Fix inconsistent displayName field lookup in parseCodexSkillsResult

Read displayName from both the top-level skill object and the nested
interface sub-object, consistent with how shortDescription is handled.
Previously displayName was only read from skill.interface.displayName,
silently dropping any top-level skill.displayName value.

Author: cursoragent

apps/server/src/provider/codexAppServer.ts

@@ -64,8 +64,11 @@ function parseCodexSkillsResult(result: unknown, cwd: string): ReadonlyArray<Ser
           ? { description: nonEmptyTrimmed(skill?.description) }
           : {}),
         ...(nonEmptyTrimmed(skill?.scope) ? { scope: nonEmptyTrimmed(skill?.scope) } : {}),
-        ...(nonEmptyTrimmed(display?.displayName)
-          ? { displayName: nonEmptyTrimmed(display?.displayName) }
+        ...(nonEmptyTrimmed(skill?.displayName) || nonEmptyTrimmed(display?.displayName)
+          ? {
+              displayName:
+                nonEmptyTrimmed(skill?.displayName) ?? nonEmptyTrimmed(display?.displayName),
+            }
           : {}),
         ...(nonEmptyTrimmed(skill?.shortDescription) || nonEmptyTrimmed(display?.shortDescription)
           ? {