config: unify configuration with multi-site support

- Remove mock_content setting (working database loop makes it unnecessary)
- Change server.dev_mode to global dev_mode setting for consistency
- Update CLI to use cli.site_id and cli.output for scoped configuration
- Implement database client for CLI enhance command (complete static site loop)
- Update justfile to use INSERTR_DATABASE_PATH environment variable
- Enable multi-site architecture: server is site-agnostic, CLI is site-specific
- Unified insertr.yaml now supports both server and CLI with minimal config

insertr.yaml

@@ -1,25 +1,23 @@
-# Insertr Configuration File
-# This file provides default configuration for the unified insertr binary
-
-# Database configuration
-database:
-  path: "./insertr.db"  # SQLite file path or PostgreSQL connection string
-
-# API configuration (for remote content API)
-api:
-  url: ""               # Content API URL (leave empty to use local database)
-  key: ""               # API authentication key
-
-# Server configuration
-server:
-  port: 8080            # HTTP server port
-  dev_mode: false       # Enable development mode features
-
-# Build configuration
-build:
-  input: "./src"        # Default input directory for enhancement
-  output: "./dist"      # Default output directory for enhanced files
+# Insertr Unified Configuration
+# Server and CLI configuration - library manages its own config
 
 # Global settings
-site_id: "demo"         # Default site ID for content lookup
-mock_content: false     # Use mock content instead of real data
+dev_mode: false          # Development mode (affects server CORS, CLI verbosity)
+
+# Database configuration  
+database:
+  path: "./insertr.db"   # SQLite file or PostgreSQL connection string
+
+# Server configuration (multi-site ready)
+server:
+  port: 8080            # HTTP API server port
+
+# CLI enhancement configuration
+cli:
+  site_id: "demo"       # Default site ID for CLI operations
+  output: "./dist"      # Default output directory for enhanced files
+  
+# API client configuration (for CLI remote mode)
+api:
+  url: ""               # Content API URL (empty = use local database)
+  key: ""               # API authentication key