feat(my-videos): wire bucket reconciliation into the tab (Phase 2, step 3b)

After the note-side list renders, the My Videos tab now reconciles against the
bucket: lists the user's objects (unlock-gated), then marks any active note whose
hosted file is gone as a 🟠 "Missing file", and lists bucket objects no current
video references in an "Orphaned storage objects" section — including files left
behind by videos deleted on Nostr (the headline cleanup case). Each orphan has a
"Delete file" button (with a confirm) that calls deleteStorageKeys and refreshes.

Reconciliation runs after the list is shown so the UI stays responsive, and is a
no-op (orphan section hidden) when storage is locked/unconfigured. Rows carry a
data-video-id + a data-role pill so missing status can be applied in place.

Build + full lint green (DOM via createElement/textContent, no innerHTML).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

components/profile-modal.html

@@ -993,6 +993,20 @@
                 class="grid-stack"
                 data-orientation="vertical"
               ></ul>
+              <div id="profileMyVideosOrphans" class="space-y-2 hidden">
+                <h4 class="text-sm font-semibold text-text">
+                  Orphaned storage objects
+                </h4>
+                <p class="text-2xs text-muted">
+                  Files in your bucket that no current video references — safe to
+                  remove to reclaim space.
+                </p>
+                <ul
+                  id="profileMyVideosOrphanList"
+                  class="grid-stack"
+                  data-orientation="vertical"
+                ></ul>
+              </div>
             </section>
 
             <section