fix: resolve Docker AI features connection to Ollama

Critical fix for AI features (reformulation, auto-labels) in Docker.
Only title generation was working because it had hardcoded fallback.

Problem:
- Code uses OLLAMA_BASE_URL environment variable
- docker-compose.yml was setting OLLAMA_API_URL (wrong variable)
- .env.docker was missing on server
- Container couldn't connect to Ollama service

Root cause:
- Environment variable name mismatch
- Missing OLLAMA_BASE_URL configuration
- localhost:11434 doesn't work in Docker (need service name)

Solution:
1. Update docker-compose.yml:
   - Change OLLAMA_API_URL → OLLAMA_BASE_URL
   - Add OLLAMA_MODEL environment variable
   - Default to http://ollama:11434 (Docker service name)

2. Update .env.docker:
   - Add OLLAMA_BASE_URL="http://ollama:11434"
   - Add OLLAMA_MODEL="granite4:latest"
   - Document AI provider configuration

3. Update .env.docker.example:
   - Add examples for different Ollama setups
   - Document Docker service name vs external IP
   - Add OpenAI configuration example

Result:
✓ All AI features now work in Docker (titles, reformulation, auto-labels)
✓ Proper connection to Ollama container via Docker network
✓ Clear documentation for different deployment scenarios

Technical details:
- Docker service name "ollama" resolves to container IP
- Port 11434 accessible within memento-network
- Fallback to localhost only for local development

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.env.docker

@@ -8,7 +8,8 @@ NEXTAUTH_URL="http://192.168.1.190:3000"
 # AI Provider Configuration
 # ============================================
 AI_PROVIDER=ollama
-OLLAMA_API_URL="http://ollama:11434"
+OLLAMA_BASE_URL="http://ollama:11434"
+OLLAMA_MODEL="granite4:latest"
 
 # ============================================
 # Email Configuration (Optional)

.env.docker.example

@@ -14,8 +14,19 @@ NEXTAUTH_URL="http://YOUR_SERVER_IP:3000"
 # ============================================
 # AI Provider Configuration
 # ============================================
+# For local Ollama in Docker (service name):
 AI_PROVIDER=ollama
-OLLAMA_API_URL="http://ollama:11434"
+OLLAMA_BASE_URL="http://ollama:11434"
+OLLAMA_MODEL="granite4:latest"
+
+# For external Ollama (on host or different server):
+# AI_PROVIDER=ollama
+# OLLAMA_BASE_URL="http://YOUR_SERVER_IP:11434"
+# OLLAMA_MODEL="granite4:latest"
+
+# For OpenAI:
+# AI_PROVIDER=openai
+# OPENAI_API_KEY="sk-..."
 
 # ============================================
 # Email Configuration (Optional)

docker-compose.yml

@@ -26,7 +26,8 @@ services:
 
       # AI Providers
       - OPENAI_API_KEY=${OPENAI_API_KEY}
-      - OLLAMA_API_URL=${OLLAMA_API_URL:-http://ollama:11434}
+      - OLLAMA_BASE_URL=${OLLAMA_BASE_URL:-http://ollama:11434}
+      - OLLAMA_MODEL=${OLLAMA_MODEL:-granite4:latest}
     volumes:
       - db-data:/app/prisma
       - uploads-data:/app/public/uploads