fix: sync/barcode/memory overhaul + detailed logs + preview + result tracking

- Sync: fix GiteaSync constructor + add push()/pull() methods
- Barcode: two-tab layout matching GUI (mapping + special rules)
- Memory: spec→specification unification, manual add, confidence/price tracking
- Processing: TaskLogHandler captures detailed logs (barcode mapping, unit conversion)
- Preview: fullscreen dialog for file preview (image/Excel) in Orders/Tables/Images
- Detail: per-file log filtering in file pages
- Tasks: result files now per-task, add copy path button
- Config: reactive edited state + save_config fix
- Dashboard: sync task isolation, log limit 10

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/config/settings.py

@@ -105,23 +105,24 @@ class ConfigManager:
     
     def save_config(self) -> None:
         """保存配置到文件（API 密钥不写入文件）"""
-        try:
-            # 保存前临时清空 API 密钥，避免写入文件
-            saved_keys = {}
-            for option in ('api_key', 'secret_key'):
+        # 保存前临时清空 API 密钥，避免写入文件
+        saved_keys = {}
+        for option in ('api_key', 'secret_key'):
+            try:
                 saved_keys[option] = self.config.get('API', option, fallback='')
-                self.config.set('API', option, '')
+            except Exception:
+                saved_keys[option] = ''
+            self.config.set('API', option, '')
 
+        try:
             with open(self.config_file, 'w', encoding='utf-8') as f:
                 self.config.write(f)
-
-            # 恢复内存中的值
-            for option, val in saved_keys.items():
-                self.config.set('API', option, val)
-
             logger.info(f"配置已保存到: {self.config_file}")
-        except Exception as e:
-            logger.error(f"保存配置文件时出错: {e}")
+        finally:
+            # 恢复内存中的值（即使写入失败也恢复）
+            for option, val in saved_keys.items():
+                if val:
+                    self.config.set('API', option, val)
     
     def get(self, section: str, option: str, fallback: Any = None) -> Any:
         """获取配置值"""