[ZEPPELIN-6685] Resolve the app's imports in the shell unit test setup

[voidmatcha]

What is this PR for?

vitest.shell.config.mts declares no resolve.alias, and Vite does not read the paths block in tsconfig.base.json, so a spec cannot reach application source:

Failed to resolve import "@zeppelin/interfaces" from "src/app/services/array-ordering.service.ts"

The failure is in the source, not the spec: most of src/ imports @zeppelin/* itself, so a relative import does not avoid it.

monaco-editor does not resolve either. It publishes no main and no exports (monaco-editor#4848); module names editor.main, which boots the full editor and fails under jsdom. Eleven files import it, two behind the @zeppelin/services barrel.

This adds the alias block, a spec that exercises it, and a note in AGENTS.md. Two entries differ from tsconfig.base.json:

• @zeppelin/sdk and @zeppelin/visualization resolve to library source, not dist/, so a unit run does not wait on a build. projects/zeppelin-react/vitest.config.mts already does this for the SDK.
• monaco-editor resolves to esm/vs/editor/editor.api.js.

What type of PR is it?

Improvement

Todos

None

What is the Jira issue?

ZEPPELIN-6685

How should this be tested?

npm run test:shell goes from 29 tests to 37. The new spec covers ArrayOrderingService: trash folder last, blank title falls back to Note <id>, folders before notes, same-kind nodes by display name.

It imports through the @zeppelin/services barrel so the chain reaches monaco and @zeppelin/sdk. Pointing any of monaco-editor, @zeppelin/sdk or the catch-all at a nonexistent path fails it. Nothing imports the sdk/* or visualization/* subpaths today, so those two are uncovered.

ng build --configuration production and ng lint both pass unchanged: only Vitest reads the config, and src/tsconfig.json excludes specs from the build.

Screenshots (if appropriate)

N/A

Questions:

• Does the license files need to update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No