Improve opinion post: increase AI timeout + improve fallback

ai_ext.py

@@ -143,7 +143,7 @@ async def qwen_generate(prompt: str, image_url: str = None, max_tokens: int = 12
                     "https://router.huggingface.co/v1/chat/completions",
                     headers=headers,
                     json=payload,
-                    timeout=95
+                    timeout=120
                 )
                 
                 if r.status_code >= 300:
@@ -167,16 +167,29 @@ async def qwen_generate(prompt: str, image_url: str = None, max_tokens: int = 12
 
 
 def _fallback_summary_from_prompt(prompt: str, max_units: int = 6) -> str:
-    """Generate a simple fallback summary when AI is unavailable."""
+    """Generate a fallback summary incorporating opinion + sources."""
     text = prompt or ""
-    for marker in ["Nội dung nguồn:", "Nội dung bài:", "Nội dung gốc:", "Nội dung:", "Nguồn/bối cảnh internet:"]:
+    opinion = ""
+    # Extract opinion section if present
+    opinion_marker_found = False
+    for marker in ["QUAN ĐIỂM:", "Nội dung nguồn:", "Nội dung bài:", "Nguồn/bối cảnh internet:"]:
         if marker in text:
-            text = text.split(marker, 1)[1]
+            part_after = text.split(marker, 1)[1]
+            if marker == "QUAN ĐIỂM:":
+                opinion = part_after.split("\n")[0].strip()[:500]
+                opinion_marker_found = True
+                text = part_after[len(opinion)+1:] if len(part_after) > len(opinion) else ""
+            else:
+                text = part_after
             break
+    
+    # Clean up the remaining text (source content)
     text = re.sub(r"https?://\S+", "", text)
+    text = re.sub(r"===.*===\n?", "", text)
+    text = re.sub(r"[*-]\s*SLIDE\s*\d+[^\n]*\n?", "", text)
     text = re.sub(r"\s+", " ", text).strip()
     
-    # Split into sentences
+    # Build opinion-driven bullets from source sentences
     sentences = re.split(r"(?<=[.!?])\s+(?=[A-ZÀ-Ỹ0-9])", text)
     units = []
     for s in sentences:
@@ -186,6 +199,9 @@ def _fallback_summary_from_prompt(prompt: str, max_units: int = 6) -> str:
     
     if units:
         result_units = units[:max_units]
+        # Prepend opinion to first bullet if available
+        if opinion:
+            result_units[0] = f"{opinion}. {result_units[0]}"
         return "\n".join("• " + u for u in result_units)
     if text:
         chunks = []
@@ -195,8 +211,12 @@ def _fallback_summary_from_prompt(prompt: str, max_units: int = 6) -> str:
                 chunks.append(chunk)
                 if len(chunks) >= max_units:
                     break
+        if chunks and opinion:
+            chunks[0] = f"{opinion}. {chunks[0]}"
         if chunks:
             return "\n".join("• " + c for c in chunks)
+    if opinion:
+        return f"{opinion}."
     return "• Không có đủ nội dung để tóm tắt."
 
 # ===== URL scraping & article processing =====