Jobs: list / create / edit + attach to changelist

- Tools -> Jobs: browse/filter jobs, create/edit job spec
- Pending changelist menu -> Attach job... (p4 fix)
- Backend p4 jobs, fix, job -o/-i

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/p4.ts

@@ -71,6 +71,10 @@ export const p4 = {
   streams: () => invoke<{ Stream?: string; Name?: string; Type?: string; Parent?: string; [k: string]: unknown }[]>("p4_streams"),
   switchStream: (stream: string) => invoke<P4Info>("p4_switch_stream", { stream }),
   streamInteg: (stream: string, direction: "down" | "up") => invoke<string>("p4_stream_integ", { stream, direction }),
+  jobs: () => invoke<{ Job?: string; Status?: string; Description?: string; User?: string; [k: string]: unknown }[]>("p4_jobs"),
+  fix: (job: string, change: string) => invoke<string>("p4_fix", { job, change }),
+  jobSpec: (job: string) => invoke<string>("p4_job_spec", { job }),
+  jobSave: (spec: string) => invoke<string>("p4_job_save", { spec }),
   diff: (file: string) => invoke<string>("p4_diff", { file }),
   revert: (files: string[]) => invoke<string>("p4_revert", { files }),
   submit: (description: string, files: string[]) =>