feat: photo sync (iCloud + Amazon import), larger gear icon, Luma branding

- Settings: iCloud Photos section with icloudpd-backed sync — Apple ID,
  password, download path, cookie dir, live log output via SSE
- Settings: Amazon Photos one-time import — path to extracted data export,
  Add & Index button wires it directly into Watch Folders
- scripts/amazon_sync.py: stdlib-only downloader using Netscape cookie file
- server: POST /api/sync/icloud, /api/sync/amazon, GET /api/sync/stream
  (SSE log streaming matching ingest stream pattern)
- db: icloud/amazon setting keys; getSettings handles bool + string fields
- Gear icon: fontSize 16→20, button 38×38, color #555→#888
- favicon.svg: 6-blade aperture icon in Luma blue
- Browser tab title: shpm → Luma
- Dockerfile: installs icloudpd via pip3, copies scripts/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -13,7 +13,8 @@ RUN npm run build
 # ── Stage 2: runtime ─────────────────────────────────────────────────────────
 FROM node:22-alpine
 
-RUN apk add --no-cache python3 make g++
+RUN apk add --no-cache python3 py3-pip make g++ && \
+    pip3 install icloudpd --break-system-packages
 
 WORKDIR /app
 
@@ -24,6 +25,7 @@ RUN npm ci --omit=dev
 COPY --from=builder /app/dist ./dist
 COPY worker ./worker
 COPY server ./server
+COPY scripts ./scripts
 
 ENV PORT=3000 \
     DB_PATH=/data/library.db \