fix(tasks): restore INDEX_OPTIMIZE enum and remove no-op run button

INDEX_OPTIMIZE was dropped from the TaskType enum but still referenced
in _RUNNABLE_TASKS (views.py) and the frontend system-status-dialog,
causing an AttributeError at import time. Restore the enum value in the
model and migration so the serializer accepts it, but remove it from
_RUNNABLE_TASKS since index_optimize is a Tantivy no-op. Remove the
frontend "Run Task" button for index optimization accordingly.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src-ui/src/app/components/common/system-status-dialog/system-status-dialog.component.html

@@ -168,16 +168,6 @@
                     <i-bs name="exclamation-triangle-fill" class="text-danger ms-2 lh-1"></i-bs>
                   }
                 </button>
-                @if (currentUserIsSuperUser) {
-                  @if (isRunning(PaperlessTaskType.IndexOptimize)) {
-                    <div class="spinner-border spinner-border-sm ms-2" role="status"></div>
-                  } @else {
-                    <button class="btn btn-sm d-flex align-items-center btn-dark small ms-2" (click)="runTask(PaperlessTaskType.IndexOptimize)">
-                      <i-bs name="play-fill" class="me-1"></i-bs>
-                      <ng-container i18n>Run Task</ng-container>
-                    </button>
-                  }
-                }
               </dd>
               <ng-template #indexStatus>
                 @if (status.tasks.index_status === 'OK') {

src-ui/src/app/components/common/system-status-dialog/system-status-dialog.component.spec.ts

@@ -138,9 +138,9 @@ describe('SystemStatusDialogComponent', () => {
   })
 
   it('should check if task is running', () => {
-    component.runTask(PaperlessTaskType.IndexOptimize)
-    expect(component.isRunning(PaperlessTaskType.IndexOptimize)).toBeTruthy()
-    expect(component.isRunning(PaperlessTaskType.SanityCheck)).toBeFalsy()
+    component.runTask(PaperlessTaskType.SanityCheck)
+    expect(component.isRunning(PaperlessTaskType.SanityCheck)).toBeTruthy()
+    expect(component.isRunning(PaperlessTaskType.TrainClassifier)).toBeFalsy()
   })
 
   it('should support running tasks, refresh status and show toasts', () => {
@@ -151,22 +151,22 @@ describe('SystemStatusDialogComponent', () => {
 
     // fail first
     runSpy.mockReturnValue(throwError(() => new Error('error')))
-    component.runTask(PaperlessTaskType.IndexOptimize)
-    expect(runSpy).toHaveBeenCalledWith(PaperlessTaskType.IndexOptimize)
+    component.runTask(PaperlessTaskType.SanityCheck)
+    expect(runSpy).toHaveBeenCalledWith(PaperlessTaskType.SanityCheck)
     expect(toastErrorSpy).toHaveBeenCalledWith(
-      `Failed to start task ${PaperlessTaskType.IndexOptimize}, see the logs for more details`,
+      `Failed to start task ${PaperlessTaskType.SanityCheck}, see the logs for more details`,
       expect.any(Error)
     )
 
     // succeed
     runSpy.mockReturnValue(of({}))
     getStatusSpy.mockReturnValue(of(status))
-    component.runTask(PaperlessTaskType.IndexOptimize)
-    expect(runSpy).toHaveBeenCalledWith(PaperlessTaskType.IndexOptimize)
+    component.runTask(PaperlessTaskType.SanityCheck)
+    expect(runSpy).toHaveBeenCalledWith(PaperlessTaskType.SanityCheck)
 
     expect(getStatusSpy).toHaveBeenCalled()
     expect(toastSpy).toHaveBeenCalledWith(
-      `Task ${PaperlessTaskType.IndexOptimize} started`
+      `Task ${PaperlessTaskType.SanityCheck} started`
     )
   })
 

src/documents/migrations/0019_task_system_redesign.py

@@ -59,6 +59,7 @@ class Migration(migrations.Migration):
                             ("consume_file", "Consume File"),
                             ("train_classifier", "Train Classifier"),
                             ("sanity_check", "Sanity Check"),
+                            ("index_optimize", "Index Optimize"),
                             ("mail_fetch", "Mail Fetch"),
                             ("llm_index", "LLM Index"),
                             ("empty_trash", "Empty Trash"),

src/documents/models.py

@@ -682,6 +682,7 @@ class PaperlessTask(ModelWithOwner):
         CONSUME_FILE = "consume_file", _("Consume File")
         TRAIN_CLASSIFIER = "train_classifier", _("Train Classifier")
         SANITY_CHECK = "sanity_check", _("Sanity Check")
+        INDEX_OPTIMIZE = "index_optimize", _("Index Optimize")
         MAIL_FETCH = "mail_fetch", _("Mail Fetch")
         LLM_INDEX = "llm_index", _("LLM Index")
         EMPTY_TRASH = "empty_trash", _("Empty Trash")

src/documents/views.py

@@ -216,7 +216,6 @@ from documents.signals import document_updated
 from documents.tasks import build_share_link_bundle
 from documents.tasks import consume_file
 from documents.tasks import empty_trash
-from documents.tasks import index_optimize
 from documents.tasks import llmindex_index
 from documents.tasks import sanity_check
 from documents.tasks import train_classifier
@@ -3803,7 +3802,6 @@ class TasksViewSet(ReadOnlyModelViewSet[PaperlessTask]):
     }
 
     _RUNNABLE_TASKS = {
-        PaperlessTask.TaskType.INDEX_OPTIMIZE: (index_optimize, {}),
         PaperlessTask.TaskType.TRAIN_CLASSIFIER: (train_classifier, {}),
         PaperlessTask.TaskType.SANITY_CHECK: (sanity_check, {"raise_on_error": False}),
         PaperlessTask.TaskType.LLM_INDEX: (llmindex_index, {"rebuild": False}),