feat: unified message architecture with provider adapters and session store

- Add provider adapter layer (server/providers/) with registry pattern
    - Claude, Cursor, Codex, Gemini adapters normalize native formats to NormalizedMessage
    - Shared types.js defines ProviderAdapter interface and message kinds
    - Registry enables polymorphic provider lookup

  - Add unified REST endpoint: GET /api/sessions/:id/messages?provider=...
    - Replaces four provider-specific message endpoints with one
    - Delegates to provider adapters via registry

  - Add frontend session-keyed store (useSessionStore)
    - Per-session Map with serverMessages/realtimeMessages/merged
    - Dedup by ID, stale threshold for re-fetch, background session accumulation
    - No localStorage for messages — backend JSONL is source of truth

  - Add normalizedToChatMessages converter (useChatMessages)
    - Converts NormalizedMessage[] to existing ChatMessage[] UI format

  - Wire unified store into ChatInterface, useChatSessionState, useChatRealtimeHandlers
    - Session switch uses store cache for instant render
    - Background WebSocket messages routed to correct session slot

CHANGELOG.md

@@ -3,29 +3,6 @@
 All notable changes to CloudCLI UI will be documented in this file.
 
 
-## [1.26.0](https://github.com/siteboon/claudecodeui/compare/v1.25.2...v1.26.0) (2026-03-20)
-
-### New Features
-
-* add German (Deutsch) language support ([#525](https://github.com/siteboon/claudecodeui/issues/525)) ([a7299c6](https://github.com/siteboon/claudecodeui/commit/a7299c68237908c752d504c2e8eea91570a30203))
-* add WebSocket proxy for plugin backends ([#553](https://github.com/siteboon/claudecodeui/issues/553)) ([88c60b7](https://github.com/siteboon/claudecodeui/commit/88c60b70b031798d51ce26c8f080a0f64d824b05))
-* Browser autofill support for login form ([#521](https://github.com/siteboon/claudecodeui/issues/521)) ([72ff134](https://github.com/siteboon/claudecodeui/commit/72ff134b315b7a1d602f3cc7dd60d47c1c1c34af))
-* git panel redesign ([#535](https://github.com/siteboon/claudecodeui/issues/535)) ([adb3a06](https://github.com/siteboon/claudecodeui/commit/adb3a06d7e66a6d2dbcdfb501615e617178314af))
-* introduce notification system and claude notifications ([#450](https://github.com/siteboon/claudecodeui/issues/450)) ([45e71a0](https://github.com/siteboon/claudecodeui/commit/45e71a0e73b368309544165e4dcf8b7fd014e8dd))
-* **refactor:** move plugins to typescript ([#557](https://github.com/siteboon/claudecodeui/issues/557)) ([612390d](https://github.com/siteboon/claudecodeui/commit/612390db536417e2f68c501329bfccf5c6795e45))
-* unified message architecture with provider adapters and session store ([#558](https://github.com/siteboon/claudecodeui/issues/558)) ([a4632dc](https://github.com/siteboon/claudecodeui/commit/a4632dc4cec228a8febb7c5bae4807c358963678))
-
-### Bug Fixes
-
-* detect Claude auth from settings env ([#527](https://github.com/siteboon/claudecodeui/issues/527)) ([95bcee0](https://github.com/siteboon/claudecodeui/commit/95bcee0ec459f186d52aeffe100ac1a024e92909))
-* remove /exit command from claude login flow during onboarding ([#552](https://github.com/siteboon/claudecodeui/issues/552)) ([4de8b78](https://github.com/siteboon/claudecodeui/commit/4de8b78c6db5d8c2c402afce0f0b4cc16d5b6496))
-
-### Documentation
-
-* add German language link to all README files ([#534](https://github.com/siteboon/claudecodeui/issues/534)) ([1d31c3e](https://github.com/siteboon/claudecodeui/commit/1d31c3ec8309b433a041f3099955addc8c136c35))
-* **readme:** hotfix and improve for README.jp.md ([#550](https://github.com/siteboon/claudecodeui/issues/550)) ([7413c2c](https://github.com/siteboon/claudecodeui/commit/7413c2c78422c308ac949e6a83c3e9216b24b649))
-* **README:** update translations with CloudCLI branding and feature restructuring ([#544](https://github.com/siteboon/claudecodeui/issues/544)) ([14aef73](https://github.com/siteboon/claudecodeui/commit/14aef73cc6085fbb519fe64aea7cac80b7d51285))
-
 ## [1.25.2](https://github.com/siteboon/claudecodeui/compare/v1.25.0...v1.25.2) (2026-03-11)
 
 ### New Features

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@siteboon/claude-code-ui",
-  "version": "1.26.0",
+  "version": "1.25.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@siteboon/claude-code-ui",
-      "version": "1.26.0",
+      "version": "1.25.2",
       "hasInstallScript": true,
       "license": "GPL-3.0",
       "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@siteboon/claude-code-ui",
-  "version": "1.26.0",
+  "version": "1.25.2",
   "description": "A web-based UI for Claude Code CLI",
   "type": "module",
   "main": "server/index.js",