Add 51job automation and unify resume delivery

[wardforce]

Summary

• Add 51job job collection, filtering, submission, QR export, and slider verification.
• Reuse verified detail tabs and add acceptance/test coverage for the 51job flow.
• Unify BOSS and Liepin resume delivery with per-profile attachments and delivery evidence.
• Harden Liepin chat composer detection and delivery flows.

Verification

• Not run in this PR preparation.

Generated .exe and local .omc session data are excluded.