Add agent instructions bundle editing

Expose first-class instructions bundle APIs, preserve agent prompt bundles in portability flows, and replace the Agent Detail prompts tab with file-backed bundle editing while retiring bootstrap prompt UI.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/lib/queryKeys.ts

@@ -18,6 +18,9 @@ export const queryKeys = {
     runtimeState: (id: string) => ["agents", "runtime-state", id] as const,
     taskSessions: (id: string) => ["agents", "task-sessions", id] as const,
     skills: (id: string) => ["agents", "skills", id] as const,
+    instructionsBundle: (id: string) => ["agents", "instructions-bundle", id] as const,
+    instructionsFile: (id: string, relativePath: string) =>
+      ["agents", "instructions-bundle", id, "file", relativePath] as const,
     keys: (agentId: string) => ["agents", "keys", agentId] as const,
     configRevisions: (agentId: string) => ["agents", "config-revisions", agentId] as const,
     adapterModels: (companyId: string, adapterType: string) =>