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/.env.local.example

@@ -0,0 +1,11 @@
+# Plant Disease Identification — Environment Variables
+# Copy this file to .env.local and fill in real values.
+
+# Path to compiled ML model files (relative to public/)
+NEXT_PUBLIC_MODEL_PATH=/models
+
+# (Future) API key for external plant disease databases
+# PLANT_ID_API_KEY=
+
+# (Future) OpenAI / vision model API key for image analysis
+# OPENAI_API_KEY=