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>

src/server.js

@@ -1,6 +1,12 @@
 "use strict";
 
 const express = require("express");
+const path = require("path");
+const { getDb } = require("./database");
+
+const authRoutes = require("./routes/auth");
+const profileRoutes = require("./routes/profile");
+const programRoutes = require("./routes/program");
 
 const app = express();
 const PORT = parseInt(process.env.PORT, 10) || 3000;
@@ -8,14 +14,17 @@ const startTime = Date.now();
 
 app.disable("x-powered-by");
 
-app.get("/", (_req, res) => {
-  res.json({
-    service: "health-app",
-    version: process.env.APP_VERSION || "1.0.0",
-    environment: process.env.NODE_ENV || "development",
-  });
-});
+// Body parsing
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
 
+// Static files
+app.use(express.static(path.join(__dirname, "public")));
+
+// Initialize database on startup
+getDb();
+
+// Health & readiness probes (Kubernetes)
 app.get("/health", (_req, res) => {
   res.json({
     status: "healthy",
@@ -26,16 +35,36 @@ app.get("/health", (_req, res) => {
 });
 
 app.get("/ready", (_req, res) => {
-  res.json({ ready: true });
+  try {
+    getDb();
+    res.json({ ready: true });
+  } catch (err) {
+    res.status(503).json({ ready: false, error: err.message });
+  }
 });
 
-app.use((_req, res) => {
-  res.status(404).json({ error: "Not Found" });
+// API routes
+app.use("/api/auth", authRoutes);
+app.use("/api/profile", profileRoutes);
+app.use("/api/program", programRoutes);
+
+// SPA fallback - serve index.html for non-API routes
+app.get("*", (req, res) => {
+  if (req.path.startsWith("/api/")) {
+    return res.status(404).json({ error: "API endpoint bulunamadı" });
+  }
+  res.sendFile(path.join(__dirname, "public", "index.html"));
 });
 
+// 404 handler for API
+app.use((req, res) => {
+  res.status(404).json({ error: "Bulunamadı" });
+});
+
+// Error handler
 app.use((err, _req, res, _next) => {
   console.error("Unhandled error:", err.message);
-  res.status(500).json({ error: "Internal Server Error" });
+  res.status(500).json({ error: "Sunucu hatası" });
 });
 
 const server = app.listen(PORT, "0.0.0.0", () => {