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>

web/backend/services/db_schema.py

@@ -475,7 +475,8 @@ def upsert_file_relation(input_image: str = None, output_excel: str = None,
 
 
 def query_file_relations(view: str = None, status: str = None,
-                         page: int = 1, page_size: int = 50) -> tuple[list[dict], int]:
+                         page: int = 1, page_size: int = 50,
+                         sort_by: str = None, sort_order: str = "desc") -> tuple[list[dict], int]:
     """Query file relations with optional view filter and pagination.
 
     view='orders': only rows with result_purchase, sorted by result_purchase
@@ -508,6 +509,13 @@ def query_file_relations(view: str = None, status: str = None,
 
         where = (" WHERE " + " AND ".join(clauses)) if clauses else ""
 
+        # Sort
+        if sort_by and sort_by in ('created_at', 'updated_at', 'input_image', 'output_excel', 'result_purchase', 'status'):
+            sort_col = sort_by
+        else:
+            sort_col = order_by.split()[0] if order_by else 'id'
+        sort_dir = 'DESC' if sort_order.lower() == 'desc' else 'ASC'
+
         # Count
         row = conn.execute(
             f"SELECT COUNT(*) as cnt FROM file_relations{where}", params
@@ -518,7 +526,7 @@ def query_file_relations(view: str = None, status: str = None,
         offset = (page - 1) * page_size
         params.extend([page_size, offset])
         rows = conn.execute(
-            f"SELECT * FROM file_relations{where} ORDER BY {order_by} LIMIT ? OFFSET ?",
+            f"SELECT * FROM file_relations{where} ORDER BY {sort_col} {sort_dir} LIMIT ? OFFSET ?",
             params,
         ).fetchall()