docs: remove Phase X placeholders from API documentation

Clean up API documentation files by removing Phase X references:

Remove 'API Explorer will be inserted here in Phase X' placeholders from:
- 70+ API endpoint documentation files
- Authentication endpoints (login, logout, register, refresh)
- User endpoints (profile, settings, password)
- Device endpoints (registration, sync, shelves)
- Library endpoints (CRUD, folders, visibility)
- Media endpoints (items, progress, highlights, notes)
- Admin endpoints (users, analytics)
- Sync endpoints (Kobo, KOReader)
- OPDS endpoints
- Scanner endpoints
- Queue endpoints

These placeholders were from planning documents and have no meaning
to API consumers. The documentation is now clean and ready for use.

docs/developer/api/libraries/add_library_folder.md

@@ -45,7 +45,3 @@ Add a folder to an existing library (Admin only).
 | 401 | Invalid or expired token |
 | 403 | User is not an admin |
 | 404 | Library not found |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/create_library.md

@@ -43,7 +43,3 @@ Create a new library (Admin only).
 | 400 | Invalid input data |
 | 401 | Invalid or expired token |
 | 403 | User is not an admin |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/delete_library.md

@@ -35,7 +35,3 @@ Library deleted successfully.
 | 401 | Invalid or expired token |
 | 403 | User does not have admin privileges |
 | 404 | Library not found |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/delete_library_folder.md

@@ -38,7 +38,3 @@ Library folder deleted successfully.
 | 401 | Invalid or expired token |
 | 403 | User does not have admin privileges |
 | 404 | Library or folder not found |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/get_library.md

@@ -49,7 +49,3 @@ Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
 | 401 | Invalid or expired token |
 | 403 | User does not have access to this library |
 | 404 | Library not found |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/get_library_media_items.md

@@ -59,7 +59,3 @@ Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
 | 401 | Invalid or expired token |
 | 403 | User does not have admin privileges |
 | 404 | Library not found |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/get_library_stats.md

@@ -48,7 +48,3 @@ Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
 | 401 | Invalid or expired token |
 | 403 | User does not have admin privileges |
 | 404 | Library not found |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/get_visible_libraries.md

@@ -39,7 +39,3 @@ Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
 | Code | Description |
 |------|-------------|
 | 401 | Invalid or expired token |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/set_library_visibility.md

@@ -42,7 +42,3 @@ Set library visibility for a specific user (Admin only).
 | 401 | Invalid or expired token |
 | 403 | User is not an admin |
 | 404 | User or library not found |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->

docs/developer/api/libraries/update_library.md

@@ -48,7 +48,3 @@ Update a library's information.
 | 401 | Invalid or expired token |
 | 403 | User does not have admin privileges |
 | 404 | Library not found |
-
-## Try It Out
-
-<!-- API Explorer will be inserted here in Phase 3 -->