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.

package.json

@@ -32,6 +32,7 @@
     "test:assistant-footer": "esbuild scripts/assistant-message-footer-regression.tsx --bundle --platform=node --format=cjs --jsx=automatic --loader:.css=empty --outfile=.tmp/assistant-message-footer-regression.cjs --log-level=error && node .tmp/assistant-message-footer-regression.cjs",
     "test:omp-protocol": "esbuild scripts/omp-protocol-probe.ts --bundle --platform=node --format=esm --outfile=.tmp/omp-protocol-probe.mjs --log-level=warning && node .tmp/omp-protocol-probe.mjs",
     "test:conversation-ipc": "esbuild scripts/conversation-ipc-regression.ts --bundle --platform=node --format=esm --external:esbuild --outfile=.tmp/conversation-ipc-regression.mjs --log-level=warning && node .tmp/conversation-ipc-regression.mjs",
+    "test:personalization": "esbuild scripts/personalization-prompt-regression.ts --bundle --platform=node --format=esm --outfile=.tmp/personalization-prompt-regression.mjs --log-level=warning && node .tmp/personalization-prompt-regression.mjs",
     "recover:artifact-reference": "node scripts/rea/recover-artifact-reference.mjs",
     "test:artifacts": "esbuild scripts/artifact-diff-regression.ts scripts/artifact-renderer-regression.tsx scripts/specialized-block-regression.tsx --bundle --platform=node --format=cjs --jsx=automatic --loader:.css=empty --out-extension:.js=.cjs --outdir=.tmp/artifact-tests --log-level=warning && node .tmp/artifact-tests/artifact-diff-regression.cjs && node .tmp/artifact-tests/artifact-renderer-regression.cjs && node .tmp/artifact-tests/specialized-block-regression.cjs",
     "recover:conversation-labels": "node scripts/rea/recover-conversation-labels.mjs",