Add authentication improvements and search functionality

- Implement anonymous access control with ALLOW_ANONYMOUS_ACCESS env var
- Add complete password reset workflow with token-based validation
- Add username recovery functionality for better UX
- Implement full-text search API with relevance scoring and highlighting
- Add Docker compatibility improvements with permission handling and fallback storage
- Add quick stats API for real-time dashboard updates
- Improve security with proper token expiration and input validation
- Add search result pagination and navigation
- Enhance error handling and logging throughout the application

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

templates/login.html

@@ -55,6 +55,11 @@
 
         <div class="auth-footer">
             <p>Don't have an account? <a href="{{ url_for('signup') }}">Sign up</a></p>
+            <div class="auth-links">
+                <a href="{{ url_for('forgot_username') }}">Forgot username?</a>
+                <span>·</span>
+                <a href="{{ url_for('forgot_password') }}">Forgot password?</a>
+            </div>
         </div>
     </div>
 </div>