fix(modal/tags): fandom list, modal kebab, ESC-after-accept — #712 #711 #700

#712 — fandom picker showed no existing fandoms: loadFandoms enumerated via
/tags/autocomplete with q=' ', which the backend strips to empty → returns [].
Switch to the cursor-paged /tags/directory?kind=fandom (loop all pages); drop the
load-once guard so the dialog reflects fandoms created elsewhere.

#711 — modal tag-chip kebab never opened: the kebab + menu were nested INSIDE the
v-chip, which swallowed the click / mis-anchored the teleported menu. Un-nest it
as a sibling v-btn using the standard v-menu activator slot (Vuetify wires the
click and stacks the overlay above the modal natively). Removes the openTagId
workaround.

#700 — ESC didn't close the modal after accepting a suggested tag: the guard
suppressed close while ANY .v-overlay--active existed, which includes tooltips —
a lingering tooltip blocked the close. Exclude .v-tooltip from the guard so only
real interactive overlays (menus/dialogs) keep ESC from closing.

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

frontend/src/components/modal/ImageViewer.vue

@@ -106,7 +106,11 @@ function onKeyDown(ev) {
     // overlay's own Esc handling fire instead of closing the whole
     // modal mid-interaction. Vuetify marks open overlays with
     // `.v-overlay--active`.
-    if (document.querySelector('.v-overlay--active')) return
+    // EXCLUDE tooltips (`.v-tooltip`): they're also `.v-overlay--active` while
+    // shown, so one lingering after a hover/click (e.g. just after accepting a
+    // suggested tag) wrongly suppressed the close (#700). Only real interactive
+    // overlays (menus/dialogs) should keep ESC from closing the modal.
+    if (document.querySelector('.v-overlay--active:not(.v-tooltip)')) return
     ev.preventDefault()
     emit('close')
   } else if (ev.key === 'ArrowLeft') {