sidebar-resizer 추가

AGENTS.md

@@ -34,7 +34,8 @@ src/
 │       ├── file-utils.js # Shared main-process file helpers: image listing/data URLs,
 │       │                 # exists check, EXDEV-safe move/copy fallback
 │       ├── folder.js     # select-folder, list-directories, get/set-last-folder,
-│       │                 # get/set-preview-on, get-home-dir, reveal-folder
+│       │                 # get/set-preview-on, get/set-sidebar-width,
+│       │                 # get-home-dir, reveal-folder
 │       └── files.js      # list-images, read-image, rename-files, stage/restore-delete,
 │                         # check-files-exist, move-files
 ├── preload/
@@ -63,6 +64,7 @@ src/
         │   ├── auto-scroll.js # Drag auto-scroll helper
         │   └── ghost.js       # Drag ghost UI helper
         ├── file-explorer.js  # Sidebar directory tree (lazy-load, expand/collapse)
+        ├── sidebar-resize.js # Pointer-drag resizing for the aside/main split; persisted 340–500px width
         ├── selection.js      # Rubber-band, Shift-click, Cmd+click, resetAnchor
         ├── pinch-zoom.js     # Ctrl+scroll to resize thumbnails (CSS --thumb-size, 150–400px)
         └── image-preview.js  # Hover preview overlay with circular loading indicator
@@ -86,6 +88,7 @@ Defined in `src/main/ipc/`, bridged via `src/preload/index.js` as `window.api`:
 | `get-home-dir` | invoke | Returns `os.homedir()` |
 | `get-last-folder` / `set-last-folder` | invoke | Persists last opened folder in userData config.json |
 | `get-preview-on` / `set-preview-on` | invoke | Persists hover preview toggle state in userData config.json |
+| `get-sidebar-width` / `set-sidebar-width` | invoke | Persists sidebar width in userData config.json |
 | `reveal-folder` | invoke | Opens folder in Finder via `shell.openPath` |
 | `fullscreen-change` | push (main→renderer) | Sent on `enter-full-screen` / `leave-full-screen` window events |