[chbndrhnns]

What does this PR do?

Allows users to highlight words or phrases in the listing description on the listing detail page, right-click, and directly add them to the parent job's ignore list (blacklist).

• Backend API & Storage:
  • Added jobStorage.appendJobBlacklist(jobId, wordsToAppend) wrapped in a SQLite transaction with case-insensitive deduplication and whitespace trimming.
  • Added POST /api/jobs/:jobId/blacklist endpoint validating user ownership (doesJobBelongsToUser), job existence, demo mode constraints, and payload terms.
• Frontend:
  • Added jobsData.addJobBlacklistWord(jobId, word) to store action state.
  • Added context menu listener (onContextMenu) to ListingDescriptionCard that anchors a floating menu item to mouse click coordinates when text is selected.
  • Provides feedback toast notifying whether terms were added or were already present in the job's blacklist.
• Locales:
  • Added translation keys across all supported locales (en, de, es, fr, it, tr).
• Tests:
  • Added test/api/jobBlacklist.test.js testing permission enforcement, 404s, input validation, deduplication, and admin modification.
  • Added unit test cases to test/storage/jobStorage.test.js.

Related issue

Closes #496

AI disclosure (required)

Fredy accepts AI assisted contributions, but they have to be declared. An
undeclared AI PR will be closed. Tick exactly one box:

• ai:none - I wrote this myself. No AI generated code, text or commit messages.
• ai:assisted - AI helped with parts of it (autocomplete, refactoring, tests, docs). I reviewed and understand every line.
• ai:generated - AI produced most or all of this PR. I reviewed it, but it is largely machine written.

If you ticked ai:assisted or ai:generated, the three answers below are
mandatory. Keep them on the same line as the label.

Which AI: OMP, Gemini 3.8 Flash

How much: I gave my feature request to AI and let it generate the required changes.

Why: Prototype generation, feel free to adopt/reject

Checklist

• yarn test:offline passes (or yarn test if the change touches a live provider)
• yarn lint and yarn format:check pass
• The change is useful for everybody, not a custom tweak for my own setup
• I have read and answered the AI disclosure above honestly

[orangecoding]

Backend part looks fine. The context menu needs work before this can go in: see the inline comments (shared jobs, error handling, the hijacked native menu, and the filter only seeing the search snippet).

[orangecoding]

lgtm. thanks!