Fix Docker and install files for current codebase

- Fix backend Dockerfile: install deps before copying source for
  proper layer caching (non-editable install)
- Add ai_insights, ai_score, ai_score_reason, ai_cost_usd columns
  to initial Alembic migration so fresh Docker deploys have full schema
- Add ANTHROPIC_API_KEY to docker-compose.yml, docker-compose.dev.yml,
  and .env.example
- Remove accidental backend/=0.40 pip artifact file

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

.env.example

@@ -13,3 +13,6 @@ CORS_ORIGINS=http://localhost:1577
 # Server
 BACKEND_HOST=0.0.0.0
 BACKEND_PORT=8000
+
+# AI Design Analysis (optional — leave empty to disable)
+ANTHROPIC_API_KEY=

backend/=0.40

@@ -1 +0,0 @@
-(eval):1: command not found: pip

backend/Dockerfile

@@ -6,10 +6,14 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libgl1-mesa-glx libglib2.0-0 curl git && \
     rm -rf /var/lib/apt/lists/*
 
+# Copy dependency spec first for layer caching
 COPY pyproject.toml .
-RUN pip install --no-cache-dir -e . && \
+
+# Install dependencies (non-editable, just deps)
+RUN pip install --no-cache-dir . && \
     pip install --no-cache-dir "deepgaze-pytorch @ git+https://github.com/matthias-k/DeepGaze.git"
 
+# Copy application source
 COPY . .
 
 RUN mkdir -p data/uploads

backend/app/db/migrations/versions/2f6f70f606a1_initial_schema.py

@@ -45,6 +45,10 @@ def upgrade() -> None:
     sa.Column('gaze_sequence', sa.JSON(), nullable=True),
     sa.Column('hotspots', sa.JSON(), nullable=True),
     sa.Column('overall_score', sa.Float(), nullable=True),
+    sa.Column('ai_insights', sa.JSON(), nullable=True),
+    sa.Column('ai_score', sa.Integer(), nullable=True),
+    sa.Column('ai_score_reason', sa.String(length=500), nullable=True),
+    sa.Column('ai_cost_usd', sa.Float(), nullable=True),
     sa.Column('created_at', sa.DateTime(), server_default=sa.text('now()'), nullable=False),
     sa.ForeignKeyConstraint(['project_id'], ['projects.id'], ),
     sa.PrimaryKeyConstraint('id')

docker-compose.dev.yml

@@ -3,6 +3,8 @@ services:
     build:
       context: ./backend
     command: uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload
+    environment:
+      ANTHROPIC_API_KEY: ${ANTHROPIC_API_KEY:-}
     volumes:
       - ./backend:/app
       - uploads:/app/data/uploads

docker-compose.yml

@@ -24,6 +24,7 @@ services:
       UPLOAD_DIR: /app/data/uploads
       DEVICE: auto
       CORS_ORIGINS: http://localhost:1577
+      ANTHROPIC_API_KEY: ${ANTHROPIC_API_KEY:-}
     volumes:
       - uploads:/app/data/uploads
     depends_on: