chore: release v0.11.5

feat: SkillHub skill store (SDK-based, no CLI dependency)
- Rust SDK (skillhub.rs): HTTP search, index fetch, zip download+extract
- Node.js SDK (skillhub-sdk.js): mirrors Rust SDK for Web/Docker mode
- Skills page: new "Store" tab with full index browse + client-side filter
- Remove 6 old CLI-dependent commands, add 3 SDK commands
- Migrate assistant.js skill tools from ClawHub CLI to SkillHub SDK
- Fix index decode error ({total,skills} wrapper vs bare array)
- Fix skill name display (API field 'name' vs 'display_name')
- Clean up 13 dead CSS rules from old skills hero/tips UI

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/tauri-apps/tauri/dev/crates/tauri-config-schema/schema.json",
   "productName": "ClawPanel",
-  "version": "0.11.4",
+  "version": "0.11.5",
   "identifier": "ai.openclaw.clawpanel",
   "build": {
     "frontendDist": "../dist",