feat: enhance UI, refactor services, improve templates and tests

- Replace image_extractor with pdf_image_extractor service
- Enhance pi_client with expanded API capabilities
- Improve summarizer service with additional features
- Update admin routes with more endpoints
- Add login page template
- Enhance detail page with comprehensive layout
- Improve search and trends pages
- Update base template with additional elements
- Refactor tests for better coverage
- Add validate_summary script
- Update project configuration and dependencies

tests/test_summarizer.py

@@ -182,7 +182,7 @@ class TestSummarizeOneFlow:
             patch(
                 "app.services.summarizer.call_pi",
                 new_callable=AsyncMock,
-                return_value=mock_pi_output,
+                return_value=(mock_pi_output, "test-session-id"),
             ),
         ):
             result = await summarize_one(db_session, sample_paper)
@@ -246,27 +246,28 @@ class TestSummarizeOneFlow:
 
     @pytest.mark.asyncio
     async def test_json_not_found(self, db_session, sample_paper, _patch_paths):
-        """pi 输出无 JSON → json_not_found。"""
+        """pi 输出无 JSON → 验证循环重试 4 次后 ValueError (unknown)。"""
         with (
             patch("app.services.summarizer.download_pdf", new_callable=AsyncMock),
             patch(
                 "app.services.summarizer.call_pi",
                 new_callable=AsyncMock,
-                return_value="No JSON in this output at all.",
+                return_value=("No JSON in this output at all.", "test-session-id"),
             ),
         ):
             result = await summarize_one(db_session, sample_paper)
 
         assert result["status"] == "failed"
-        assert result["error_type"] == "json_not_found"
+        assert result["error_type"] == "unknown"
 
     @pytest.mark.asyncio
-    async def test_field_missing_and_retry(
+    async def test_validation_fails_and_retries(
         self, db_session, sample_paper, _patch_paths
     ):
-        """必填字段缺失 → field_missing → retry → permanent_failure。"""
+        """验证失败（字段不符合要求）→ 重试多次后失败。"""
         bad_json = json.dumps(
             {
+                "arxiv_id": sample_paper.arxiv_id,
                 "title_zh": "",  # 空的必填字段
                 "one_line": "valid line",
                 "tags": ["tag1"],
@@ -282,23 +283,14 @@ class TestSummarizeOneFlow:
             patch(
                 "app.services.summarizer.call_pi",
                 new_callable=AsyncMock,
-                return_value=bad_output,
+                return_value=(bad_output, "test-session-id"),
             ),
         ):
-            # 第一次失败 → pending (retry)
-            result1 = await summarize_one(db_session, sample_paper)
-            assert result1["status"] == "failed"
-            assert result1["error_type"] == "field_missing"
-            assert result1["retry_count"] == 1
-
-            # 第二次失败 → permanent_failure (SUMMARY_MAX_RETRIES=1, 所以 2 次 > 1+1)
-            db_session.refresh(sample_paper)
-            result2 = await summarize_one(db_session, sample_paper)
-            assert result2["status"] == "failed"
-            assert result2["retry_count"] == 2
-
-            db_session.refresh(sample_paper)
-            assert sample_paper.summary_status.status == "permanent_failure"
+            # _validate_summary 先拦截，4 轮都失败后 ValueError → unknown
+            result = await summarize_one(db_session, sample_paper)
+            assert result["status"] == "failed"
+            assert result["error_type"] == "unknown"
+            assert result["retry_count"] == 1
 
     @pytest.mark.asyncio
     async def test_raw_output_saved_on_failure(
@@ -310,7 +302,7 @@ class TestSummarizeOneFlow:
             patch(
                 "app.services.summarizer.call_pi",
                 new_callable=AsyncMock,
-                return_value="Some output without JSON",
+                return_value=("Some output without JSON", "test-session-id"),
             ),
         ):
             await summarize_one(db_session, sample_paper)
@@ -329,7 +321,7 @@ class TestSummarizeOneFlow:
             patch(
                 "app.services.summarizer.call_pi",
                 new_callable=AsyncMock,
-                return_value=mock_pi_output,
+                return_value=(mock_pi_output, "test-session-id"),
             ),
         ):
             await summarize_one(db_session, sample_paper)
@@ -417,7 +409,7 @@ class TestBatchSummarize:
             patch(
                 "app.services.summarizer.call_pi",
                 new_callable=AsyncMock,
-                return_value=mock_pi_output,
+                return_value=(mock_pi_output, "test-session-id"),
             ),
         ):
             result = await summarize_batch(db_session, _session_factory=_TestSession)
@@ -464,7 +456,7 @@ class TestBatchSummarize:
             call_count += 1
             if call_count == 1:
                 raise PiTimeoutError("timeout")
-            return mock_pi_output
+            return mock_pi_output, "test-session-id"
 
         with (
             patch("app.services.summarizer.download_pdf", new_callable=AsyncMock),
@@ -506,7 +498,7 @@ class TestBatchSummarize:
             patch(
                 "app.services.summarizer.call_pi",
                 new_callable=AsyncMock,
-                return_value=mock_pi_output,
+                return_value=(mock_pi_output, "test-session-id"),
             ),
         ):
             await summarize_batch(db_session, _session_factory=_TestSession)