Release v1.3.0: AI feature flag and MCP server

- Add AI_FEATURES_ENABLED config flag to gate AI/natural-language features
- Conditionally register /api/ask router based on AI_FEATURES_ENABLED
- Add GET /api/config/features endpoint for frontend feature detection
- Update frontend to hide Ask panel when AI features are disabled
- Implement standalone MCP server (backend/mcp_server.py) with tools:
  * search_events, get_event, get_summary, ask
- Add mcp dependency to requirements.txt
- Update .env.example, AGENTS.md, and ROADMAP.md
- Bump VERSION to 1.3.0

backend/tests/test_api.py

@@ -1,6 +1,41 @@
 from datetime import UTC, datetime
 
 
+def test_config_features(client):
+    response = client.get("/api/config/features")
+    assert response.status_code == 200
+    data = response.json()
+    assert "ai_features_enabled" in data
+    assert isinstance(data["ai_features_enabled"], bool)
+
+
+def test_ask_disabled_when_ai_features_off():
+    import subprocess
+    import sys
+
+    code = """
+import sys
+sys.path.insert(0, '.')
+import os
+os.environ['AI_FEATURES_ENABLED'] = 'false'
+
+# Re-import config with the env override
+import importlib
+import config
+importlib.reload(config)
+
+# Now import main; it will pick up the new AI_FEATURES_ENABLED
+import main
+ask_paths = [r.path for r in main.app.routes if hasattr(r, 'path') and 'ask' in r.path]
+print('ASK_PATHS:', ask_paths)
+assert len(ask_paths) == 0, f"Expected no ask routes, found: {ask_paths}"
+print('OK')
+"""
+    result = subprocess.run([sys.executable, "-c", code], capture_output=True, text=True, cwd=".")
+    assert result.returncode == 0, f"Subprocess failed: {result.stdout}\n{result.stderr}"
+    assert "OK" in result.stdout
+
+
 def test_health(client):
     response = client.get("/health")
     assert response.status_code == 200