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/stores/tags.js

@@ -34,10 +34,20 @@ export const useTagStore = defineStore('tags', () => {
   }
 
   async function loadFandoms() {
-    fandomCache.value = await api.get('/api/tags/autocomplete', {
-      params: { q: ' ', kind: 'fandom', limit: 200 }
-    })
-    return fandomCache.value
+    // List ALL fandoms via the cursor-paged tag directory. (#712: the old impl
+    // abused /tags/autocomplete with q=' ', which the backend strips to empty
+    // and returns [] — so the picker showed no existing fandoms.)
+    const all = []
+    let cursor = null
+    do {
+      const params = { kind: 'fandom', limit: 200 }
+      if (cursor) params.cursor = cursor
+      const body = await api.get('/api/tags/directory', { params })
+      all.push(...(body.cards || []))
+      cursor = body.next_cursor
+    } while (cursor)
+    fandomCache.value = all
+    return all
   }
 
   async function createFandom(name) {