feat: improve session sharing and Kimi transcript support

- normalize Kimi thinking parts and omit empty placeholders
- add standalone session-sharing and UI demo artifacts
- add regression coverage and refresh the Kimi index marker
- bump the Electron app and CLI packages to v0.2.1
- ignore generated app build assets

app/package.json

@@ -1,6 +1,6 @@
 {
   "name": "obelisk",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Memory management for Obelisk — let Claude Code search its own memory",
   "homepage": "https://github.com/tommy0103/obelisk",
   "author": {
@@ -17,6 +17,7 @@
     "dist:mac": "electron-vite build && electron-builder --mac",
     "dist:win": "electron-vite build && electron-builder --win",
     "dist:linux": "electron-vite build && electron-builder --linux",
+    "generate:session-share": "node scripts/generate-session-share.mjs",
     "verify:icons": "node scripts/verify-icons.mjs",
     "test:electron": "electron-vite build && electron --no-sandbox tests/electron-concurrency.mjs",
     "test:electron:timeline": "electron-vite build && electron --no-sandbox tests/electron-session-virtualization.mjs",