docs: update README with search feature documentation

- Document search capabilities in Media Management section
- Add API endpoint documentation for /api/media-items/search
- Include search behavior, ranking, and examples
- Document fuzzy search fallback for typos

README.md

@@ -44,6 +44,12 @@ A modern self-hosted media library system built with Go, PostgreSQL, HTMX, and T
  - **Universal Media Support**: Single system for all media types with unified interface
  - **Rich Metadata**: Automatic extraction of title, author, series, publisher, ISBN, tags
  - **ISBN Normalization**: Automatic ISBN format normalization (removes hyphens and spaces) supporting ISBN-10 and ISBN-13 formats
+ - **Advanced Search**: 
+   - Partial matching search across title, author, series, tags, and contributors
+   - Automatic fuzzy search fallback when no partial matches found (handles typos and misspellings)
+   - Real-time search results with highlighted matches
+   - Keyboard navigation (↑↓ arrows, Enter to select, Escape to close)
+   - Respects library visibility settings
  - **Advanced Rating**: 5-star system with half-star precision (1-10 scale)
  - **Reading Progress**: User-specific progress tracking with current page and total pages
  - **Notes & Highlights**: Personal annotations and text highlighting with color customization
@@ -144,6 +150,30 @@ PUT /api/ebooks/{id}/highlights/{highlightId}       # Update ebook highlight
 DELETE /api/ebooks/{id}/highlights/{highlightId}   # Delete ebook highlight
  ```
 
+#### Media Search (All Authenticated Users)
+```bash
+# Search media items across all visible libraries
+GET /api/media-items/search?q={query}
+
+# Query Parameters:
+# q (required): Search query (minimum 2 characters)
+# - Searches across: title, author, series, tags, contributors
+# - Partial matching: Case-insensitive substring search
+# - Fuzzy fallback: Automatic when no partial matches found
+# - Results ranked by relevance
+
+# Examples:
+GET /api/media-items/search?q=harry%20potter    # Search by title
+GET /api/media-items/search?q=rowling          # Search by author
+GET /api/media-items/search?q=hary%20poter     # Fuzzy search (handles typos)
+
+# Response:
+# - 200: Success (returns array of media items)
+# - 404: No results found
+# - 400: Missing or invalid query parameter
+# - 401: Unauthorized
+```
+
 #### Library Management (Admin Only)
 ```bash
 # Create new library