fix(agent): show skill display name, not slug, for committed embeds

describeSkill now resolves the embed's sibling name or the referenced
workflow's name (via staticEmbedName), falling back to the slug, so committed
static/embedded skills render their human name instead of the raw __ag__* slug.

Claude-Session: https://claude.ai/code/session_01LUTGjUDzSX1tiJwqnqACtj

Author: mmabrouk

web/packages/agenta-entity-ui/src/DrillInView/SchemaControls/agentTemplate/itemDescriptors.tsx

@@ -201,6 +201,15 @@ export function staticEmbedSlug(skill: Record<string, unknown>): string | undefi
     return typeof slug === "string" ? slug : undefined
 }
 
+/** Display name for an embedded skill: the embed's sibling `name`, else the referenced workflow's
+ * `name`. Callers fall back to the slug when this is undefined. */
+export function staticEmbedName(skill: Record<string, unknown>): string | undefined {
+    if (typeof skill.name === "string" && skill.name) return skill.name
+    const refs = asObj(asObj(skill["@ag.embed"])?.["@ag.references"])
+    const wfName = asObj(refs?.workflow)?.name ?? asObj(refs?.workflow_revision)?.name
+    return typeof wfName === "string" && wfName ? wfName : undefined
+}
+
 /** A pinned revision's version, when the embed references a `workflow_revision`. */
 function embedRevisionVersion(skill: Record<string, unknown>): string | undefined {
     const refs = asObj(asObj(skill["@ag.embed"])?.["@ag.references"])
@@ -228,7 +237,7 @@ export function describeSkill(skill: unknown): ItemDescriptor {
         const slug = staticEmbedSlug(s)
         const version = embedRevisionVersion(s)
         return {
-            name: slug ?? "Static skill",
+            name: staticEmbedName(s) ?? slug ?? "Static skill",
             mono: "sk",
             color: "#6b7280",
             tags: version ? ["static", `v${version}`] : ["static"],
@@ -238,7 +247,7 @@ export function describeSkill(skill: unknown): ItemDescriptor {
     }
     if (isEmbedRefSkill(s)) {
         return {
-            name: "Skill reference",
+            name: staticEmbedName(s) ?? staticEmbedSlug(s) ?? "Skill reference",
             mono: "sk",
             color: "#b45309",
             tags: ["@ag.embed"],