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/server/src/index.ts

@@ -21,6 +21,7 @@ import { registerSkillsRoutes } from './routes/skills.js';
 import { registerTraceRoutes } from './routes/traces.js';
 import { registerToolsRoutes } from './routes/tools.js';
 import { registerAnalyticsRoutes } from './routes/analytics.js';
+import { registerMemoryRoutes } from './routes/memory.js';
 
 import { registerInferenceSettingsRoutes } from './routes/inference-settings.js';
 import { createInferenceRunner, runInferenceWithModel } from './services/inference/index.js';
@@ -155,6 +156,7 @@ async function main() {
     hasActiveInference: (chatId) => inference.hasActive(chatId),
   });
   registerTraceRoutes(app, sql);
+  registerMemoryRoutes(app, sql);
   registerToolsRoutes(app, sql);
   registerAnalyticsRoutes(app, sql);
   registerInferenceSettingsRoutes(app);