feat: add per-workspace launch script with dedicated terminal tab

[Dimillian]

Motivation

• Provide a per-workspace “run” capability that lets users launch a workspace-specific script from the header without touching the user workspace files.

Description

• Persist a launchScript field on each workspace and mirror it in the Tauri backend types and storage so scripts are saved with workspace metadata (src/types.ts, src-tauri/src/types.rs, src-tauri/src/workspaces.rs).
• Add a small header UI with a play and edit button and inline editor popover (LaunchScriptButton) wired into the main header so the control sits next to the existing Open/In button (src/features/app/components/LaunchScriptButton.tsx, src/features/app/components/MainHeader.tsx, src/styles/main.css).
• Implement useWorkspaceLaunchScript hook to manage the editor, saving to workspace settings, and orchestrating runs via the app terminal API; it schedules runs and writes the script to a dedicated terminal tab when the session is ready (src/features/app/hooks/useWorkspaceLaunchScript.ts).
• Run scripts in a dedicated, named terminal tab for the workspace and always restart/kill the prior launch session before starting a new run by extending terminal tab helpers and controller (useTerminalTabs, useTerminalController) and by adding a title-aware ensureTerminalWithTitle + restartTerminalSession flow (src/features/terminal/hooks/*).
• Small modifications to layout/visibility wiring to allow opening the terminal programmatically and to reset terminal session state on cleanup (src/features/layout/hooks/*, src/App.tsx, src/features/terminal/hooks/useTerminalSession.ts).
• Add unit tests covering the new terminal-tab helper and the launch-script hook behavior, and include minimal styles and editor UX for the popover (src/features/terminal/hooks/useTerminalTabs.test.tsx, src/features/app/hooks/useWorkspaceLaunchScript.test.tsx).

Testing

• Ran npm run lint with no linter errors.
• Ran npm run test and all automated tests passed, including the new tests (useWorkspaceLaunchScript and useTerminalTabs) — full test suite reported success (all tests passed).
• Ran npm run typecheck and TypeScript checks completed successfully.

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Codex Task

[Dimillian]

@codex review

[chatgpt-codex-connector]

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