feat: add History page for browsing Hermes sessions (v0.5.5) (#370)

Features:
- Add dedicated History page for browsing Hermes session history
- Independent session state (does not interfere with active chat)
- Auto-select first CLI session on page load
- Filter out api_server and cron sources

Components:
- New HistoryView.vue with isolated state management
- New HistoryMessageList.vue with session prop support
- Filters empty content and tool messages without toolName

Backend:
- Add GET /api/hermes/sessions/hermes endpoint (excludes api_server)
- Add GET /api/hermes/sessions/hermes/:id endpoint (404s for api_server)
- Add fetchHermesSessions() and fetchHermesSession() API functions

Cleanup:
- Remove localStorage session caching
- Simplify profile switching cache management
- Clean up废弃 cache cleanup calls

i18n:
- Add "History" translation to all 8 locales
- Add v0.5.5 changelog entries in all languages
- 🎉 Happy Labor Day!

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "hermes-web-ui",
-  "version": "0.5.4",
+  "version": "0.5.5",
   "description": "Self-hosted AI chat dashboard for Hermes Agent — multi-model (Claude, GPT, Gemini, DeepSeek) web UI with Telegram, Discord, Slack, WhatsApp integration",
   "repository": {
     "type": "git",