feat: component wiring integration — orphan cleanup, Memory page, WS handlers

Memory page: Added REST endpoints (routes/memory.ts, 3 GETs: list/daily/dreams),
React route in App.tsx, nav link in ProjectSidebar (Brain icon).

Orphan components wired: KeyboardShortcutsDialog (? key in AppShell),
McpResponseDisplay (MCP tool results in ToolCallLine), CacheShapeBadge
(StatsLine in MessageBubble). MessageBoundary + MessageListErrorBoundary
confirmed already wired in MarkdownRenderer/MessageList.

Dead code cleanup: useDraftPersistence integrated into ChatInput
(localStorage draft save/restore/clear on send). message-parts barrel
made canonical — MessageBubble imports from it; StatsLine updated with
CacheShapeBadge parity. api.settings.inference typed wrapper added;
InferenceSettings raw fetch replaced.

WS frame handlers: reasoning_delta (accumulates like delta), tool_trace_start,
tool_trace_finish, collision_warning, agent_message acknowledged in
useSessionStream. CollisionWarningEvent + AgentMessageEvent added to
sessionEvents union. Forwarding in useCoderUserEvents. reasoning_delta
+ collision_warning added to web WsFrame type. useSidebar default case
fixes pre-existing fallthrough error.

Workflow engine: services/workflow/index.ts documented as experimental;
coder flow-runner (apps/coder/src/services/flow-runner.ts) is canonical.

Verification: web type-check clean, server build clean, 627 tests pass.

apps/web/src/App.tsx

@@ -9,6 +9,7 @@ import { Session } from '@/pages/Session';
 import { Settings } from '@/pages/Settings';
 import { Analytics } from '@/pages/Analytics';
 import { Results } from '@/pages/Results';
+import { Memory } from '@/pages/Memory';
 import { Toaster } from '@/components/ui/sonner';
 import { useUserEvents } from '@/hooks/useUserEvents';
 import { useCoderUserEvents } from '@/hooks/useCoderUserEvents';
@@ -19,6 +20,7 @@ import { useViewport } from '@/hooks/useViewport';
 import { ThemeFx } from '@/components/fx/ThemeFx';
 import { FlowLauncherDialog } from '@/components/FlowLauncherDialog';
 import { ArenaLauncherDialog } from '@/components/ArenaLauncherDialog';
+import { KeyboardShortcutsDialog } from '@/components/KeyboardShortcutsDialog';
 
 function SessionRightRail() {
   const { id } = useParams<{ id: string }>();
@@ -75,6 +77,19 @@ function AppShell() {
   useTheme();
   useUserEvents();
   useCoderUserEvents();
+  const [showShortcuts, setShowShortcuts] = useState(false);
+  useEffect(() => {
+    const handler = (e: KeyboardEvent) => {
+      if (e.key === '?' && !e.metaKey && !e.ctrlKey && !e.altKey) {
+        const tag = (e.target as HTMLElement)?.tagName;
+        if (tag !== 'INPUT' && tag !== 'TEXTAREA' && !(e.target as HTMLElement)?.isContentEditable) {
+          setShowShortcuts((v) => !v);
+        }
+      }
+    };
+    window.addEventListener('keydown', handler);
+    return () => window.removeEventListener('keydown', handler);
+  }, []);
   // v1.10.8c: h-dvh (dynamic viewport) instead of h-screen (100vh) so the
   // root height excludes the iOS URL-bar overlay area. Without this, every
   // descendant — including the terminal pane — measures itself against a
@@ -99,6 +114,7 @@ function AppShell() {
             <Route path="/settings" element={<Settings />} />
             <Route path="/analytics" element={<Analytics />} />
             <Route path="/results" element={<Results />} />
+            <Route path="/memory" element={<Memory />} />
           </Routes>
         </main>
         <MobileRightRailBackdrop />
@@ -108,6 +124,7 @@ function AppShell() {
         <Toaster position="bottom-right" />
         <FlowLauncherDialog />
         <ArenaLauncherDialog />
+        <KeyboardShortcutsDialog open={showShortcuts} onOpenChange={setShowShortcuts} />
       </div>
     </>
   );