feat: full health & fitness app with workout/meal planning

- Login/register with JWT auth
- User profile (age, weight, height, goal, country)
- AI trainer agent: 7-day workout programs by goal
- AI dietitian agent: calorie-based meal plans with Turkish cuisine
- Shopping list generator from meal plans
- Modern Turkish UI (SPA)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -1,6 +1,7 @@
 # Stage 1: Install dependencies
 FROM node:20-alpine AS deps
 WORKDIR /app
+RUN apk add --no-cache python3 make g++
 COPY package.json package-lock.json* ./
 RUN npm ci --omit=dev && npm cache clean --force
 
@@ -10,7 +11,8 @@ ENV NODE_ENV=production
 WORKDIR /app
 
 RUN addgroup -g 1001 -S appgroup && \
-    adduser -u 1001 -S appuser -G appgroup
+    adduser -u 1001 -S appuser -G appgroup && \
+    mkdir -p /tmp/health-app && chown appuser:appgroup /tmp/health-app
 
 COPY --from=deps /app/node_modules ./node_modules
 COPY src ./src