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/014-library-reading-progress.md

@@ -0,0 +1,46 @@
+# 014 — Library reading progress badges
+
+**Status:** Implemented  
+**Created:** 2026-06-04
+
+## Objective
+
+Show accurate reading state on library book cards using saved EPUB progress instead of always displaying "Want to Read" (`Quiero leer`).
+
+## Data source
+
+- `GET /api/books/ebooks/` returns `progress` (0–100) from `ReadingProgress.current_position` via `EBookListSerializer.get_progress`.
+- Progress is updated by the web reader (`useEpubReader` → `PATCH .../progress/`).
+
+## Display rules
+
+| Progress | `opened` | Badge | Cover extra |
+|----------|----------|-------|-------------|
+| `null` or `0` | false | Want to Read | — |
+| `0` | true | Opened | — |
+| `1–98` | — | Reading · N% | Green progress bar on cover |
+| `≥ 99` | — | Finished | — |
+
+**Opened** is set when the reader first displays (CFI saved, 0% progress). Turning pages moves to **Reading**.
+
+Threshold constant: `FINISHED_PROGRESS_THRESHOLD = 99` in `frontend/src/utils/libraryStatus.ts`.
+
+## Frontend changes
+
+| File | Change |
+|------|--------|
+| `utils/libraryStatus.ts` | `deriveReadingStatus`, `normalizeProgressPercent` |
+| `pages/Library.tsx` | Map API progress → status; badge labels; client-side status filter |
+| `locales/en-US.ts`, `es-ES.ts` | `library.readingStatus.readingWithProgress` |
+| `pages/Library.module.css` | Cover progress bar styles |
+
+## Status filter
+
+The reading-status filter in the library panel now filters client-side by derived status (`want_to_read`, `reading`, `finished`).
+
+## Verification
+
+1. New upload → **Want to Read** / **Quiero leer**
+2. Partial read → **Reading · N%** + progress bar
+3. Near end (≥ 99%) → **Finished** / **Terminado**
+4. Filters by Leyendo / Terminado work as expected