Fix catalog identity resolution for installed plugin details

[bb-slop-cop]

Human comments

What was wrong

Installed plugin records carry both a catalog entry ID and marketplace name, but the app view model discarded the marketplace name and the detail route selected catalog metadata using only the plugin ID. When two marketplaces used the same ID, the first catalog result supplied another publisher's metadata. The verified investigation is at https://get-bb.github.io/reports/issues/3263.html.

What changed

The app now retains the installed marketplace identity and resolves catalog metadata only when plugin ID, entry ID, and marketplace all match. If the installed catalog entry is unavailable, the detail page uses installed-package metadata instead of an unrelated same-ID result. Uninstalled catalog browsing keeps its existing plugin-ID lookup.

How you verified

• Added focused route regressions for colliding marketplace entries and for a missing installed catalog entry. Both failed on unchanged origin/main in two clean trusted checkouts, then passed after the fix.
• pnpm exec turbo run test typecheck --filter=@bb/app (493 test files passed; 4,049 tests passed and 3 skipped)
• pnpm exec turbo run lint --filter=@bb/app (0 errors; 182 pre-existing warnings)
• git diff --check
• Changed-line count: 184 text lines (182 additions, 2 deletions) across 4 files; no binary changes.

Fixes #3263

AGENT GENERATED