fix(modal): place meta + save block under Provenance, above Tags

Operator-clarified 2026-06-26: the dimensions/size/type + save (floppy) block
should sit DIRECTLY above the Tags section — i.e. just under Provenance — not at
the very top of the rail. Reorder the rail's main scroll area to Provenance →
ImageMetaBar → TagPanel (Related stays pinned at the bottom).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/components/modal/ImageViewer.vue

@@ -73,10 +73,13 @@
         </div>
 
         <aside v-if="modal.current" class="fc-viewer__side">
-          <!-- Meta + provenance + tags + suggestions scroll together here… -->
+          <!-- Provenance, then the meta + save block just beneath it, then tags
+               + suggestions — all scroll together here (operator-asked
+               2026-06-26: meta/download sits directly above Tags, under
+               Provenance). -->
           <div class="fc-viewer__side-main">
-            <ImageMetaBar />
             <ProvenancePanel />
+            <ImageMetaBar />
             <TagPanel />
           </div>
           <!-- …while Related is PINNED to the bottom of the rail so it stays