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/components/InferenceSettings.tsx

@@ -2,6 +2,7 @@ import { useEffect, useState } from 'react';
 import { toast } from 'sonner';
 import { Button } from '@/components/ui/button';
 import { Database, Zap, Clock, BarChart3, Folder } from 'lucide-react';
+import { api } from '@/api/client';
 
 interface InferenceConfig {
   cache_type_k: string;
@@ -58,9 +59,8 @@ export function InferenceSettings() {
   const [saving, setSaving] = useState(false);
 
   useEffect(() => {
-    fetch('/api/settings/inference')
-      .then((r) => (r.ok ? r.json() : Promise.reject()))
-      .then((data) => setConfig(data as InferenceConfig))
+    api.settings.inference.get()
+      .then((data) => setConfig(data as unknown as InferenceConfig))
       .catch(() => {
         setConfig({ ...DEFAULTS });
         toast.error('Could not load inference config — loading defaults');
@@ -76,14 +76,8 @@ export function InferenceSettings() {
     if (!config || saving) return;
     setSaving(true);
     try {
-      const res = await fetch('/api/settings/inference', {
-        method: 'PATCH',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify(config),
-      });
-      if (!res.ok) throw new Error('Save failed');
-      const updated = (await res.json()) as InferenceConfig;
-      setConfig(updated);
+      const updated = await api.settings.inference.patch(config as unknown as Record<string, unknown>);
+      setConfig(updated as unknown as InferenceConfig);
       toast.success('Inference settings saved');
     } catch (err) {
       toast.error(err instanceof Error ? err.message : 'Save failed');