fix(gitea-review): PR/push AI analysis always failing — 兩個根因修復

Root cause 1 (push review): local_code_review_service.review_push() 回傳
dict，但呼叫端直接存取 analysis.issues → AttributeError。
修復：_call_openclaw_push_review 將 dict 轉成 CodeReviewResult。

Root cause 2 (PR review): openclaw_http_service 呼叫
/api/v1/analyze/code-review 但 OpenClaw 從未實作此 endpoint（404）。
修復：_call_openclaw_code_review 改走 local_code_review_service.review_pr()
（Ollama qwen2.5-coder + Gemini fallback）。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/services/gitea_webhook_service.py

@@ -214,22 +214,27 @@ class GiteaWebhookService:
         Phase 22 P0 修復: 使用 OpenClawHttpService (2026-03-31)
         """
         try:
-            from src.services.openclaw_http_service import get_openclaw_http_service
-            service = get_openclaw_http_service()
-            data = await service.code_review(
-                repo_name=repo_name,
-                pr_title=pr_title,
-                pr_body=pr_body,
-                diff_content=diff_content,
-                changed_files=changed_files,
-                additions=additions,
-                deletions=deletions,
-                prefer_local=True,
-                timeout=120.0,
+            from src.services.local_code_review_service import get_local_code_review_service
+            svc = get_local_code_review_service()
+            pr_id = f"{repo_name}-{pr_title[:20]}"
+            result = await svc.review_pr(
+                pr_id=pr_id,
+                repo=repo_name,
+                title=pr_title,
+                diff=diff_content,
             )
-
-            if data:
-                return CodeReviewResult(**data)
+            if result and isinstance(result, dict):
+                review_text = result.get("review_text", "")
+                issues_count = result.get("issues_count", 0)
+                return CodeReviewResult(
+                    summary=review_text[:300] if review_text else "PR review completed",
+                    issues=[{"text": line} for line in review_text.split("\n") if "⚠️" in line],
+                    suggestions=[],
+                    security_concerns=[],
+                    quality_score=max(0.0, 100.0 - issues_count * 15),
+                    analyzed_by=result.get("model", "ollama"),
+                    confidence=0.7,
+                )
             return None
 
         except Exception as e:
@@ -268,7 +273,20 @@ class GiteaWebhookService:
                 commit_summary=commit_msgs,
                 files_summary=files_summary,
             )
-            return result
+            # local_code_review_service 回傳 dict，需轉成 CodeReviewResult
+            if result and isinstance(result, dict):
+                issues_count = result.get("issues_count", 0)
+                review_text = result.get("review_text", "")
+                return CodeReviewResult(
+                    summary=review_text[:300] if review_text else "Push review completed",
+                    issues=[{"text": line} for line in review_text.split("\n") if "⚠️" in line],
+                    suggestions=[],
+                    security_concerns=[],
+                    quality_score=max(0.0, 100.0 - issues_count * 15),
+                    analyzed_by=result.get("model", "ollama"),
+                    confidence=0.7,
+                )
+            return result  # type: ignore[return-value]  # None case
 
         except Exception as e:
             logger.exception("openclaw_push_review_error", error=str(e))