Initial commit: AI Photo Organizer (Electron + face-api)

Local-first photo organizer that auto-sorts images by face recognition
and EXIF capture date.

- Electron app with 3-process split: Main (Node) / UI Renderer (React) /
  hidden Inference Renderer (face-api + WebGL)
- Core pipeline: scan -> face match + EXIF -> path build -> atomic move/copy
- Move = copy -> verify -> delete; auto-rename on filename collision
- 1st-registered profile = move, others = copy; unmatched -> [미정]/YYYY/MM
- EXIF date with mtime fallback
- Vitest unit tests (pathBuilder / fileOps / concurrency) all green
- electron-builder config for Windows (nsis) + macOS (dmg)
- Docs: PRD / DECISIONS / ARCHITECTURE

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/shared/constants.ts

@@ -0,0 +1,50 @@
+// 전 프로세스 공유 상수
+
+/** 처리 대상 이미지 확장자 (소문자, 점 포함) */
+export const SUPPORTED_EXTENSIONS = ['.jpg', '.jpeg', '.png', '.webp'] as const
+
+/** 미검출/인식실패 사진이 들어가는 폴더명 */
+export const UNMATCHED_FOLDER = '[미정]'
+
+/** 로그 폴더명 (출력 루트 하위) */
+export const LOG_FOLDER = '_PhotoAI_logs'
+
+/** 프로필 영속화 파일명 (userData 하위) */
+export const PROFILE_STORE_FILE = 'profiles.json'
+
+/** 최대 프로필 인원 (PRD) */
+export const MAX_PROFILES = 3
+
+/** 기본 잡 옵션 */
+export const DEFAULT_JOB_OPTIONS = {
+  matchThreshold: 0.5,
+  concurrency: 3,
+  detector: 'ssd' as const
+}
+
+/** 추론 시 이미지 장변 최대 픽셀 (다운스케일 기준) */
+export const MAX_IMAGE_DIMENSION = 1024
+
+/** IPC 채널명 */
+export const IPC = {
+  // UI → Main (invoke)
+  PROFILES_LIST: 'profiles:list',
+  PROFILES_UPSERT: 'profiles:upsert',
+  PROFILES_REMOVE: 'profiles:remove',
+  PROFILES_ADD_REFERENCE: 'profiles:addReference',
+  DIALOG_PICK_SOURCE: 'dialog:pickSource',
+  DIALOG_PICK_OUTPUT: 'dialog:pickOutput',
+  DIALOG_PICK_IMAGES: 'dialog:pickImages',
+  JOB_RUN: 'job:run',
+  JOB_CANCEL: 'job:cancel',
+  // Main → UI (send)
+  JOB_PROGRESS: 'job:progress',
+  JOB_FILE_PROCESSED: 'job:fileProcessed',
+  JOB_DONE: 'job:done',
+  JOB_ERROR: 'job:error',
+  // Main ↔ Inference
+  INFER_READY: 'infer:ready',
+  INFER_DETECT: 'infer:detect',
+  INFER_DESCRIBE: 'infer:describe',
+  INFER_INIT: 'infer:init'
+} as const