feat: add pause/resume to library context menu and batch operations

- Add pause/resume buttons to file context menu (right-click)
- Add batch pause/resume buttons to section titles
- Support concurrent pause/resume with pLimit(3)
- Add paused status badge (⏸) with warning color
- Integrate with Core API /api/v1/jobs/:uuid/pause|resume
- Track paused files via Redis jobs:paused set
- Add i18n translations (zh-TW, en)

src/locales/en.json

@@ -57,7 +57,8 @@
       "keyword_ready": "Keyword Ready",
       "semantic_ready": "Semantic Ready",
       "face_mgmt_ready": "Face Mgmt Ready",
-      "agent_ready": "Agent Ready"
+      "agent_ready": "Agent Ready",
+      "paused": "Paused"
     },
     "thumbnail": {
       "register_to_preview": "Register to see preview"
@@ -75,7 +76,9 @@
       "select_processor": "Please select at least one processor",
       "file_must_be_completed": "File must be completed first",
       "face_deduplication": "Face Deduplication",
-      "qc_check": "QC Check"
+      "qc_check": "QC Check",
+      "pause": "⏸ Pause",
+      "resume": "▶ Resume"
     },
     "pipeline": {
       "processors": "Processors",