Add SEO fields to Tasks model, improve content generation response handling, and enhance progress bar animation

- Added primary_keyword, secondary_keywords, tags, and categories fields to Tasks model
- Updated generate_content function to handle full JSON response with all SEO fields
- Improved progress bar animation: smooth 1% increments every 300ms
- Enhanced step detection for content generation vs clustering vs ideas
- Fixed progress modal to show correct messages for each function type
- Added comprehensive logging to Keywords and Tasks pages for AI functions
- Fixed error handling to show meaningful error messages instead of generic failures

frontend/src/components/common/ProgressModal.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect } from 'react';
+import React, { useEffect, useRef } from 'react';
 import { Modal } from '../ui/modal';
 import { ProgressBar } from '../ui/progress';
 import Button from '../ui/button/Button';
@@ -34,13 +34,19 @@ export default function ProgressModal({
 }: ProgressModalProps) {
   // Auto-close on completion after 2 seconds
   // Don't auto-close on error - let user manually close to see error details
+  const hasAutoClosedRef = React.useRef(false);
   useEffect(() => {
-    if (status === 'completed' && onClose) {
+    if (status === 'completed' && onClose && !hasAutoClosedRef.current) {
+      hasAutoClosedRef.current = true;
       const timer = setTimeout(() => {
         onClose();
       }, 2000);
       return () => clearTimeout(timer);
     }
+    // Reset when status changes away from completed
+    if (status !== 'completed') {
+      hasAutoClosedRef.current = false;
+    }
     // Don't auto-close on error - user should manually dismiss
   }, [status, onClose]);