fix: resolve architecture validation errors and warnings

- Move database operations from API to service layer:
  - Add create_pending_scan() method to code_quality_service
  - Add get_running_scans() method to code_quality_service
  - Update API to use service methods instead of direct db queries
- Replace inline SVG spinner with $icon('spinner', ...) helper
- Add comment documenting custom dropdown exception

Validation now passes with 0 errors.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/api/v1/admin/code_quality.py

@@ -4,7 +4,7 @@ RESTful API for code quality validation and violation management
 Supports multiple validator types: architecture, security, performance
 """
 
-from datetime import UTC, datetime
+from datetime import datetime
 from enum import Enum
 
 from fastapi import APIRouter, BackgroundTasks, Depends, Query
@@ -214,15 +214,10 @@ async def trigger_scan(
     triggered_by = f"manual:{current_user.username}"
 
     for vtype in request.validator_types:
-        # Create scan record with pending status
-        scan = ArchitectureScan(
-            timestamp=datetime.now(UTC),
-            validator_type=vtype.value,
-            status="pending",
-            triggered_by=triggered_by,
+        # Create scan record with pending status via service
+        scan = code_quality_service.create_pending_scan(
+            db, validator_type=vtype.value, triggered_by=triggered_by
         )
-        db.add(scan)
-        db.flush()  # Get scan.id
 
         # Queue background task
         background_tasks.add_task(execute_code_quality_scan, scan.id)
@@ -257,7 +252,7 @@ async def get_scan_status(
 
     Use this endpoint to poll for scan completion.
     """
-    scan = db.query(ArchitectureScan).filter(ArchitectureScan.id == scan_id).first()
+    scan = code_quality_service.get_scan_by_id(db, scan_id)
     if not scan:
         raise ScanNotFoundException(scan_id)
 
@@ -274,12 +269,7 @@ async def get_running_scans(
 
     Returns scans with status 'pending' or 'running'.
     """
-    scans = (
-        db.query(ArchitectureScan)
-        .filter(ArchitectureScan.status.in_(["pending", "running"]))
-        .order_by(ArchitectureScan.timestamp.desc())
-        .all()
-    )
+    scans = code_quality_service.get_running_scans(db)
     return [_scan_to_response(scan) for scan in scans]