사이드바 너비, 카드 크기 정보 저장, 앱 실행시 적용 + 개발 모드 실행시 로그 출력

AGENTS.md

@@ -35,7 +35,7 @@ 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/set-sidebar-width,
+│       │                 # get/set-preview-on, get/set-sidebar-width, get/set-thumb-size,
 │       │                 # get-home-dir, reveal-folder
 │       └── files.js      # list-images, read-image, rename-files, stage/restore-delete,
 │                         # check-files-exist, move-files
@@ -90,6 +90,7 @@ Defined in `src/main/ipc/`, bridged via `src/preload/index.js` as `window.api`:
 | `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 |
+| `get-thumb-size` / `set-thumb-size` | invoke | Persists thumbnail/card size 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 |
 
@@ -184,10 +185,12 @@ Global shortcuts are registered in `keyboard.js`. They do not fire while any `.m
 
 **Sidebar tree** (`file-explorer.js`): Lazy-load 자식 폴더. 접근 불가 폴더는 `null` 반환 → "접근 불가" 표시. 행 클릭 시 항상 펼침, 화살표 클릭 시 토글.
 
+**Thumbnail size** (`pinch-zoom.js`): Ctrl+scroll changes CSS `--thumb-size` in the 150–400px range. The latest size is persisted as `thumbSize` in config.json and restored on startup without showing the size hint.
+
 **Styling:** CSS는 `src/renderer/style.css`에 집중. Dark theme, CSS variables in `:root`. macOS traffic-light은 `header`의 `-webkit-app-region: drag`. Avoid inline styles in `index.html`; use small semantic classes such as `.format-arrow`, `.empty-state-hint`, and modal title variants.
 
 **App icon:** 소스는 `assets/icon.png` (2048×2048). `assets/icon.icns`는 10개 해상도(16px~1024px@2x)를 포함하며 electron-builder가 사용. `app.setName('Photo Renamer')`로 개발 모드 메뉴바 이름도 지정.
 
 **Build output:** `electron-builder` targets DMG for arm64 and x64.
 
-**Config persistence:** `app.getPath('userData')/config.json`에 `lastFolder`, `previewOn`, `sidebarWidth`, `windowState` 저장. `windowState` includes fullscreen status and normal window bounds (`x`, `y`, `width`, `height`) and is restored on startup if the saved bounds overlap an available display.
+**Config persistence:** `app.getPath('userData')/config.json`에 `lastFolder`, `previewOn`, `sidebarWidth`, `thumbSize`, `windowState` 저장. `windowState` includes fullscreen status and normal window bounds (`x`, `y`, `width`, `height`) and is restored on startup if the saved bounds overlap an available display.