Phase 002: rebrand to hermes-ui and consolidate i18n to zh/en

Removes the ekko / hermes-web-ui branding from the whole tree and drops
eight locale files, so the project presents one name and one language pair.

Data compatibility is deliberate, not accidental: DB filenames, the JWT
audience, and skill manifest ownership all still recognise their pre-rename
values so existing deployments under ~/.hermes-web-ui keep working without a
re-login or a re-injection.

scripts/harness-check.mjs now scans for the legacy strings and fails the
build on any new occurrence, with an explicit allow-list (and reasons) for
the compatibility paths that must keep them.

packages/server/src/lib/llm-prompt.ts

@@ -39,14 +39,14 @@ export const AI_OUTPUT_FORMAT_GUIDELINES = `
 \`\`\`
 [屏幕录制](/tmp/screen-recording.mp4)
 [操作演示](/tmp/demo.webm)
-[录屏2026-05-08 15.19.46](/Users/ekko/Desktop/录屏2026-05-08%2015.19.46.mov)
-[录屏2026-05-08 15.19.46](</Users/ekko/Desktop/录屏2026-05-08 15.19.46.mov>)
+[录屏2026-05-08 15.19.46](/Users/demo/Desktop/录屏2026-05-08%2015.19.46.mov)
+[录屏2026-05-08 15.19.46](</Users/demo/Desktop/录屏2026-05-08 15.19.46.mov>)
 [Windows 录屏](<C:/Users/Administrator/Desktop/screen recording.mov>)
 \`\`\`
 
 错误示例：
 \`\`\`
-[录屏2026-05-08 15.19.46](/Users/ekko/Desktop/录屏2026-05-08 15.19.46.mov)
+[录屏2026-05-08 15.19.46](/Users/demo/Desktop/录屏2026-05-08 15.19.46.mov)
 ![桌面截图](C:\\Users\\Administrator\\Desktop\\screenshot.png)
 \`\`\`