The previous tab strip height made session titles and toolbar affordances feel cramped. Increase the shared titlebar height token for tabs, overflow controls, and the native drag gutter so the top chrome reads as a deliberate desktop titlebar while preserving the existing drag, close, and toolbar interactions.
Constraint: Keep the change scoped to the desktop tab strip and avoid changing session state, ordering, or window-control behavior
Rejected: Increase only the outer bar height | tab hit targets and overflow controls would remain visually misaligned
Confidence: high
Scope-risk: narrow
Directive: Keep tab, overflow button, and drag-gutter heights aligned when changing this titlebar again
Tested: cd desktop && bunx vitest run src/components/layout/TabBar.test.tsx
Tested: bun run check:desktop
Tested: Browser smoke on Vite with tab bar measured at about 44px and toolbar controls centered
Not-tested: Native packaged Tauri window rendering on Windows titlebar controls
Desktop sessions need a fast local escape hatch that opens the same materialized cwd the agent is editing, without showing unavailable IDE choices or persisting detection state. This adds a local open-targets API with silent in-memory detection for common IDEs and platform file managers, then wires a compact Codex-style toolbar menu into the desktop TabBar for active session workdirs.
Constraint: The first version is local IDE/editor and Finder/Explorer/file-manager only, no terminal targets or IDE plugin integration.
Constraint: The opened path must come from the active session workDir so isolated worktrees open the actual agent editing surface.
Rejected: Persisting detected applications | detection is cheap and temporary state avoids stale app inventory.
Rejected: Rendering unavailable IDEs as disabled menu rows | the user asked to show only detected targets and fall back to Finder/Explorer when no IDE is available.
Confidence: high
Scope-risk: moderate
Directive: Keep this path session-workdir based; do not switch it to repository root without proving isolated worktree behavior.
Tested: bun test src/server/__tests__/open-target-service.test.ts src/server/__tests__/open-target-api.test.ts
Tested: cd desktop && bun run test -- src/stores/openTargetStore.test.ts src/components/layout/OpenProjectMenu.test.tsx src/components/layout/TabBar.test.tsx
Tested: cd desktop && bun run lint
Tested: bun run check:desktop
Tested: bun test src/server/__tests__/h5-access-auth.test.ts -t 'allows local desktop H5 access settings under explicit server auth with a valid bearer'
Not-tested: bun run check:server full suite had one unrelated H5 auth integration timeout in the full concurrent run; the timed-out test passed when rerun alone.
When the tab strip overflows, newly opened sessions were active but could remain outside the visible horizontal viewport. The tab bar already owns element refs for drag and close behavior, so the focused fix scrolls the active tab into view after activation and refreshes overflow controls on the next frame.
Constraint: Preserve existing tab ordering, drag behavior, and close-button affordances.
Rejected: Reorder new sessions to the left | changes established tab order and makes history harder to scan.
Confidence: high
Scope-risk: narrow
Directive: Keep active-tab visibility behavior in TabBar so all activation paths share it.
Tested: cd desktop && bun run test -- TabBar
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run build
Tested: agent-browser overflow smoke with six tabs confirmed active Untitled Session fullyVisible=true
Not-tested: Full bun run verify gate.
Desktop terminal access should behave like an IDE: active project sessions open a bottom panel in the session working directory while keeping a full terminal tab available for dedicated use. The panel has constrained resizing and cleanup so session tab state remains isolated, and terminal guidance points users to the bundled claude-haha command for extension setup.
Constraint: Desktop bundles the user-facing CLI as claude-haha while claude-sidecar remains internal
Rejected: Always opening a standalone terminal tab | loses the current project context and diverges from common IDE behavior
Rejected: Exposing claude-sidecar in terminal guidance | it is an internal launcher, not the supportable user command
Confidence: high
Scope-risk: moderate
Directive: Keep bottom terminals keyed by session id and pass session workDir/projectPath into spawned terminals
Tested: bun run check:desktop
Tested: git diff --check
Tested: Computer Use E2E against built macOS app during implementation
Not-tested: bun run quality:pr is blocked by existing branch policy requiring allow-cli-core-change approval
Large desktop histories were making session discovery parse every JSONL
before pagination, while automatic title updates could still overwrite
manual names during resumed sessions. This keeps listing bounded to the
requested page, preserves custom titles, and blocks deleted placeholder
sessions from being recreated by prewarm startup.
Constraint: Desktop session storage remains JSONL-compatible with the CLI
Rejected: Virtualize the sidebar in this patch | does not fix backend JSONL parsing cost
Rejected: Disable title generation globally | would regress useful titles for unnamed sessions
Confidence: high
Scope-risk: moderate
Directive: Do not reintroduce all-file JSONL parsing on /api/sessions list paths without a heavy-session benchmark
Tested: ANTHROPIC_API_KEY=test-key bun test src/server/__tests__/title-service.test.ts src/server/__tests__/sessions.test.ts
Tested: ANTHROPIC_API_KEY=test-key bun test src/server/__tests__/conversations.test.ts
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run build
Tested: heavy local preview with 240 sessions, 320 messages each, and 40 restored tabs
Not-tested: native packaged desktop runtime under Windows with the same heavy fixture
Related: https://github.com/NanmiCoder/cc-haha/issues/237
Related: https://github.com/NanmiCoder/cc-haha/issues/248
The desktop start screen can already collect a project directory before the first chat turn, but workspace management is intentionally session-scoped. Creating a draft session immediately after project selection keeps the file manager, changed-file view, runtime selection, and terminal toolbar on the same path users see after sending the first message.
Constraint: Workspace file management state is keyed by session id.
Rejected: Add a separate non-session workspace mode | it would duplicate panel state and create a second lifecycle to maintain.
Confidence: high
Scope-risk: narrow
Directive: Keep workspace management session-scoped; create or reuse a session before exposing the workspace panel.
Tested: cd desktop && bun run test -- TabBar.test.tsx EmptySession.test.tsx
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run build
Not-tested: Native Tauri folder dialog manual smoke test.
Workspace file preview is a local desktop surface, so image files should not be blocked by the text preview byte cap. Large text files now return a bounded preview instead of an unusable too-large state, while binary files remain explicitly unsupported.
Constraint: Avoid unbounded text payloads that can freeze the desktop renderer
Rejected: Remove all read limits | large generated files can still overload JSON transport and syntax rendering
Confidence: high
Scope-risk: moderate
Directive: Keep image preview detection before text-size limiting so local images remain renderable
Tested: bun test src/server/__tests__/workspace-service.test.ts
Tested: bun test src/server/__tests__/sessions.test.ts
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run test -- src/components/workspace/WorkspacePanel.test.tsx
Tested: cd desktop && bun run build
Not-tested: Full packaged macOS smoke after this commit
Expose a workspace inspector for desktop sessions so users can browse the active project, preview files, inspect session-derived changes, and review diffs even when the work directory is not a git repository.
Constraint: The workspace view must work for temporary and non-git project directories.
Rejected: Rely only on git status | non-git sessions would lose the changed-files surface.
Confidence: medium
Scope-risk: moderate
Directive: Keep undo semantics separate from workspace browsing; checkpoint-backed rewind should remain the source of truth for rollback.
Tested: bun test src/server/__tests__/sessions.test.ts src/server/__tests__/workspace-service.test.ts
Tested: cd desktop && bun run test -- src/components/workspace/WorkspacePanel.test.tsx src/stores/workspacePanelStore.test.ts
Tested: cd desktop && bun run lint
Tested: git diff --check
Not-tested: Full desktop packaged app build after this commit
The desktop terminal already supported independent PTY sessions, but it only lived inside settings. This change promotes it to a first-class tab workflow so users can open multiple host terminals without leaving the chat-oriented desktop layout.
Constraint: Tauri terminal sessions are process-backed and must stay mounted while switching tabs.
Rejected: Reuse the settings terminal as a navigated page only | it cannot support multiple independent terminal tabs.
Rejected: Hide inactive xterm panes with display none | xterm lost visible output after tab switches during E2E.
Confidence: high
Scope-risk: moderate
Directive: Keep inactive terminal panes mounted and avoid display none unless xterm repaint behavior is reverified.
Tested: bun run test src/components/layout/ContentRouter.test.tsx src/components/layout/Sidebar.test.tsx src/components/layout/TabBar.test.tsx src/pages/TerminalSettings.test.tsx
Tested: bun run lint
Tested: bun run build
Tested: ./scripts/build-macos-arm64.sh
Tested: Computer Use E2E against build-artifacts/macos-arm64 app for multiple terminals, command output retention, tab switching, and terminal cleanup
Not-tested: Intel macOS package
The pointer-drag rewrite left the tab close control without its hover trigger,
so tabs could still be closed logically but no longer exposed the affordance.
This restores the hover group, trims the close icon to a lighter visual weight,
and adds a regression test to keep close-click behavior from colliding with drag.
Constraint: Tab close must remain compatible with the custom pointer-drag reorder flow
Rejected: Reintroduce a larger hoverable close button | made the tab chrome look visually heavy
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep the close control visually subordinate to the tab label and verify drag-click interactions before changing tab hit areas
Tested: cd desktop && bun run test -- TabBar; cd desktop && bun run lint
Not-tested: Full desktop app manual visual QA in Tauri runtime
The tab strip was relying on browser drag-and-drop, which worked in the web UI
but did not reliably start inside the macOS overlay title bar in the packaged
Tauri desktop app. This switches tab reordering to a pointer-driven interaction
that computes insertion positions directly, keeps the drag indicator behavior,
and preserves the separate window-drag fallback for non-tab title-bar space.
Constraint: Must work inside the macOS overlay title bar where native window hit-testing interferes with browser drag events
Rejected: Keep tuning draggable/drop handling | web behavior stayed fine while desktop never consistently entered the drag sequence
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep tab reordering on explicit pointer handling unless the title-bar architecture changes away from overlay hit-testing
Tested: bun run test -- src/components/layout/TabBar.test.tsx; bun run lint; bun run build
Not-tested: Manual packaged desktop app verification after this commit
The recent macOS title-bar drag fix marked the entire session tab strip as a
native drag region. That restored window movement in the overlay title area,
but it also intercepted the tab component's own HTML drag events and regressed
manual tab reordering. This narrows the native drag surface to a small gutter
beside the tabs while keeping the explicit empty-space startDragging fallback,
and adds a focused regression test for drag-to-reorder.
Constraint: Must preserve window dragging from non-tab title-bar space on macOS overlay windows
Rejected: Keep the whole tab bar as a drag region | conflicts with tab-level drag-and-drop reordering
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Do not reapply data-tauri-drag-region to the full tab strip unless tab reordering is redesigned around a different drag mechanism
Tested: bun run test -- src/components/layout/TabBar.test.tsx; bun run lint; bun run build
Not-tested: Manual desktop runtime verification after this commit
The macOS desktop build could lose its draggable gutter on the right side of
the tab bar once multiple session tabs consumed the native overlay title area.
This adds a Tauri window-drag fallback for clicks on the tab strip's empty
space while preserving tab and control interactions, and locks that behavior
with focused regression tests.
Constraint: Must preserve tab clicks, close buttons, and overflow controls while restoring drag behavior
Rejected: Rework the title bar layout around a dedicated spacer | larger UI diff for a narrow hit-testing bug
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep drag fallback limited to true empty gutter hits; do not trigger it from interactive tab descendants
Tested: bun run test src/components/layout/TabBar.test.tsx; bun run lint; bun run build; manual macOS app verification
Not-tested: Windows runtime drag behavior was not manually exercised after this change
Related: #92
- Tab drag-and-drop reordering with visual drop indicator
- Add moveTab action to tabStore with localStorage persistence
- Context menu: add "Close Left" and "Close All" options
- Add i18n translations for new menu items (en/zh)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- TabBar: darker background (surface-container), active tab uses top brand
accent + lighter bg, consistent bottom border, draggable empty area
- Settings sidebar width matches TAB_WIDTH (180px) for vertical alignment
- Remove rounded corners and side borders from tabs for cleaner look
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The 38px absolute drag overlay was blocking tab clicks, requiring
padding that created a visible gap. Sidebar already handles its own
drag region, and TabBar uses data-tauri-drag-region directly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Move Tauri title bar padding into TabBar instead of main container,
eliminating the double spacing (38px gap + 36px tab bar)
- Remove StatusBar entirely (project/model info already in ChatInput)
- TabBar renders a drag region spacer even when no tabs are open
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Settings and Scheduled Tasks now open as special tabs in the TabBar,
matching IDE conventions (closeable, icon-prefixed, persistent)
- New Session directly creates a session with the current workDir
- ChatInput shows DirectoryPicker before first message, locks after
- Remove connection status from StatusBar (unnecessary noise)
- ContentRouter routes by tab type instead of activeView
- Settings page no longer has a back-button header
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
