refactor(editor): drop duplicate description from gloss card

The Inspector already shows the selected element's description as an
editable field, and it co-renders with the gloss card on selection.
Showing the same text read-only in the gloss card was redundant, so the
card returns to its single job: defining the element's kind.

src/components/GlossPanel.vue

@@ -14,9 +14,7 @@ import { useVueFlow } from "@vue-flow/core"
 import { computed } from "vue"
 import { type GlossEntry, INFO_LINK_GLOSS, NODE_GLOSSARY } from "@/model/glossary"
 import type { EdgeData, NodeData } from "@/model/projection"
-import { useModelStore } from "@/store/model"
 
-const store = useModelStore()
 const { getSelectedNodes, getSelectedEdges } = useVueFlow("meadows")
 
 const gloss = computed<GlossEntry | null>(() => {
@@ -34,33 +32,6 @@ const gloss = computed<GlossEntry | null>(() => {
   }
   return null
 })
-
-/**
- * The selected element's own "why it's here" note (G4) — distinct from the
- * generic `gloss` above, which defines the *kind*. Read live from the store so
- * it tracks edits, and resolves the same selection a pipe/info edge stands in for.
- */
-const description = computed<string | null>(() => {
-  const nodes = getSelectedNodes.value
-  const edges = getSelectedEdges.value
-
-  if (nodes.length === 1 && edges.length === 0) {
-    const node = store.model.nodes.find((n) => n.id === nodes[0].id)
-    return node && node.kind !== "cloud" ? (node.description ?? null) : null
-  }
-  if (edges.length === 1 && nodes.length === 0) {
-    const edge = edges[0]
-    const kind = (edge.data as EdgeData | undefined)?.kind
-    if (kind === "pipe") {
-      const flow = store.model.nodes.find((n) => n.id === edge.id.split("::")[0])
-      return flow && flow.kind !== "cloud" ? (flow.description ?? null) : null
-    }
-    if (kind === "info") {
-      return store.model.infoLinks.find((l) => l.id === edge.id)?.description ?? null
-    }
-  }
-  return null
-})
 </script>
 
 <template>
@@ -70,13 +41,5 @@ const description = computed<string | null>(() => {
   >
     <div class="text-sm font-semibold">{{ gloss.term }}</div>
     <p class="mt-0.5 text-xs leading-snug text-base-content/70">{{ gloss.short }}</p>
-    <!-- This element's own rationale, below a divider so it reads apart from the
-         generic definition above (the "tour" note for the loaded sample). -->
-    <p
-      v-if="description"
-      class="mt-2 border-t border-base-300 pt-2 text-xs leading-snug text-base-content/80"
-    >
-      {{ description }}
-    </p>
   </div>
 </template>