feat(tags): show a character's fandom on its chip (truncated)

A character chip with a fandom only rendered a bare arrow. Surface the fandom
NAME inline, truncated to 15 chars (full name in the tooltip). Resolve the name
via a Tag self-join in both tag paths the modal uses — list_for_image
(/api/images/<id>/tags) and gallery get_image_with_tags
(/api/gallery/image/<id>) — so chips show the fandom on first open and after any
reload. Falls back to the bare arrow when only fandom_id is known. Operator-asked
2026-06-09.

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

backend/app/api/tags.py

@@ -172,6 +172,7 @@ async def list_tags_for_image(image_id: int):
                 "name": t.name,
                 "kind": t.kind.value,
                 "fandom_id": t.fandom_id,
+                "fandom_name": t.fandom_name,
             }
             for t in tags
         ]

backend/app/services/gallery_service.py

@@ -558,13 +558,26 @@ class GalleryService:
         record = await self.session.get(ImageRecord, image_id)
         if record is None:
             return None
+        # Self-join Tag to resolve a character's fandom NAME (not just id) so the
+        # modal chip can label it without an N+1 — mirrors list_for_image.
+        fandom_alias = Tag.__table__.alias("fandom_lookup")
         tag_stmt = (
-            select(Tag)
-            .join(image_tag, image_tag.c.tag_id == Tag.id)
+            select(
+                Tag.id,
+                Tag.name,
+                Tag.kind,
+                Tag.fandom_id,
+                fandom_alias.c.name.label("fandom_name"),
+            )
+            .select_from(
+                Tag.__table__
+                .join(image_tag, image_tag.c.tag_id == Tag.id)
+                .outerjoin(fandom_alias, Tag.fandom_id == fandom_alias.c.id)
+            )
             .where(image_tag.c.image_record_id == image_id)
             .order_by(Tag.kind.asc(), Tag.name.asc())
         )
-        tags = (await self.session.execute(tag_stmt)).scalars().all()
+        tags = (await self.session.execute(tag_stmt)).all()
         # Fetch the canonical post.post_date for this image (if any) so
         # the modal can show "Posted on <date>" alongside import date.
         posted_at = None
@@ -608,6 +621,7 @@ class GalleryService:
                     "name": t.name,
                     "kind": t.kind.value if hasattr(t.kind, "value") else t.kind,
                     "fandom_id": t.fandom_id,
+                    "fandom_name": t.fandom_name,
                 }
                 for t in tags
             ],

backend/app/services/tag_service.py

@@ -225,14 +225,29 @@ class TagService:
             )
         )
 
-    async def list_for_image(self, image_id: int) -> Sequence[Tag]:
+    async def list_for_image(self, image_id: int) -> Sequence:
+        """Tags on an image, ordered (kind, name). Each row carries the fandom's
+        NAME (not just fandom_id) via a self-join on Tag, so the UI can label a
+        character chip with its fandom without an N+1 (mirrors the
+        autocomplete/directory resolution)."""
+        fandom_alias = Tag.__table__.alias("fandom_lookup")
         stmt = (
-            select(Tag)
-            .join(image_tag, image_tag.c.tag_id == Tag.id)
+            select(
+                Tag.id,
+                Tag.name,
+                Tag.kind,
+                Tag.fandom_id,
+                fandom_alias.c.name.label("fandom_name"),
+            )
+            .select_from(
+                Tag.__table__
+                .join(image_tag, image_tag.c.tag_id == Tag.id)
+                .outerjoin(fandom_alias, Tag.fandom_id == fandom_alias.c.id)
+            )
             .where(image_tag.c.image_record_id == image_id)
             .order_by(Tag.kind.asc(), Tag.name.asc())
         )
-        return (await self.session.execute(stmt)).scalars().all()
+        return (await self.session.execute(stmt)).all()
 
     async def _keep_as_alias(self, tag_id: int) -> bool:
         """A merged-away tag's old name must survive as an alias iff the ML

frontend/src/components/modal/TagChip.vue

@@ -11,7 +11,10 @@
       @click:close="$emit('remove', tag.id)"
     >
       <v-icon start size="x-small">{{ iconFor(tag.kind) }}</v-icon>
-      {{ tag.name }}<span v-if="tag.fandom_id">→</span>
+      {{ tag.name }}<span
+        v-if="tag.fandom_id" class="fc-tag-chip__fandom"
+        :title="tag.fandom_name ? `Fandom: ${tag.fandom_name}` : 'Has a fandom'"
+      >→<template v-if="fandomLabel">&nbsp;{{ fandomLabel }}</template></span>
     </v-chip>
     <span class="fc-tag-chip__menu-wrap">
       <v-btn
@@ -40,15 +43,24 @@
 </template>
 
 <script setup>
-import { ref } from 'vue'
+import { computed, ref } from 'vue'
 import { useTagStore } from '../../stores/tags.js'
 
-defineProps({ tag: { type: Object, required: true } })
+const props = defineProps({ tag: { type: Object, required: true } })
 defineEmits(['remove', 'rename', 'set-fandom'])
 
 const store = useTagStore()
 const menuOpen = ref(false)
 
+// Show a character's fandom inline (truncated). Falls back to a bare arrow when
+// only fandom_id is known but the name wasn't resolved (older payloads).
+const FANDOM_MAX = 15
+const fandomLabel = computed(() => {
+  const n = props.tag.fandom_name
+  if (!n) return ''
+  return n.length > FANDOM_MAX ? `${n.slice(0, FANDOM_MAX)}…` : n
+})
+
 const KIND_ICONS = {
   general: 'mdi-tag', character: 'mdi-account-circle',
   fandom: 'mdi-book-open-page-variant', series: 'mdi-bookshelf',
@@ -62,4 +74,5 @@ function iconFor (k) { return KIND_ICONS[k] || 'mdi-tag' }
 .fc-tag-chip__menu-wrap { display: inline-flex; align-items: center; }
 .fc-tag-chip__kebab { opacity: 0.7; }
 .fc-tag-chip:hover .fc-tag-chip__kebab { opacity: 1; }
+.fc-tag-chip__fandom { opacity: 0.7; font-size: 0.85em; }
 </style>