fix(ci): improve AI code review workflow - fix bugs, robustness, and YAML syntax

Author: watney1024

.github/workflows/ai-code-review.yml

@@ -108,7 +108,7 @@ jobs:
                     {role: "user", content: $user}
                   ],
                   stream: false
-                }')
+                }') || { echo "  [ERROR] Failed to build JSON payload for $FILE"; continue; }
 
               # ── Call SenseNova API ──
               if [ "${FILE_COUNT:-0}" -gt 0 ]; then