docs: update comprehensive API documentation and project guides

This commit updates all documentation files throughout the project:

- Updated IMPLEMENTATION_PLAN.md with new implementation details
- Updated PROJECT_GUIDELINES.md with coding standards and practices
- Updated README.md with current project information
- Updated SCREENSHOT_AUTOMATION.md with new automation details
- Added TEST_DATA.md with test fixtures data
- Updated cover_image_serving_plan.md with static URL patterns

Documentation API updates:
- Updated API reference documentation for all endpoints including:
  - Authentication (login, logout, register, refresh_token)
  - Book matching (auto_link, bulk_link, link_book, search)
  - Collections (CRUD operations, shelf mappings, auto-assign rules)
  - Conflicts (bulk operations, resolve/dismiss)
  - Devices (registration, approval, shelf management)
  - Highlights (create, update, delete, get)
  - Kobo sync (bookmark, markup, initialization, sync)
  - KOReader sync (library, metadata, bookmarks, progress)
  - Libraries (CRUD, folders, media items, stats)
  - Media items (bulk operations, CRUD)
  - Notes (CRUD operations)
  - OPDS (acquisition, feeds, publication)
  - Progress (reading progress tracking)
  - Queue (device queue management)
  - Ratings (star ratings)
  - Scanner (watch mode, scan operations)
  - Sync protocols (Kobo, KOReader)
  - Users (profile, password, admin operations)
  - WebSocket protocols

- Updated user guides (admin, dashboard, settings, sync)
- Updated device setup guides (Kobo, KOReader)
- Updated developer guides (testing, contributing, operations)
- Updated scripts/README.md

docs/developer/api/collections/create_shelf_mapping.md

@@ -8,26 +8,26 @@ Map a collection to a device shelf for syncing.
 
 ## Path Parameters
 
-| Parameter | Type | Required | Description |
-|-----------|------|-----------|-------------|
-| deviceId | string (UUID) | Yes | Device UUID |
+| Parameter | Type          | Required | Description |
+| --------- | ------------- | -------- | ----------- |
+| deviceId  | string (UUID) | Yes      | Device UUID |
 
 ## Request Body
 
-| Field | Type | Required | Description |
-|--------|------|-----------|-------------|
-| collection_id | string (UUID) | Yes | Collection UUID to map |
-| device_shelf_name | string | Yes | Name of the shelf on the device |
-| sync_direction | string | No | Sync direction (default: "bidirectional") |
+| Field             | Type          | Required | Description                               |
+| ----------------- | ------------- | -------- | ----------------------------------------- |
+| collection_id     | string (UUID) | Yes      | Collection UUID to map                    |
+| device_shelf_name | string        | Yes      | Name of the shelf on the device           |
+| sync_direction    | string        | No       | Sync direction (default: "bidirectional") |
 
 ### Sync Directions
 
-| Direction | Description |
-|-----------|-------------|
-| bidirectional | Sync both ways between Bookhoard and device |
-| book_to_hoard | Bookhoard → Device only |
-| device_to_hoard | Device → Bookhoard only |
-| none | No sync (mapping only for reference) |
+| Direction       | Description                                 |
+| --------------- | ------------------------------------------- |
+| bidirectional   | Sync both ways between Bookhoard and device |
+| book_to_hoard   | Bookhoard → Device only                     |
+| device_to_hoard | Device → Bookhoard only                     |
+| none            | No sync (mapping only for reference)        |
 
 ### Example Request
 
@@ -58,12 +58,12 @@ Collections can be synced to device-specific shelves (Kobo, KOReader). This allo
 
 ## Error Responses
 
-| Code | Description |
-|------|-------------|
-| 400 | Invalid request (validation failed) |
-| 401 | Authentication required |
-| 404 | Device or collection not found |
-| 409 | Mapping already exists |
-| 500 | Internal server error |
+| Code | Description                         |
+| ---- | ----------------------------------- |
+| 400  | Invalid request (validation failed) |
+| 401  | Authentication required             |
+| 404  | Device or collection not found      |
+| 409  | Mapping already exists              |
+| 500  | Internal server error               |
 
 ## Try It Out