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>

config.ini

@@ -27,7 +27,7 @@ skip_existing = true
 [File]
 allowed_extensions = .jpg,.jpeg,.png,.bmp
 excel_extension = .xlsx
-max_file_size_mb = 4
+max_file_size_mb = 5
 
 [Templates]
 purchase_order = 银豹-采购单模板.xls