Add AI prompt tool for natural language graph operations

New MCP tool and portal UI for executing natural language instructions
against the memory graph via Ollama (qwen3-coder:30b). Single LLM call
generates a JSON action plan which is executed sequentially.

Supports 8 action types: add_node, update_node, remove_node, add_edge,
remove_edge, bulk_tag, reorganize, query. Actions can reference previous
results via $result[N].field interpolation. Uses /api/chat with few-shot
assistant example, format:json, and temperature:0 for reliable output.

portal/src/App.tsx

@@ -8,6 +8,7 @@ import QueryBar from './components/QueryBar';
 import LinkModal from './components/LinkModal';
 import Toast from './components/Toast';
 import MaintenancePanel from './components/MaintenancePanel';
+import PromptPanel from './components/PromptPanel';
 
 export default function App() {
   const [selectedId, setSelectedId] = useState<string | null>(null);
@@ -17,6 +18,7 @@ export default function App() {
   const [drawerOpen, setDrawerOpen] = useState(false);
   const [showQuery, setShowQuery] = useState(false);
   const [showMaintenance, setShowMaintenance] = useState(false);
+  const [showPrompt, setShowPrompt] = useState(false);
   const qc = useQueryClient();
 
   const refresh = useCallback(() => {
@@ -38,13 +40,14 @@ export default function App() {
     const handler = (e: KeyboardEvent) => {
       if (e.key === 'Escape') {
         if (selectedId) setSelectedId(null);
+        else if (showPrompt) setShowPrompt(false);
         else if (showQuery) setShowQuery(false);
         else if (drawerOpen) setDrawerOpen(false);
       }
     };
     window.addEventListener('keydown', handler);
     return () => window.removeEventListener('keydown', handler);
-  }, [selectedId, drawerOpen, showQuery]);
+  }, [selectedId, drawerOpen, showQuery, showPrompt]);
 
   return (
     <div className="h-screen w-screen overflow-hidden relative">
@@ -76,6 +79,13 @@ export default function App() {
         >
           ?
         </button>
+        <button
+          onClick={() => setShowPrompt(!showPrompt)}
+          className="w-12 h-12 rounded-full bg-amber-600/90 backdrop-blur border border-amber-500 text-white hover:bg-amber-500 shadow-lg flex items-center justify-center text-lg"
+          title="AI Prompt"
+        >
+          &#x2726;
+        </button>
         <button
           onClick={() => setShowMaintenance(!showMaintenance)}
           className="w-12 h-12 rounded-full bg-emerald-600/90 backdrop-blur border border-emerald-500 text-white hover:bg-emerald-500 shadow-lg flex items-center justify-center text-lg"
@@ -141,6 +151,22 @@ export default function App() {
         </div>
       )}
 
+      {/* Prompt panel — slides up from bottom */}
+      {showPrompt && (
+        <div className="fixed inset-0 z-40" onClick={() => setShowPrompt(false)}>
+          <div className="absolute inset-0 bg-black/40" />
+          <div
+            className="absolute bottom-0 left-0 right-0 h-[70vh] animate-slide-in-up"
+            onClick={(e) => e.stopPropagation()}
+          >
+            <PromptPanel
+              onClose={() => setShowPrompt(false)}
+              onDone={() => { refresh(); notify('Prompt executed'); }}
+            />
+          </div>
+        </div>
+      )}
+
       {showAddNode && (
         <AddNodeModal
           onClose={() => setShowAddNode(false)}