fix: update regenerate route to use image_paths for mosaic cover

Made-with: Cursor

src/routes/issues.py

@@ -3,7 +3,7 @@ import json
 from flask import Blueprint, render_template, send_file, redirect, url_for, flash
 
 from app import db
-from src.models import Issue, Article
+from src.models import Issue, Article, Image
 from src.cover import generate_cover
 from src.epub_builder import build_epub
 import config
@@ -112,14 +112,22 @@ def regenerate(issue_id):
         a.title for a in articles_for_issue
         if "Obituaries" not in json.loads(a.categories)
     ]
-    categories_list = []
+
+    image_paths = []
     for a in articles_for_issue:
-        categories_list.extend(json.loads(a.categories))
+        first_image = Image.query.filter_by(article_id=a.id).first()
+        if first_image:
+            image_paths.append(first_image.local_path)
+
+    cover_method = issue.cover_method
+    if cover_method == "ai":
+        issue.cover_method = "mosaic"
+        cover_method = "mosaic"
 
     try:
         cover_path = generate_cover(
-            issue.cover_method, config.ISSUES_DIR,
-            issue.week_start, issue.week_end, headlines, categories_list
+            cover_method, config.ISSUES_DIR,
+            issue.week_start, issue.week_end, headlines, image_paths
         )
         epub_path = build_epub(
             issue.week_start, issue.week_end, article_ids,