refactor: rename internal promptId/PromptId to jobId/JobId (#8730)

## Summary

Rename all internal TypeScript usage of legacy `promptId`/`PromptId`
naming to `jobId`/`JobId` across ~38 files for consistency with the
domain model.

## Changes

- **What**: Renamed internal variable names, type aliases, function
names, class getters, interface fields, and comments from
`promptId`/`PromptId` to `jobId`/`JobId`. Wire-protocol field names
(`prompt_id` in Zod schemas and `e.detail.prompt_id` accesses) are
intentionally preserved since they match the backend API contract.

## Review Focus

- All changes are pure renames with no behavioral changes
- Wire-protocol fields (`prompt_id`) are deliberately unchanged to
maintain backend compatibility
- Test fixtures updated to use consistent `job-id` naming

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8730-refactor-rename-internal-promptId-PromptId-to-jobId-JobId-3016d73d3650813ca40ce337f7c5271a)
by [Unito](https://www.unito.io)

src/renderer/extensions/linearMode/OutputHistory.vue

@@ -135,7 +135,7 @@ function allOutputs(item?: AssetItem): MaybeRef<ResultItemImpl[]> {
     return user_metadata.allOutputs
 
   const outputRef = useAsyncState(
-    getJobDetail(user_metadata.promptId).then((jobDetail) => {
+    getJobDetail(user_metadata.jobId).then((jobDetail) => {
       if (!jobDetail?.outputs) return []
       return Object.entries(jobDetail.outputs).flatMap(flattenNodeOutput)
     }),