feat: workspace-first UI refresh - PR-1 backend endpoints

- Add FileService for workspace-scoped file operations
- Add GitOperations service for workspace-scoped git commands
- Add workspace_files API: GET/POST /workspaces/{id}/files
- Add workspace_git API: status, branches, commit, push, pull, fetch, checkout, history
- Add workspace_instances API: list instances per workspace
- Add top-level POST /workspaces/ (accepts repo_id directly)
- Enrich GET /projects/ with nested repositories and workspaces
- Register all new routers in main.py
- 23 tests passing (17 existing + 6 new)

Quality gates: ruff clean
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# Spec: Workspace-First UI Refresh
## Status
| Field | Value |
|---|---|
| Phase | **Spec** |
| Based on | [Proposal](proposal.md) |
| Next | Design |
## Overview
Replace the old "Repository Workspace" (direct repo file browser) with a **Workspace-First** model. The workspace detail page becomes the primary work surface. Projects page shows inline repos + workspaces. Old `repo-workspace.tsx` is deleted.
## Decisions
| # | Question | Answer |
|---|---|---|
| 1 | URL structure | `/workspaces/:id` (flat) |
| 2 | Sidebar nav order | Workspaces → Projects |
| 3 | New Workspace flow | Inline form on project page |
| 4 | Branch switching | Dropdown in workspace header |
| 5 | Empty tool state | "Start a tool" prompt card |
| 6 | Mobile tabs | Files / Git / Tools / Settings |
| 7 | Git toolbar | Collapsible top bar on Files tab |
| 8 | Git tab content | History, diff, full commit log |
## User Flows
### Flow 1: Open a Project
1. User clicks "Projects" in sidebar
2. Sees project cards with inline repositories
3. Each repo shows its workspaces as clickable cards
4. User clicks a workspace → navigates to `/workspaces/:id`
### Flow 2: Work in a Workspace
1. User is on `/workspaces/:id`
2. **Files tab** (default): File tree (left) + file viewer/editor (right). Git toolbar at top.
3. User edits a file, commits via git toolbar
4. **Git tab**: Full history, diff view, detailed commit log
5. **Tools tab**: See running instances, click "Start Tool" → inline modal
6. **Settings tab**: Sync workspace, rename, delete
### Flow 3: Create a Workspace
1. User on Projects page, expands a repo
2. Clicks "+ New Workspace" next to a repo
3. Inline form appears: name input, branch dropdown
4. Submits → workspace created, appears in list
### Flow 4: Start a Tool
1. User on workspace detail, Tools tab
2. If no instances: "Start a tool on this workspace" card
3. If instances: list of cards + "Start Another" button
4. Click → inline modal: tool type picker, config profile (optional)
5. Submit → instance created, appears in list with status
## Backend API
### New Endpoints (workspace-scoped)
All endpoints operate on the workspace clone path (`workspace.path`).
```
# Files
GET /workspaces/{workspace_id}/files?path=&branch=
→ List directory entries
GET /workspaces/{workspace_id}/files/content?path=&branch=
→ Get file content
POST /workspaces/{workspace_id}/files/content
Body: { path, content, message }
→ Commit file change
# Git
GET /workspaces/{workspace_id}/git/status
→ { modified, added, deleted, untracked, branch }
GET /workspaces/{workspace_id}/git/branches
→ { branches, default_branch, current_branch }
POST /workspaces/{workspace_id}/git/commit
Body: { message, files? }
→ Commit staged changes
POST /workspaces/{workspace_id}/git/push
→ Push current branch
POST /workspaces/{workspace_id}/git/pull
→ Pull current branch
POST /workspaces/{workspace_id}/git/fetch
→ Fetch from origin
POST /workspaces/{workspace_id}/git/checkout
Body: { branch }
→ Switch branch
GET /workspaces/{workspace_id}/git/history
Query: ?path=&limit=50
→ Commit history for file or entire repo
# Tools (instances on this workspace)
GET /workspaces/{workspace_id}/instances
→ List tool instances using this workspace
POST /workspaces/{workspace_id}/instances
Body: { tool_type_id, display_name?, config_profile_id? }
→ Create instance on this workspace
```
### Existing Endpoints (unchanged)
```
GET /workspaces/
POST /workspaces/ (body: { repo_id, name, branch })
DELETE /workspaces/{id}
POST /workspaces/{id}/sync
PATCH /workspaces/{id}
```
Note: `POST /workspaces/` now accepts `repo_id` directly instead of nested under `/projects/{pid}/repositories/{rid}/workspaces`.
### Modified Endpoints
```
GET /projects/
→ Now includes `repositories` array with `workspaces` sub-array
```
## Database Schema
No changes. Existing `workspaces` table is sufficient.
## Frontend Routes
```
/ → Dashboard (unchanged)
/workspaces → All workspaces list (refreshed)
/workspaces/:id → Workspace detail (NEW, replaces repo-workspace)
/projects → Projects list (refreshed)
/projects/:id → Project detail with repos + workspaces (NEW)
/sessions → Sessions list (unchanged)
/settings → Settings (unchanged)
```
## UI Components
### WorkspaceDetailPage (`/workspaces/:id`)
```
┌──────────────────────────────────────────────────────────────┐
│ Breadcrumb: Projects > {project} > {repo} > {workspace} │
│ [Branch ▼ main] [Sync] [Start Tool] [Settings] │
├──────────────────────────────────────────────────────────────┤
│ Tab bar: [Files] [Git] [Tools] [Settings] │
├──────────────────────────────────────────────────────────────┤
│ │
│ {Active Tab Content} │
│ │
└──────────────────────────────────────────────────────────────┘
```
#### Files Tab (default)
```
┌──────────────────────────────────────────────────────────────┐
│ Git Toolbar (collapsible) │
│ [Modified: 3] [Staged: 2] [Commit ▼] [Push] [Pull] [Fetch] │
├──────────────┬───────────────────────────────────────────────┤
│ │ │
│ File Tree │ File Viewer / Editor │
│ (workspace │ │
│ path) │ Breadcrumbs: src > utils > helpers.ts │
│ │ │
│ 📁 src/ │ [Edit] [History] │
│ 📄 README │ │
│ │ export function ... │
│ │ │
└──────────────┴───────────────────────────────────────────────┘
```
**Git Toolbar**: Collapsible bar above file content. Shows:
- Status counters: Modified, Added, Deleted, Untracked
- Commit button (with message input when expanded)
- Push, Pull, Fetch buttons
- Branch selector dropdown
#### Git Tab
```
┌──────────────────────────────────────────────────────────────┐
│ Branch: [main ▼] [New Branch] [Merge] [Compare] │
├──────────────────────────────────────────────────────────────┤
│ │
│ Commit History │
│ ┌────────────────────────────────────────────────────┐ │
│ │ ● abc123 Fix auth middleware │ │
│ │ ● def456 Add user profile page │ │
│ │ ● 789abc Initial commit │ │
│ └────────────────────────────────────────────────────┘ │
│ │
│ [Show Diff] [Checkout] [Revert] │
│ │
└──────────────────────────────────────────────────────────────┘
```
#### Tools Tab
```
┌──────────────────────────────────────────────────────────────┐
│ Active Tool Instances │
│ │
│ ┌─────────────┐ ┌─────────────┐ [+ Start Tool] │
│ │ Code Server │ │ Terminal │ │
│ │ ● Running │ │ ● Stopped │ │
│ │ [Open] [Stop│ │ [Start] [×] │ │
│ └─────────────┘ └─────────────┘ │
│ │
│ ─ or ─ │
│ │
│ ┌────────────────────────────────────────────────────┐ │
│ │ No tools running on this workspace │ │
│ │ Start a tool to begin coding │ │
│ │ [Start Tool] │ │
│ └────────────────────────────────────────────────────┘ │
│ │
└──────────────────────────────────────────────────────────────┘
```
#### Settings Tab
```
┌──────────────────────────────────────────────────────────────┐
│ Workspace Settings │
│ │
│ Name: [my-feature-branch ] │
│ Branch: main (tracks origin/main) │
│ Path: /data/working-copies/{repo-id}/{name} │
│ Created: 2024-01-15 │
│ Last Sync: 2024-01-20 14:32 │
│ │
│ [Rename] [Sync Now] [Delete Workspace] │
│ │
└──────────────────────────────────────────────────────────────┘
```
### ProjectsPage (`/projects`)
```
┌──────────────────────────────────────────────────────────────┐
│ Projects [+ New Project] │
├──────────────────────────────────────────────────────────────┤
│ │
│ ┌────────────────────────────────────────────────────┐ │
│ │ My Web App │ │
│ │ A full-stack application │ │
│ ├────────────────────────────────────────────────────┤ │
│ │ Repositories: │ │
│ │ │ │
│ │ ▼ frontend (git@github.com:me/frontend.git) │ │
│ │ ┌──────────┐ ┌─────────────┐ [+ New Workspace] │ │
│ │ │ main │ │ feature-ui │ │ │
│ │ │ ● 2 inst │ │ ● 0 inst │ │ │
│ │ └──────────┘ └─────────────┘ │ │
│ │ │ │
│ │ ▶ backend (git@github.com:me/backend.git) │ │
│ │ ┌──────────┐ [+ New Workspace] │ │
│ │ │ main │ │ │
│ │ │ ● 1 inst │ │ │
│ │ └──────────┘ │ │
│ │ │ │
│ │ [Edit Project] [Delete] │ │
│ └────────────────────────────────────────────────────┘ │
│ │
└──────────────────────────────────────────────────────────────┘
```
**Workspace Card**: Small card showing:
- Name
- Status badge (ready/syncing/error)
- Instance count (dot + number)
- Click navigates to `/workspaces/:id`
**New Workspace Button**: Inline form on click:
```
[Name: __________] [Branch: main ▼] [Create] [Cancel]
```
### Mobile Layout
Bottom tab bar (4 tabs, always visible):
```
┌────────────────────────────────────┐
│ {Tab Content - full screen} │
│ │
│ │
│ │
├────────────────────────────────────┤
│ 📁 Files 🔀 Git 🛠 Tools ⚙ Settings│
└────────────────────────────────────┘
```
**Files tab**: File tree full screen, tap file → viewer overlay
**Git tab**: Commit history list, tap commit → diff overlay
**Tools tab**: Instance cards stacked vertically
**Settings tab**: Same as desktop settings, scrollable
## State & Data Flow
### Workspace Detail Page
```
useWorkspace(workspaceId) → fetch /workspaces/{id}
useWorkspaceFiles(workspaceId, path?, branch?) → fetch /workspaces/{id}/files
useWorkspaceGitStatus(workspaceId) → fetch /workspaces/{id}/git/status
useWorkspaceInstances(workspaceId) → fetch /workspaces/{id}/instances
```
All hooks poll/refetch on:
- Tab switch
- User action (commit, push, etc.)
- 30s background refresh
### Projects Page
```
useProjects() → fetch /projects/
useProjectWorkspaces(projectId) → derived from project.repositories.workspaces
```
## Error Handling
| Scenario | UX |
|---|---|
| Workspace not found | 404 page with "Workspace not found" + link to workspaces |
| Git operation fails | Toast with git stderr, retry button |
| File read fails | "File not found" in viewer, check if on correct branch |
| No tool types available | "No tools configured" + link to Tool Workshop |
| Workspace path missing | "Workspace files not found — try syncing" |
## Accessibility
- Tab bar: `role="tablist"`, keyboard arrow navigation
- File tree: `role="tree"`, arrow key expansion
- Git toolbar: All buttons have `aria-label`
- Focus management: Modal traps focus, returns on close
## Performance
- File tree: Virtualized for repos > 1000 files
- Git history: Paginated (50 commits per page)
- Image files: Lazy loaded in viewer
- Polling: 30s for instances, 10s for git status when visible
## Acceptance Criteria
- [ ] `repo-workspace.tsx` and related components deleted
- [ ] `/projects/:id` route shows project detail, not file browser
- [ ] `/workspaces/:id` route shows workspace detail page
- [ ] File browser reads from workspace clone path
- [ ] File viewer/editor works on workspace files
- [ ] Git toolbar on Files tab supports commit/push/pull/fetch
- [ ] Git tab shows commit history with diff
- [ ] Tools tab lists instances + spawn modal
- [ ] Settings tab shows workspace info + rename/sync/delete
- [ ] Projects page shows inline repos + workspace cards
- [ ] Inline "New Workspace" form on project page
- [ ] Mobile: 4-tab bottom navigation
- [ ] All existing tests pass or updated
- [ ] ruff clean, TypeScript clean, eslint clean