feat: split job history into a dedicated sidebar tab (#8957)

## Summary

Move queue job history into a dedicated sidebar tab (gated by `Comfy.Queue.QPOV2`) and remove mixed job-history UI from the Assets sidebar so assets and job controls are separated.

## Changes

- **What**:
  - Added `JobHistorySidebarTab` with reusable job UI primitives: `JobFilterTabs`, `JobFilterActions`, `JobAssetsList`, and shared `JobHistoryActionsMenu`.
  - Added reactive `job-history` tab registration in `sidebarTabStore`; prepends above Assets when `Comfy.Queue.QPOV2` is enabled and unregisters cleanly when disabled.
  - Added debounced search to `useJobList` (filters by job title, metadata, and prompt id).
  - Extracted clear-history dialog logic to `useQueueClearHistoryDialog` and reused it from queue overlay and job history tab.
  - Removed active-job rendering and queue-clear controls from assets list/grid/tab views; assets sidebar now focuses on media assets only.
  - Removed the QPOV2 gate from `MediaAssetViewModeToggle` and updated queue/job localized copy.
  - Added and updated tests for queue overlay header actions, job filters, search filtering, sidebar tab registration, and assets sidebar behavior.

## Review Focus

- Verify QPOV2 toggle behavior:
  - `Docked Job History` menu action toggles `Comfy.Queue.QPOV2`.
  - `job-history` tab insertion/removal order and active-tab reset on removal.
- Verify behavior split between tabs:
  - Job controls (cancel/delete/view/filter/search/clear history/clear queue) live in Job History.
  - Assets sidebar loading/empty states and list/grid rendering remain correct after removing active jobs.

## Screenshots (if applicable)
<img width="670" height="707" alt="image" src="https://github.com/user-attachments/assets/3a201fcb-d104-4e95-b5fe-49c4006a30a5" />

src/components/queue/JobHistoryActionsMenu.vue

@@ -0,0 +1,104 @@
+<template>
+  <div class="flex items-center gap-1">
+    <Popover :show-arrow="false">
+      <template #button>
+        <Button
+          v-tooltip.top="moreTooltipConfig"
+          variant="textonly"
+          size="icon"
+          :aria-label="t('sideToolbar.queueProgressOverlay.moreOptions')"
+        >
+          <i
+            class="icon-[lucide--more-horizontal] block size-4 leading-none text-text-secondary"
+          />
+        </Button>
+      </template>
+      <template #default="{ close }">
+        <div class="flex min-w-[14rem] flex-col items-stretch font-inter">
+          <Button
+            data-testid="docked-job-history-action"
+            class="w-full justify-between text-sm font-light"
+            variant="textonly"
+            size="sm"
+            @click="onToggleDockedJobHistory"
+          >
+            <span class="flex items-center gap-2">
+              <i
+                class="icon-[lucide--panel-left-close] size-4 text-text-secondary"
+              />
+              <span>{{
+                t('sideToolbar.queueProgressOverlay.dockedJobHistory')
+              }}</span>
+            </span>
+            <i
+              v-if="isQueuePanelV2Enabled"
+              class="icon-[lucide--check] size-4"
+            />
+          </Button>
+          <!-- TODO: Bug in assets sidebar panel derives assets from history, so despite this not deleting the assets, it still effectively shows to the user as deleted -->
+          <template v-if="showClearHistoryAction">
+            <div class="my-1 border-t border-interface-stroke" />
+            <Button
+              data-testid="clear-history-action"
+              class="h-auto min-h-0 w-full items-start justify-start whitespace-normal"
+              variant="textonly"
+              size="sm"
+              @click="onClearHistoryFromMenu(close)"
+            >
+              <i
+                class="icon-[lucide--trash-2] size-4 shrink-0 self-center text-destructive-background"
+              />
+              <span
+                class="flex flex-col items-start break-words text-left leading-tight"
+              >
+                <span class="text-sm font-light">
+                  {{ t('sideToolbar.queueProgressOverlay.clearHistory') }}
+                </span>
+                <span class="text-xs text-text-secondary font-light">
+                  {{
+                    t(
+                      'sideToolbar.queueProgressOverlay.clearHistoryMenuAssetsNote'
+                    )
+                  }}
+                </span>
+              </span>
+            </Button>
+          </template>
+        </div>
+      </template>
+    </Popover>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+
+import Popover from '@/components/ui/Popover.vue'
+import Button from '@/components/ui/button/Button.vue'
+import { buildTooltipConfig } from '@/composables/useTooltipConfig'
+import { isCloud } from '@/platform/distribution/types'
+import { useSettingStore } from '@/platform/settings/settingStore'
+
+const emit = defineEmits<{
+  (e: 'clearHistory'): void
+}>()
+
+const { t } = useI18n()
+const settingStore = useSettingStore()
+
+const moreTooltipConfig = computed(() => buildTooltipConfig(t('g.more')))
+const isQueuePanelV2Enabled = computed(() =>
+  settingStore.get('Comfy.Queue.QPOV2')
+)
+const showClearHistoryAction = computed(() => !isCloud)
+
+const onClearHistoryFromMenu = (close: () => void) => {
+  close()
+  emit('clearHistory')
+}
+
+const onToggleDockedJobHistory = async () => {
+  await settingStore.set('Comfy.Queue.QPOV2', !isQueuePanelV2Enabled.value)
+}
+</script>