feat: add DELETE /api/repos/{repo_id} endpoint

Cleans up FTS index before CASCADE-deleting the repository and all
child rows (pages, graph, symbols, git metadata, decisions, etc.).

Author: Selene29

packages/server/src/repowise/server/routers/repos.py

@@ -17,7 +17,7 @@
     Page,
     Repository,
 )
-from repowise.server.deps import get_db_session, verify_api_key
+from repowise.server.deps import get_db_session, get_fts, verify_api_key
 from repowise.server.job_executor import execute_job
 from repowise.server.schemas import RepoCreate, RepoResponse, RepoStatsResponse, RepoUpdate
 
@@ -94,6 +94,30 @@ async def update_repo(
     return RepoResponse.from_orm(repo)
 
 
+@router.delete("/{repo_id}")
+async def delete_repo(
+    repo_id: str,
+    session: AsyncSession = Depends(get_db_session),  # noqa: B008
+    fts=Depends(get_fts),  # noqa: B008
+) -> dict:
+    """Delete a repository and all its data."""
+    repo = await crud.get_repository(session, repo_id)
+    if repo is None:
+        raise HTTPException(status_code=404, detail="Repository not found")
+
+    # Collect page IDs before CASCADE deletes the Page rows
+    page_ids = await crud.list_page_ids(session, repo_id)
+
+    # Clean up FTS index (FTS5 virtual table has no FK cascade)
+    if fts is not None:
+        await fts.delete_many(page_ids)
+
+    # Delete repository — CASCADE handles all child ORM tables
+    await crud.delete_repository(session, repo_id)
+
+    return {"ok": True, "deleted_pages": len(page_ids)}
+
+
 @router.get("/{repo_id}/stats", response_model=RepoStatsResponse)
 async def get_repo_stats(
     repo_id: str,

tests/unit/server/test_repos.py

@@ -125,3 +125,22 @@ async def test_full_resync_duplicate_returns_409(client: AsyncClient) -> None:
 
         resp2 = await client.post(f"/api/repos/{repo['id']}/full-resync")
         assert resp2.status_code == 409
+
+
+@pytest.mark.asyncio
+async def test_delete_repo_success(client: AsyncClient) -> None:
+    repo = await create_test_repo(client)
+    resp = await client.delete(f"/api/repos/{repo['id']}")
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["ok"] is True
+
+    # Verify repo is gone
+    resp = await client.get(f"/api/repos/{repo['id']}")
+    assert resp.status_code == 404
+
+
+@pytest.mark.asyncio
+async def test_delete_repo_not_found(client: AsyncClient) -> None:
+    resp = await client.delete("/api/repos/nonexistent")
+    assert resp.status_code == 404