v1.0.0

v1.0.0 — first packaged release

All seven plan phases shipped (Phase 4 GitHub + 4.5 LMM + 5 Auth +
6 Vault Sync + 7a Palette/Snippets/Notifications + 7b Auto-updater +
7c Split panes + 7d Tray/Hotkeys + 7e Cost tracker + 7f Conversations).

Installer artifacts at out/make/squirrel.windows/x64/:
- Claude Code Studio-1.0.0 Setup.exe (175 MB)
- claude_code_studio-1.0.0-full.nupkg (174 MB)
- RELEASES (Squirrel update manifest)

Build requires Node 22 LTS (Node 24 incompatibility documented in
HANDOFF.md). Renderer / asar / node-pty native unpacking all
verified in this build per SECURITY_REVIEW_PACKAGING.md.