feat(pending): full-screen modal with grid cards, filters, bulk restore

Replaces sidebar pending/hidden panels with a wide modal showing
devices as cards. Adds search, segmented source/status filters,
type filter, select mode for bulk approve/hide/restore, and
keyboard shortcuts. Hidden cards click-to-restore (no approval
detour); approval no longer pops the edit modal.

Backend: new restore + bulk-restore endpoints (hidden -> pending).

backend/app/api/routes/scan.py

@@ -174,6 +174,41 @@ async def bulk_hide_devices(
     return {"hidden": len(devices), "skipped": len(payload.device_ids) - len(devices)}
 
 
+@router.post("/pending/{device_id}/restore", response_model=dict)
+async def restore_device(
+    device_id: str,
+    db: AsyncSession = Depends(get_db),
+    _: str = Depends(get_current_user),
+) -> dict[str, Any]:
+    device = await db.get(PendingDevice, device_id)
+    if not device:
+        raise HTTPException(status_code=404, detail="Device not found")
+    if device.status != "hidden":
+        raise HTTPException(status_code=409, detail="Device is not hidden")
+    device.status = "pending"
+    await db.commit()
+    return {"restored": True, "device_id": device_id}
+
+
+@router.post("/pending/bulk-restore", response_model=dict)
+async def bulk_restore_devices(
+    payload: BulkActionRequest,
+    db: AsyncSession = Depends(get_db),
+    _: str = Depends(get_current_user),
+) -> dict[str, Any]:
+    result = await db.execute(
+        select(PendingDevice).where(
+            PendingDevice.id.in_(payload.device_ids),
+            PendingDevice.status == "hidden",
+        )
+    )
+    devices = result.scalars().all()
+    for device in devices:
+        device.status = "pending"
+    await db.commit()
+    return {"restored": len(devices), "skipped": len(payload.device_ids) - len(devices)}
+
+
 @router.post("/pending/{device_id}/approve", response_model=dict)
 async def approve_device(
     device_id: str,

backend/tests/test_scan.py

@@ -140,6 +140,49 @@ async def test_hide_device(client: AsyncClient, headers, pending_device):
     assert len(hidden_res.json()) == 1
 
 
+# --- Restore hidden device ---
+
+@pytest.mark.asyncio
+async def test_restore_device(client: AsyncClient, headers, pending_device):
+    # Hide first
+    await client.post(f"/api/v1/scan/pending/{pending_device.id}/hide", headers=headers)
+
+    # Restore
+    res = await client.post(f"/api/v1/scan/pending/{pending_device.id}/restore", headers=headers)
+    assert res.status_code == 200
+    assert res.json()["restored"] is True
+
+    # Now back in pending, gone from hidden
+    pending_res = await client.get("/api/v1/scan/pending", headers=headers)
+    assert len(pending_res.json()) == 1
+    hidden_res = await client.get("/api/v1/scan/hidden", headers=headers)
+    assert hidden_res.json() == []
+
+
+@pytest.mark.asyncio
+async def test_restore_device_rejects_non_hidden(client: AsyncClient, headers, pending_device):
+    res = await client.post(f"/api/v1/scan/pending/{pending_device.id}/restore", headers=headers)
+    assert res.status_code == 409
+
+
+@pytest.mark.asyncio
+async def test_bulk_restore_devices(client: AsyncClient, headers, pending_device):
+    # Hide
+    await client.post(f"/api/v1/scan/pending/{pending_device.id}/hide", headers=headers)
+
+    res = await client.post(
+        "/api/v1/scan/pending/bulk-restore",
+        headers=headers,
+        json={"device_ids": [pending_device.id]},
+    )
+    assert res.status_code == 200
+    assert res.json()["restored"] == 1
+    assert res.json()["skipped"] == 0
+
+    pending_res = await client.get("/api/v1/scan/pending", headers=headers)
+    assert len(pending_res.json()) == 1
+
+
 # --- Ignore device ---
 
 @pytest.mark.asyncio