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/core/utils/cloud_sync.py

@@ -165,6 +165,69 @@ class GiteaSync:
         existing_sha = self.file_exists(remote_path)
         return self.push_file(remote_path, content, message, sha=existing_sha)
 
+    def push(self) -> str:
+        """推送本地数据到云端：product_cache.json + barcode_mappings.json"""
+        import os
+        from pathlib import Path
+
+        project_root = Path(__file__).resolve().parent.parent.parent.parent
+
+        results = []
+        # 1. Product cache
+        from app.core.db.product_db import ProductDatabase
+        excel_source = str(project_root / "templates" / "商品资料.xlsx")
+        db_path = str(project_root / "data" / "product_cache.db")
+        product_db = ProductDatabase(db_path, excel_source)
+        product_data = product_db.export_for_sync()
+        sha = self.push_json("product_cache.json", product_data, "sync: update product cache")
+        results.append(f"product_cache: {'ok' if sha else 'skip'}")
+
+        # 2. Barcode mappings
+        barcode_path = project_root / "config" / "barcode_mappings.json"
+        if barcode_path.exists():
+            with open(barcode_path, "r", encoding="utf-8") as f:
+                barcode_data = json.loads(f.read())
+            sha = self.push_json("barcode_mappings.json", barcode_data, "sync: update barcode mappings")
+            results.append(f"barcode_mappings: {'ok' if sha else 'skip'}")
+
+        return "; ".join(results) if results else "无数据需要同步"
+
+    def pull(self) -> str:
+        """从云端拉取数据并写入本地文件"""
+        import os
+        from pathlib import Path
+
+        project_root = Path(__file__).resolve().parent.parent.parent.parent
+
+        results = []
+        # 1. Product cache
+        result = self.pull_json("product_cache.json")
+        if result is not None:
+            data, sha = result
+            from app.core.db.product_db import ProductDatabase
+            excel_source = str(project_root / "templates" / "商品资料.xlsx")
+            db_path = str(project_root / "data" / "product_cache.db")
+            os.makedirs(os.path.dirname(db_path), exist_ok=True)
+            product_db = ProductDatabase(db_path, excel_source)
+            count = product_db.import_from_sync(data)
+            results.append(f"product_cache: 导入 {count} 条")
+        else:
+            results.append("product_cache: 云端无数据")
+
+        # 2. Barcode mappings
+        barcode_result = self.pull_json("barcode_mappings.json")
+        if barcode_result is not None:
+            barcode_data, sha = barcode_result
+            barcode_path = project_root / "config" / "barcode_mappings.json"
+            barcode_path.parent.mkdir(parents=True, exist_ok=True)
+            with open(barcode_path, "w", encoding="utf-8") as f:
+                json.dump(barcode_data, f, ensure_ascii=False, indent=2)
+            results.append(f"barcode_mappings: 已更新")
+        else:
+            results.append("barcode_mappings: 云端无数据")
+
+        return "; ".join(results) if results else "无数据需要同步"
+
     @classmethod
     def from_config(cls, config) -> Optional["GiteaSync"]:
         """从 ConfigManager 创建实例