Initial commit: Plant Disease Identification app

- Next.js 16 App Router project with Tailwind CSS
- Plant disease knowledge base (93 diseases, 25 plants)
- Image upload with client+server preprocessing
- ML inference pipeline with mock/demo fallback
- Responsive results page with disease cards and treatment
- Full test suite (285 passing tests)

apps/web/vercel.json

@@ -0,0 +1,24 @@
+{
+  "framework": "nextjs",
+  "functions": {
+    "src/app/api/**/*.ts": {
+      "maxDuration": 30
+    }
+  },
+  "regions": ["iad1"],
+  "headers": [
+    {
+      "source": "/(.*)",
+      "headers": [
+        {
+          "key": "X-Content-Type-Options",
+          "value": "nosniff"
+        },
+        {
+          "key": "X-Frame-Options",
+          "value": "DENY"
+        }
+      ]
+    }
+  ]
+}