[D7] Fix AI config delayed model set crash on close

Author: inliver233

issues/2026-02-10_23-01-37-ui-autosave-streaming-v2.csv

@@ -5,4 +5,4 @@ D3,Bottom status bar separator/overlap cleanup,Reduce stacked separator lines an
 D4,"Max tokens UI supports >=1,000,000","Ensure AI配置中心的最大tokens输入允许很大的值（>=1,000,000）且不会出现输入首位数字就被限制/截断的问题；保存/加载配置保持一致。添加pytest-qt回归测试。","Max tokens can be set to 1,000,000+ and persists after reopening AI配置中心; regression test passes.",.tmp\\ane0305-venv-311\\Scripts\\python.exe -m pytest -q tests/test_ai_config_max_tokens_range.py,none,DONE,DONE,TODO,src/gui/ai/unified_ai_config_dialog.py | tests/test_ai_config_max_tokens_range.py,none,user_report: max_tokens max=3999 and typing '4' clamps; verify and prevent regression | test:.tmp\\ane0305-venv-311\\Scripts\\python.exe -m pytest -q tests/test_ai_config_max_tokens_range.py PASS | done_at:2026-02-10
 D5,Verify provider streaming specs + docs/tests,Use official docs (OpenAI/Anthropic/Gemini) to verify streaming endpoints/headers/params and SSE parsing requirements; adjust provider strategies and AIClient stream parsing if needed; add a short doc summary and tests for OpenAI+Claude streaming fixtures.,Provider streaming endpoints/params match official docs as of 2026-02-10; OpenAI/Claude streaming extraction tests pass; doc added.,.tmp\\ane0305-venv-311\\Scripts\\python.exe -m pytest -q tests/test_provider_streaming_openai_claude.py,manual,DONE,DONE,TODO,src/core/ai_client.py | src/core/ai_providers/openai.py | src/core/ai_providers/claude.py | src/core/ai_providers/gemini.py | docs/ai/streaming_providers.md | tests/test_provider_streaming_openai_claude.py,none,requires web research for up-to-date streaming specs; keep tests offline via fixtures | test:.tmp\ane0305-venv-311\Scripts\python.exe -m pytest -q tests/test_provider_streaming_openai_claude.py PASS | doc:docs/ai/streaming_providers.md | done_at:2026-02-10
 D6,Ghost accept formatting test aligns with Deep overlay,Update ghost accept formatting regression test to match DeepIntegratedGhostText (non-destructive overlay). Stop relying on OptimalGhostText internal positions/formatting; assert document text unchanged before accept and accepted inserted text uses normal formatting.,tests/test_ghost_text_accept_formatting.py passes; verifies ghost preview does not mutate document and accepted text formatting matches normal text in dark theme.,.tmp\\ane0305-venv-311\\Scripts\\python.exe -m pytest -q tests/test_ghost_text_accept_formatting.py,none,DONE,DONE,TODO,tests/test_ghost_text_accept_formatting.py,none,regression_fail: AttributeError _ghost_start_pos after switching default ghost system to Deep overlay | test:.tmp\ane0305-venv-311\Scripts\python.exe -m pytest -q tests/test_ghost_text_accept_formatting.py PASS | done_at:2026-02-10
-D7,Fix AI config delayed model set crash on close,Replace QTimer.singleShot delayed model selection with a dialog-owned QTimer (or guard) so it cannot call into deleted widgets; prevents Qt event loop exceptions during fast open/close flows.,Backup service create-backup-set test runs without Qt event loop exceptions; delayed model set does not crash when dialog closes quickly.,.tmp\\ane0305-venv-311\\Scripts\\python.exe -m pytest -q tests/test_backup_service_create_backup_set.py::test_create_backup_set_backs_up_project_and_vectors,none,TODO,TODO,TODO,src/gui/ai/unified_ai_config_dialog.py,none,regression_fail: QTimer.singleShot calling _set_model_delayed after dialog destroyed -> QComboBox deleted RuntimeError
+D7,Fix AI config delayed model set crash on close,Replace QTimer.singleShot delayed model selection with a dialog-owned QTimer (or guard) so it cannot call into deleted widgets; prevents Qt event loop exceptions during fast open/close flows.,Backup service create-backup-set test runs without Qt event loop exceptions; delayed model set does not crash when dialog closes quickly.,.tmp\\ane0305-venv-311\\Scripts\\python.exe -m pytest -q tests/test_backup_service_create_backup_set.py::test_create_backup_set_backs_up_project_and_vectors,none,DONE,DONE,TODO,src/gui/ai/unified_ai_config_dialog.py,none,regression_fail: QTimer.singleShot calling _set_model_delayed after dialog destroyed -> QComboBox deleted RuntimeError | test:.tmp\ane0305-venv-311\Scripts\python.exe -m pytest -q tests/test_backup_service_create_backup_set.py::test_create_backup_set_backs_up_project_and_vectors PASS | done_at:2026-02-10

src/gui/ai/unified_ai_config_dialog.py

@@ -160,9 +160,20 @@ class UnifiedAPIConfigWidget(QFrame):
     def __init__(self, parent=None):
         super().__init__(parent)
         self._test_worker = None
+        self._pending_model: str | None = None
+        self._set_model_timer = QTimer(self)
+        self._set_model_timer.setSingleShot(True)
+        self._set_model_timer.timeout.connect(self._apply_pending_model)
         self._provider_presets = {}  # 先初始化为空字典
         self._load_provider_presets()  # 加载预设配置
         self._init_ui()  # 然后创建UI
+
+    def _apply_pending_model(self) -> None:
+        model = (self._pending_model or "").strip()
+        self._pending_model = None
+        if not model:
+            return
+        self._set_model_delayed(model)
 
     def _init_ui(self):
         """初始化UI"""
@@ -559,7 +570,12 @@ def set_config(self, config: Dict[str, Any]):
         # 设置模型（先触发provider变化，再设置模型）
         model = config.get("model", "")
         if model and hasattr(self, '_model_combo'):
-            QTimer.singleShot(100, lambda: self._set_model_delayed(model))
+            self._pending_model = str(model)
+            try:
+                self._set_model_timer.stop()
+                self._set_model_timer.start(100)
+            except Exception:
+                QTimer.singleShot(100, lambda: self._set_model_delayed(str(model)))
 
         if hasattr(self, '_temperature_slider'):
             self._temperature_slider.setValue(int(config.get("temperature", 0.8) * 100))
@@ -572,7 +588,14 @@ def set_config(self, config: Dict[str, Any]):
 
     def _set_model_delayed(self, model: str):
         """延迟设置模型（等待模型列表更新）"""
-        self._model_combo.setCurrentText(model)
+        try:
+            combo = getattr(self, "_model_combo", None)
+            if not combo:
+                return
+            combo.setCurrentText(model)
+        except RuntimeError:
+            # The widget might have been destroyed before the delayed callback fires.
+            return
 
     def _save_current_scheme(self):
         """保存当前配置方案"""