feat(FN-2579): merge fusion/fn-2579 (auto-resolved)

- fix(FN-2579): complete Step 3 — refine split-button accessibility
- fix(FN-2579): resolve workspace lint regression in provider
- test(FN-2579): complete Step 2 — update header engine control tests
- feat(FN-2579): complete Step 1 — style engine split-button dropdown
- feat(FN-2579): complete Step 0 — add engine control split-button behavior
- chore(release): v1.0.0

packages/pi-claude-cli/CHANGELOG.md

@@ -1,6 +1,6 @@
 # @fusion/pi-claude-cli
 
-## 0.3.0
+## 1.0.0
 
 ## 0.2.7
 

packages/pi-claude-cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@fusion/pi-claude-cli",
-  "version": "0.3.0",
+  "version": "1.0.0",
   "description": "Fusion vendored fork: pi coding-agent extension that routes LLM calls through the Claude Code CLI. Forked from rchern/pi-claude-cli (MIT). See UPSTREAM.md.",
   "license": "MIT",
   "private": true,