length === 0) return null;
-
-  // Only show if user is one section away from target
-  const relevantItems = paceItems.filter(
-    (p) => Math.abs(p.target_section - p.current_section) <= 1 && p.status !== "completed",
-  );
-
-  if (relevantItems.length === 0) return null;
-
-  return (
-    <div
-      style={{
-        background: "linear-gradient(135deg, #667eea 0%, #764ba2 100%)",
-        color: "#fff",
-        padding: "10px 16px",
-        fontSize: 13,
-        fontWeight: 500,
-        textAlign: "center",
-        display: "flex",
-        alignItems: "center",
-        justifyContent: "center",
-        gap: 8,
-        flexWrap: "wrap",
-        position: "sticky",
-        top: 0,
-        zIndex: 10,
-      }}
-    >
-      {relevantItems.map((item) => {
-        const isAlmostThere = item.sections_to_catch_up === 1;
-        const isAtTarget = item.sections_to_catch_up === 0;
-
-        return (
-          <span key={item.meeting_id}>
-            {isAtTarget
-              ? `You've reached the target for ${item.meeting_title || `Section ${item.target_section}`}!`
-              : isAlmostThere
-                ? `Almost there! Just 1 section to go for ${item.meeting_title || `Section ${item.target_section}`}.`
-                : `You should be on ${item.target_section_label || `Section ${item.target_section}`} by the upcoming meeting.`}
-            {item.days_until_meeting > 0 &&
-              ` (${item.days_until_meeting} day${item.days_until_meeting !== 1 ? "s" : ""} left)`}
-          </span>
-        );
-      })}
-    </div>
-  );
-}

frontend/src/components/reader/EpubReadingView.tsx

@@ -22,7 +22,6 @@ import { SelectionPopover } from "./SelectionPopover";
 import { BookMarkersPanel } from "./BookMarkersPanel";
 import { BookmarkReaderRail } from "./BookmarkReaderRail";
 import { ResumeReadingButton } from "./ResumeReadingButton";
-import { ReadingPaceBanner } from "../notifications/ReadingPaceBanner";
 import type { MarkerEntry } from "@/types";
 
 const ReaderToolbar = lazy(() => import("./ReaderToolbar"));
@@ -131,10 +130,6 @@ export function EpubReadingView({ book, bookId, initialEpubLocation }: EpubReadi
 
   return (
     <ReaderSuspenseShell theme={settings.theme}>
-        <ReadingPaceBanner
-          ebookId={bookId}
-          currentSection={tocItems.length > 0 ? Math.max(1, Math.ceil((progress / 100) * tocItems.length)) : 0}
-        />
         <ReaderToolbar
           bookTitle={book.title}
           chapterTitle={chapterTitle || t("reader.reading")}

frontend/src/components/reader/PdfReadingView.tsx

@@ -24,7 +24,6 @@ import { BookmarkReaderRail } from "./BookmarkReaderRail";
 import { ResumeReadingButton } from "./ResumeReadingButton";
 import { PdfLimitationsNotice } from "./PdfLimitationsNotice";
 import { PdfViewer } from "./PdfViewer";
-import { ReadingPaceBanner } from "../notifications/ReadingPaceBanner";
 import type { MarkerEntry } from "@/types";
 
 const ReaderToolbar = lazy(() => import("./ReaderToolbar"));
@@ -171,10 +170,6 @@ export function PdfReadingView({ book, bookId, initialAnchor }: PdfReadingViewPr
 
   return (
     <ReaderSuspenseShell theme={settings.theme}>
-        <ReadingPaceBanner
-          ebookId={bookId}
-          currentSection={currentPage}
-        />
         <ReaderToolbar
           bookTitle={book.title}
           chapterTitle={chapterTitle || t("reader.reading")}

frontend/src/pages/Library.tsx

@@ -19,7 +19,6 @@ import { useVoiceSearch } from "../hooks/useVoiceSearch";
 import { useMediaQuery, BREAKPOINTS } from "../hooks/useMediaQuery";
 import { SearchSuggestions } from "../components/search/SearchSuggestions";
 import { BookContextMenu } from "../components/BookContextMenu";
-import { PaceNotification } from "../components/notifications/PaceNotification";
 
 interface FilterState {
   genre: string;
@@ -257,9 +256,6 @@ export function LibraryPage() {
         </div>
       </header>
 
-      {/* Pace Notifications */}
-      <PaceNotification />
-
       {/* Search Bar */}
       <div style={{ marginBottom: 16 }}>
         <div style={{ display: "flex", gap: 8, alignItems: "center" }}>

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/pages/Settings.tsx

@@ -2,9 +2,7 @@ import { useEffect, useState } from "react";
 import { useNavigate } from "react-router-dom";
 import { useTranslation } from "react-i18n-lite";
 import { booksApi } from "../api/books";
-import { groupsApi } from "../api/groups";
 import type { ReadingSettings } from "../types/book";
-import type { NotificationPreferences } from "../types/notifications";
 import type { SupportedLanguage } from "../locales";
 import { SimpleFormPageLayout } from "../components/layout/SimpleFormPageLayout";
 
@@ -19,7 +17,6 @@ export function SettingsPage() {
   const { t, language, setLanguage } = useTranslation();
   const navigate = useNavigate();
   const [settings, setSettings] = useState<ReadingSettings | null>(null);
-  const [notifPrefs, setNotifPrefs] = useState<NotificationPreferences | null>(null);
   const [loading, setLoading] = useState(true);
   const [saving, setSaving] = useState(false);
   const [error, setError] = useState<string | null>(null);
@@ -27,14 +24,7 @@ export function SettingsPage() {
 
   useEffect(() => {
     const load = async () => {
-      try {
+      try { const data = await booksApi.getSettings(); setSettings(data); }
-        const [data, notifData] = await Promise.all([
-          booksApi.getSettings(),
-          groupsApi.getPreferences(),
-        ]);
-        setSettings(data);
-        setNotifPrefs(notifData);
-      }
       catch (err) { setError(err instanceof Error ? err.message : t("settings.loadFailed")); }
       finally { setLoading(false); }
     };
@@ -42,15 +32,9 @@ export function SettingsPage() {
   }, [t]);
 
   const handleSave = async () => {
-    if (!settings || !notifPrefs) return;
+    if (!settings) return;
     setSaving(true); setError(null); setSuccess(false);
-    try {
+    try { await booksApi.updateSettings(settings); setSuccess(true); setTimeout(() => setSuccess(false), 2000); }
-      await Promise.all([
-        booksApi.updateSettings(settings),
-        groupsApi.updatePreferences(notifPrefs),
-      ]);
-      setSuccess(true); setTimeout(() => setSuccess(false), 2000);
-    }
     catch (err) { setError(err instanceof Error ? err.message : t("settings.saveFailed")); }
     finally { setSaving(false); }
   };
@@ -101,48 +85,6 @@ export function SettingsPage() {
           </div>
         </>}
 
-        {notifPrefs && <>
-          <div style={{ borderTop: "1px solid #e5e7eb", paddingTop: 20 }}>
-            <h3 style={{ fontSize: 16, fontWeight: 600, color: "#1f2937", marginBottom: 16 }}>
-              Notification Settings
-            </h3>
-
-            <div style={{ display: "flex", flexDirection: "column", gap: 12 }}>
-              <label style={{ display: "flex", alignItems: "center", gap: 10, fontSize: 14, color: "#374151", cursor: "pointer" }}>
-                <input
-                  type="checkbox"
-                  checked={notifPrefs.pace_notifications_enabled}
-                  onChange={(e) => setNotifPrefs({ ...notifPrefs, pace_notifications_enabled: e.target.checked })}
-                  style={{ width: 18, height: 18, cursor: "pointer" }}
-                />
-                Enable pace notifications
-              </label>
-
-              <label style={{ display: "flex", alignItems: "center", gap: 10, fontSize: 14, color: "#374151", cursor: "pointer" }}>
-                <input
-                  type="checkbox"
-                  checked={notifPrefs.reminder_enabled}
-                  onChange={(e) => setNotifPrefs({ ...notifPrefs, reminder_enabled: e.target.checked })}
-                  style={{ width: 18, height: 18, cursor: "pointer" }}
-                />
-                Enable pre-meeting reminders (24h before)
-              </label>
-
-              <div style={{ display: "flex", flexDirection: "column", gap: 8 }}>
-                <label style={{ fontSize: 14, fontWeight: 600, color: "#555" }}>Notification frequency</label>
-                <select
-                  value={notifPrefs.frequency}
-                  onChange={(e) => setNotifPrefs({ ...notifPrefs, frequency: e.target.value as NotificationPreferences["frequency"] })}
-                  style={{ padding: "10px 12px", borderRadius: 6, border: "1px solid #ddd", fontSize: 16, background: "#fff", outline: "none" }}
-                >
-                  <option value="daily">Daily</option>
-                  <option value="weekly">Weekly</option>
-                </select>
-              </div>
-            </div>
-          </div>
-        </>}
-
         <button onClick={handleSave} disabled={saving} style={{ padding: "12px 24px", borderRadius: 8, border: "none", background: "#1a1a2e", color: "#fff", fontSize: 16, fontWeight: 600, cursor: "pointer", opacity: saving ? 0.6 : 1, marginTop: 8 }}>{saving ? t("common.saving") : t("settings.saveSettings")}</button>
       </div>
     </SimpleFormPageLayout>

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/notifications.ts

@@ -1,65 +0,0 @@
-export interface PaceStatus {
-  meeting_id: number;
-  meeting_title: string;
-  scheduled_at: string;
-  target_section: number;
-  target_section_label: string;
-  current_section: number;
-  ahead_behind_delta: number;
-  status: "ahead" | "behind" | "on_track" | "completed";
-  days_until_meeting: number;
-  sections_to_catch_up: number;
-  ebook_id: number;
-  ebook_title: string;
-}
-
-export interface NotificationPreferences {
-  pace_notifications_enabled: boolean;
-  reminder_enabled: boolean;
-  frequency: "daily" | "weekly";
-}
-
-export interface MeetingReminder {
-  meeting_id: number;
-  meeting_title: string;
-  scheduled_at: string;
-  target_section: number;
-  target_section_label: string;
-  group_name: string;
-  hours_until: number;
-  ebook_id: number;
-  ebook_title: string;
-}
-
-export interface ReadingGroup {
-  id: number;
-  name: string;
-  description: string;
-  book: number | null;
-  ebook: number | null;
-  created_by: number;
-  created_at: string;
-  member_count: number;
-  meeting_count: number;
-}
-
-export interface GroupMeeting {
-  id: number;
-  group: number;
-  group_name: string;
-  title: string;
-  scheduled_at: string;
-  target_section: number;
-  target_section_label: string;
-  created_at: string;
-}
-
-export interface GroupMembership {
-  id: number;
-  user: number;
-  user_email: string;
-  group: number;
-  group_name: string;
-  role: "admin" | "member";
-  joined_at: string;
-}