Fix emit_progress AttributeError

Replace non-existent emit_progress calls with proper ProgressService methods:
- start_progress for starting operations
- update_progress for progress updates
- complete_progress for successful completion
- fail_progress for failures

Convert percentage-based updates to current/total based on ProgressService API

src/server/api/auth.py

@@ -156,24 +156,34 @@ async def setup_auth(req: SetupRequest):
                 await perform_nfo_scan_if_needed(progress_service)
                 
                 # Send completion event
-                progress_service.emit_progress(
+                from src.server.services.progress_service import ProgressType
+                await progress_service.start_progress(
                     progress_id="initialization_complete",
-                    progress_type="system",
-                    status="completed",
+                    progress_type=ProgressType.SYSTEM,
                     title="Initialization Complete",
+                    total=100,
+                    message="All initialization tasks completed successfully",
+                    metadata={"initialization_complete": True}
+                )
+                await progress_service.complete_progress(
+                    progress_id="initialization_complete",
                     message="All initialization tasks completed successfully",
-                    percent=100,
                     metadata={"initialization_complete": True}
                 )
             except Exception as e:
                 # Send error event
-                progress_service.emit_progress(
+                from src.server.services.progress_service import ProgressType
+                await progress_service.start_progress(
                     progress_id="initialization_error",
-                    progress_type="error",
-                    status="failed",
+                    progress_type=ProgressType.ERROR,
                     title="Initialization Failed",
+                    total=100,
                     message=str(e),
-                    percent=0,
+                    metadata={"initialization_complete": True, "error": str(e)}
+                )
+                await progress_service.fail_progress(
+                    progress_id="initialization_error",
+                    error_message=str(e),
                     metadata={"initialization_complete": True, "error": str(e)}
                 )