feat: uv config other feats

- add uv configuration for the backend
- update frontend to make auth work
- add new auth endpoints
- add bookmars feat
- add reader feat

docs/frontend/012-library-context-menu.md

@@ -0,0 +1,56 @@
+# 012 — Library book context menu
+
+**Status:** Implemented  
+**Created:** 2026-06-03
+
+## Objective
+
+Add a custom right-click context menu on each book card in the library with **Sync metadata** (Open Library refresh) and **Remove** (delete from library). Show toast notifications for success, warning, and error outcomes.
+
+## Architecture
+
+```
+Library book card (contextmenu)
+  → BookContextMenu
+    → Sync metadata: POST /api/books/ebooks/{id}/enrich-metadata/
+    → Remove: confirm dialog → DELETE /api/books/ebooks/{id}/
+  → ToastProvider (app-wide) → success | warning | error toasts
+```
+
+Backend endpoints already exist; no API changes required.
+
+## Frontend changes
+
+| File | Change |
+|------|--------|
+| `api/books.ts` | `enrichEBookMetadata(id)` → `POST .../enrich-metadata/` |
+| `types/book.ts` | `OpenLibraryMetadata` with `match_status` |
+| `hooks/useToast.tsx` | `ToastProvider`, `showToast({ message, variant })`, auto-dismiss ~4s |
+| `components/ToastContainer.tsx` | Fixed bottom-right toast stack |
+| `components/BookContextMenu.tsx` | Positioned menu; sync + remove actions |
+| `pages/Library.tsx` | `onContextMenu` on cards; local state updates |
+| `App.tsx` | Wrap routes with `ToastProvider` |
+
+## Context menu behavior
+
+- Opens on right-click (`contextmenu`); browser default menu suppressed
+- Position clamped to viewport; closes on outside click, Escape, or scroll
+- **Sync metadata:** updates card title/author/cover from response; toast by `metadata.match_status`:
+  - `matched` → success
+  - `not_found` → warning
+  - other → neutral success
+- **Remove:** `window.confirm` before delete; removes card from list on success
+- Menu clicks do not trigger card navigation to reader
+
+## Dependencies
+
+None (no new npm packages).
+
+## Verification
+
+1. Right-click a book → menu appears at cursor
+2. Sync metadata on a matched book → cover/title may update, success toast
+3. Sync on unmatched book → warning toast, no crash
+4. Remove → confirm → book disappears, success toast
+5. Cancel remove → book stays, menu closes
+6. Left-click still opens reader (EPUB) or PDF notice