Settings import, editor tabs, Windows git fixes

[GlamgarOnDiscord]

Context

Several UX and Windows-specific issues in Sinew settings, editor tabs, git integration, and the chat composer. This PR groups related fixes without touching PR #11 (editor tab context menu).

Windows / platform

Git panel console leak — On Windows, spawning git and gh without CREATE_NO_WINDOW opened a new console window per subprocess; heavy git panel use stacked hundreds of windows. All subprocess launches now use the no-window flag, with cached binary paths via OnceLock.

Path normalization — Long paths and \\?\ prefixes broke Explorer reveal and shell commands. path_for_shell / display_path_string strip the prefix before UI display and explorer /select.

Explorer reveal — Reveal used exit-code checks that failed even when Explorer opened correctly; switched to fire-and-forget .spawn() on Windows.

Settings — skills & sub-agents

Backend import

• Skills: import_skills_from_provider copies from Claude (~/.claude/skills, project .claude/skills) and Codex (~/.codex/skills, project paths) into {workspace}/.agents/skills, skipping the workspace target as a Codex source to avoid loops.
• Sub-agents: import_sub_agents_from_provider reads Claude .md agents from ~/.claude/agents and {workspace}/.claude/agents, parses YAML frontmatter, maps model aliases (opus/sonnet/haiku), persists via existing settings store. SubAgentConfig gains source / sourcePath for traceability.

UI (Settings pane)

• Import pickers with provider icons (Anthropic / OpenAI), green status tones, search/filter lists, enable toggles, markdown preview for sub-agents.
• “Reveal in Explorer” on skill/sub-agent paths.
• Container queries on settings-body: stacks below 680px, doc/list split below 520px, icon-only actions below 400px — usable with chat pane open.

Editor tabs

HTML5 drag-and-drop is unreliable in WebView2. Reorder uses pointer events with a 6px movement threshold before drag starts; click-to-activate runs on pointerup when the threshold was not exceeded (fixes tabs that only worked after drag). Shared helpers in src/lib/editorTabs.ts.

Chat composer

Textarea auto-grows with content (multiline paste/wrap) instead of a fixed height cap.

Commits (5)

1. fix(windows): hide git subprocess consoles and normalize paths for reveal
2. feat(settings): import skills and Claude sub-agents into workspace
3. feat(settings): import UI, status tones, and responsive skills/sub-agents panes
4. fix(editor): pointer tab reorder without breaking click-to-activate
5. feat(chat): auto-grow composer height with content

Test plan

• Windows / Git — Open Git panel, refresh/status/diff several times: no new cmd/git console windows.
• Reveal — Skills or sub-agent with a long path: “Reveal in Explorer” opens the correct file (no false error toast).
• Skills import — Import from Claude and Codex; files land under .agents/skills; duplicates handled sensibly; Codex does not re-import from workspace target.
• Sub-agents import — Import from Claude; list shows name/description; preview renders markdown; enable/disable persists after restart.
• Settings layout — Narrow settings column and with chat open: import buttons stack, list + detail remain usable.
• Editor tabs — Single click switches tab; drag after small movement reorders; cursor pointer vs grabbing correct.
• Composer — Paste 10+ lines: textarea grows; send still works; no layout jump in message list.

Notes

• Independent of PR Add context menu actions for editor tabs #11.
• src-tauri/gen/schemas/windows-schema.json added by Tauri codegen on Windows builds.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.