refactor: retire the images tarball backup

Images and attachments are backed up off-site, one object per file, so the
tar+zstd of /images goes: its service and restore, both tasks, the trigger and
restore routes, the Keep last setting, the screen's Images section, and the
tests. Migration 0122 drops backup_run.tar_path and
import_settings.backup_images_keep_last_n and deletes any images runs.

The local database dump stays for an install with no off-site destination,
and the Backups card now says plainly that images and attachments are backed
up only off-site.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/components/modal/DestructiveConfirmModal.vue

@@ -58,7 +58,7 @@ import { computed, ref, watch } from 'vue'
 const props = defineProps({
   modelValue: { type: Boolean, required: true },
   action: { type: String, required: true },          // 'restore' | 'delete'
-  kind: { type: String, required: true },            // 'db' | 'images' | 'artist' | 'tag' | 'images-selection' | 'audit' | 'min-dim'
+  kind: { type: String, required: true },            // 'db' | 'offsite' | 'artist' | 'tag' | 'images-selection' | 'audit' | 'min-dim'
   runId: { type: [Number, String], default: '' },    // numeric id or sha8 string
   description: { type: String, default: '' },
   tier: { type: String, default: 'C' },              // 'B' | 'C'

frontend/src/components/settings/BackupCard.vue

@@ -2,7 +2,7 @@
   <MaintenanceTile
     icon="mdi-database-export"
     title="Backups"
-    blurb="Database + image backups, schedules and restore."
+    blurb="Database and library backups, schedules and restore."
   >
       <p v-if="offsite" class="fc-muted text-body-2 mb-4">
         Database dumps stream to the <strong>{{ offsite.bucket }}</strong> bucket
@@ -11,11 +11,10 @@
         bucket's <code>media/</code> folder, below.
       </p>
       <p v-else class="fc-muted text-body-2 mb-4">
-        pg_dump for the database (fast, nightly-schedulable);
-        tar+zstd for the images (slow, manual only). Files live in
-        <code>/images/_backups/</code>. Tag a backup to protect it
-        from autoprune. Set up an off-site destination above to send
-        database dumps off this server instead.
+        Database dumps are written to <code>/images/_backups/</code> on this
+        server; tag one to keep it past Keep last. Images and attachments are
+        backed up only to an off-site destination: set one up above to back up
+        the whole library, database included, off this server.
       </p>
 
       <v-alert
@@ -171,34 +170,6 @@
         />
       </template>
 
-      <template v-else>
-      <!-- Images section -->
-      <h3 class="fc-section-title">Images</h3>
-      <div class="fc-settings-row mb-3">
-        <v-text-field
-          :model-value="settings.backup_images_keep_last_n"
-          label="Keep last" type="number" min="1" max="100"
-          density="compact" hide-details style="max-width: 110px;"
-          @update:model-value="onSettingChange('backup_images_keep_last_n', Number($event))"
-        />
-      </div>
-      <v-btn
-        color="accent" variant="flat" rounded="pill"
-        prepend-icon="mdi-folder-zip" class="mb-3"
-        :loading="imagesTriggering"
-        @click="onTrigger('images')"
-      >Run images backup now</v-btn>
-      <span class="text-caption fc-muted ml-2">
-        ⓘ Hours for a 200GB+ library.
-      </span>
-
-      <BackupRunsTable
-        :runs="store.imagesRuns"
-        @restore="onRestore"
-        @delete="onDelete"
-        @tag="onTag"
-      />
-      </template>
     <BackupConfirmModal
       v-model="confirmOpen"
       :action="confirmAction"
@@ -248,7 +219,6 @@ const settings = computed(() => store.settings || {
   backup_db_nightly_enabled: false,
   backup_db_nightly_hour_utc: 3,
   backup_db_keep_last_n: 14,
-  backup_images_keep_last_n: 3,
 })
 
 // The off-site destination, once it is fully set up: database dumps go there.
@@ -267,7 +237,6 @@ const runningSent = computed(() => runningMedia.value?.manifest?.sent || 0)
 
 const mediaTriggering = ref(false)
 const dbTriggering = ref(false)
-const imagesTriggering = ref(false)
 const confirmOpen = ref(false)
 const confirmAction = ref('restore')
 const confirmKind = ref('db')
@@ -356,8 +325,6 @@ function pollOnce() {
       store.loadMediaCoverage()
       store.loadRuns('reconcile')
     }
-  } else {
-    store.loadRuns('images')
   }
 }
 
@@ -373,7 +340,7 @@ onUnmounted(() => {
 })
 
 async function onTrigger(kind) {
-  const triggeringRef = { db: dbTriggering, images: imagesTriggering, media: mediaTriggering }[kind]
+  const triggeringRef = { db: dbTriggering, media: mediaTriggering }[kind]
   triggeringRef.value = true
   try {
     await store.triggerBackup(kind)
@@ -395,7 +362,7 @@ function _openConfirm(action, run) {
   confirmToken.value = ''
   confirmDescription.value = (
     action === 'restore'
-      ? `Source artifact: ${run.kind === 'db' ? run.sql_path : run.tar_path}`
+      ? `Source artifact: ${run.sql_path}`
       : 'Removes the BackupRun row and unlinks the artifact files.'
   )
   confirmOpen.value = true

frontend/src/stores/backup.js

@@ -7,7 +7,6 @@ export const useBackupStore = defineStore('backup', () => {
   const api = useApi()
 
   const dbRuns = ref([])
-  const imagesRuns = ref([])
   const mediaRuns = ref([])
   const restoreRuns = ref([])
   // The weekly check of the bucket against what was sent.
@@ -16,12 +15,12 @@ export const useBackupStore = defineStore('backup', () => {
   const testRuns = ref([])
   const settings = ref(null)
   const loading = ref({
-    dbRuns: false, imagesRuns: false, mediaRuns: false, restoreRuns: false,
+    dbRuns: false, mediaRuns: false, restoreRuns: false,
     reconcileRuns: false, testRuns: false, settings: false,
   })
   const lastError = ref(null)
   const RUNS = {
-    db: dbRuns, images: imagesRuns, media: mediaRuns, restore: restoreRuns,
+    db: dbRuns, media: mediaRuns, restore: restoreRuns,
     reconcile: reconcileRuns, test: testRuns,
   }
 
@@ -200,7 +199,7 @@ export const useBackupStore = defineStore('backup', () => {
   }
 
   return {
-    dbRuns, imagesRuns, mediaRuns, restoreRuns, reconcileRuns, testRuns,
+    dbRuns, mediaRuns, restoreRuns, reconcileRuns, testRuns,
     mediaCoverage, loadMediaCoverage,
     listOffsiteDumps, databaseBytes, restoreFromOffsite, fetchMissingFiles, testDump,
     settings, loading, lastError,