Expand the shell pane into a shared TUI and GUI workspace

[bborn]

Summary

Task detail now keeps the conversation and agent on the left with a flexible workspace on the right. Shell remains the default; the launcher opens cached PR details, workspace files, and rendered Markdown. The TUI exposes the same providers with w and keyboard tab navigation.

• Shared Go provider registry, canonical resource identity, persistent task tabs, CLI commands, HTTP routes, and renderer parity coverage.
• GUI split resizing and phone workspace toggle; independent terminal mirrors preserve task-owned sessions and dimensions.
• TUI uses Bubbles help/key.Binding for contextual shortcuts and list for launcher/file navigation, fuzzy filtering, and pagination. Alt+H expands help; no new dependencies.
• TUI workspace helper preserves the agent and shell jobs. The GUI reuses a shell parked by the TUI instead of starting a duplicate.
• Bounded file previews confined to the task workspace; remote previews use the recorded placement and a bounded Python protocol.

Validation

• Full Go suite: go test -p 2 ./... passed.
• Go 1.26-compatible golangci-lint v2.13.2: 0 issues.
• GUI build and embedded GUI binary build passed.
• Existing pane QA: 34 view checks, 23 key checks, 32 edge checks passed.
• Bubbles refactor: UI/parity/CLI tests and lint passed; new regressions cover paging, filtering, help sizing, and shell key isolation.
• New ty-qa-workspace.sh passed (rerun after the Bubbles refactor, including expanded help and file filtering): launcher, PR, Markdown, duplicate opens, live shell job survival, and helper cleanup.
• Chromium desktop and phone layout checked using isolated harness fixtures. Verified shared parked-shell input and close/reopen survival, keyboard resizing, and no browser errors.

Full QA report · Usage and provider contract

Scope and limits

This first provider set is compiled into TaskYou; runtime third-party plugins and browser embedding remain follow-ups. PR details use the existing cache. Terminal mirrors use the task's existing dimensions; native TUI shell access remains available with \. The native Tauri wrapper and a live remote SSH host were not exercised; the GUI browser surface and remote file protocol were tested.

Screenshots

Generated from synthetic QA harness fixtures and published with ty-qa-publish.sh.