Export improvements (#22867)

* backend

* frontend + i18n

* tests + api spec

* tweak backend to use Job infrastructure for exports

* frontend tweaks and Job infrastructure

* tests

* tweaks

- add ability to remove from case
- change location of counts in case card

* add stale export reaper on startup

* fix toaster close button color

* improve add dialog

* formatting

* hide max_concurrent from camera config export settings

* remove border

* refactor batch endpoint for multiple review items

* frontend

* tests and fastapi spec

* fix deletion of in-progress exports in a case

* tweaks

- hide cases when filtering cameras that have no exports from those cameras
- remove description from case card
- use textarea instead of input for case description in add new case dialog

* add auth exceptions for exports

* add e2e test for deleting cases with exports

* refactor delete and case endpoints

allow bulk deleting and reassigning

* frontend

- bulk selection like Review
- gate admin-only actions
- consolidate dialogs
- spacing/padding tweaks

* i18n and tests

* update openapi spec

* tweaks

- add None to case selection list
- allow new case creation from single cam export dialog

* fix codeql

* fix i18n

* remove unused

* fix frontend tests

web/public/locales/en/components/dialog.json

@@ -50,24 +50,79 @@
       "placeholder": "Name the Export"
     },
     "case": {
+      "newCaseOption": "Create new case",
+      "newCaseNamePlaceholder": "New case name",
+      "newCaseDescriptionPlaceholder": "Case description",
       "label": "Case",
+      "nonAdminHelp": "A new case will be created for these exports.",
       "placeholder": "Select a case"
     },
     "select": "Select",
     "export": "Export",
+    "queueing": "Queueing Export...",
     "selectOrExport": "Select or Export",
+    "tabs": {
+      "export": "Single Camera",
+      "multiCamera": "Multi-Camera"
+    },
+    "multiCamera": {
+      "timeRange": "Time range",
+      "selectFromTimeline": "Select from Timeline",
+      "cameraSelection": "Cameras",
+      "cameraSelectionHelp": "Cameras with tracked objects in this time range are pre-selected",
+      "checkingActivity": "Checking camera activity...",
+      "noCameras": "No cameras available",
+      "detectionCount_one": "1 tracked object",
+      "detectionCount_other": "{{count}} tracked objects",
+      "nameLabel": "Export name",
+      "namePlaceholder": "Optional base name for these exports",
+      "queueingButton": "Queueing Exports...",
+      "exportButton_one": "Export 1 Camera",
+      "exportButton_other": "Export {{count}} Cameras"
+    },
+    "multi": {
+      "title": "Export {{count}} reviews",
+      "title_one": "Export 1 review",
+      "title_other": "Export {{count}} reviews",
+      "description": "Export each selected review. All exports will be grouped under a single case.",
+      "descriptionNoCase": "Export each selected review.",
+      "caseNamePlaceholder": "Review export - {{date}}",
+      "exportButton": "Export {{count}} reviews",
+      "exportButton_one": "Export 1 review",
+      "exportButton_other": "Export {{count}} reviews",
+      "exportingButton": "Exporting...",
+      "toast": {
+        "started_one": "Started 1 export. Opening the case now.",
+        "started_other": "Started {{count}} exports. Opening the case now.",
+        "startedNoCase_one": "Started 1 export.",
+        "startedNoCase_other": "Started {{count}} exports.",
+        "partial": "Started {{successful}} of {{total}} exports. Failed: {{failedItems}}",
+        "failed": "Failed to start {{total}} exports. Failed: {{failedItems}}"
+      }
+    },
     "toast": {
       "success": "Successfully started export. View the file in the exports page.",
+      "queued": "Export queued. View progress in the exports page.",
       "view": "View",
+      "batchSuccess_one": "Started 1 export. Opening the case now.",
+      "batchSuccess_other": "Started {{count}} exports. Opening the case now.",
+      "batchPartial": "Started {{successful}} of {{total}} exports. Failed cameras: {{failedCameras}}",
+      "batchFailed": "Failed to start {{total}} exports. Failed cameras: {{failedCameras}}",
+      "batchQueuedSuccess_one": "Queued 1 export. Opening the case now.",
+      "batchQueuedSuccess_other": "Queued {{count}} exports. Opening the case now.",
+      "batchQueuedPartial": "Queued {{successful}} of {{total}} exports. Failed cameras: {{failedCameras}}",
+      "batchQueueFailed": "Failed to queue {{total}} exports. Failed cameras: {{failedCameras}}",
       "error": {
-        "failed": "Failed to start export: {{error}}",
+        "failed": "Failed to queue export: {{error}}",
         "endTimeMustAfterStartTime": "End time must be after start time",
         "noVaildTimeSelected": "No valid time range selected"
       }
     },
     "fromTimeline": {
       "saveExport": "Save Export",
-      "previewExport": "Preview Export"
+      "queueingExport": "Queueing Export...",
+      "previewExport": "Preview Export",
+      "useThisRange": "Use This Range"
     }
   },
   "streaming": {