feat(settings): replicate the WorkBuddy personalization panel and wire identity, tone and prompts (TODO 13)

Recover the WorkBuddy 5.8.3 个性化 page from REA evidence (PersonalizationPanel-D16rRGjy.css + tokens): 45 module rules plus scoped light/dark tokens, the five-card 1160px layout (identity card 638x100 with inline editors, reply preference card 638x204, three 638x264 long-text cards with 598x160 previews) and the 640x520 editor modal.

Persist identity, tone, welcome tips, custom instructions, persona and long-term memory in config.json, expose personalization:get/update over IPC, and append the resulting personalization context to each turn's prompt for both the OMP and built-in kernels. Wire 欢迎语 to the streaming loading tips and keep 显示文件修改过程 visibly disabled because YCode has no incremental file-change renderer yet.

Verify with scripts/verify-personalization-settings.cjs: 29 assertions covering geometry, tone options, switches, inline identity editing with blur-discard, editor modal save/cancel, config persistence, reopen, dark surfaces and no renderer errors. Add a pure prompt-builder regression and keep every existing settings regression green.

src/shared/ipc.ts

@@ -13,7 +13,9 @@ import type {
   AppInfo,
   GitBranchInfo,
   GeneralSettingsPatch,
-  GeneralSettingsView
+  GeneralSettingsView,
+  PersonalizationPatch,
+  PersonalizationSettings
 } from './types'
 import type { DownloadPayload, DownloadResult, ResourceEntry, ResourceRange, WorkspaceResource } from './resources'
 import type { ChatAttachment, InteractionResponse, MessageQuote, PermissionMode } from './conversation'
@@ -113,6 +115,11 @@ export interface YCodeApi {
     /** 打开系统通知设置页。 */
     openSystemNotificationSettings(): Ipc<void>
   }
+  /** 设置 → 个性化：身份、回复风格、指令、人设与长期记忆。 */
+  personalization: {
+    get(): Ipc<PersonalizationSettings>
+    update(patch: PersonalizationPatch): Ipc<PersonalizationSettings>
+  }
   workspace: {
     get(): Ipc<WorkspaceInfo>
     choose(): Ipc<WorkspaceInfo & { changed: boolean }>