Feat: File filter

README.md

@@ -10,6 +10,7 @@ Visualize code references as an interactive graph.
 - **Symbol Highlighting**: The referenced symbol is highlighted within each code snippet
 - **Smart Layout**: Automatic graph layout using ELKjs that considers node sizes
 - **Search**: Press `Cmd/Ctrl+F` to search nodes by symbol name or file path
+- **File Filtering**: Filter nodes by file path using glob patterns (e.g., `src/**/*.ts`, `**/test/**`)
 - **Click to Navigate**: Click any node to jump to that location in your editor
 
 ## Usage
@@ -24,6 +25,14 @@ Visualize code references as an interactive graph.
 2. Select "Show File Reference Graph"
 3. The graph shows all files that import the selected file
 
+### Filtering Nodes
+Use the filter panel (top-left) to focus on specific files:
+- **Files to include**: Show only matching files (e.g., `src/**/*.ts`)
+- **Files to exclude**: Hide matching files (e.g., `**/node_modules/**`)
+- **Hide filtered nodes**: Toggle to completely remove non-matching nodes (instead of dimming them)
+
+Patterns use glob syntax — `**` matches any directory depth, `*` matches any filename.
+
 ## Keyboard Shortcuts
 
 | Shortcut | Action |