Summary

• remove the standalone Agent section from the desktop Settings drawer
• drop the settings navigation metadata and locale strings for temperature, max tool rounds, and system prompt editing in that section
• leave the backend agent config shape intact so runtime controls can be added elsewhere without a config migration

Testing

• pnpm typecheck (fails: current worktree is missing generated wailsjs modules and has an existing bridge.ts type constraint error)
• rg check confirmed no SettingsPanel/locale references remain for the removed Agent settings controls
• attempted local Playwright browser check, but playwright is not installed in this worktree