feat(accounts): Break out API jobs in dashboard breakdown

[srtab]

Summary

• Add a dedicated API segment (emerald) to the dashboard outcome breakdown bar so TriggerType.API_JOB runs are no longer hidden in the "Other" catchall.
• Segment links to the activity list filtered by ?trigger=api_job, matching the existing trigger-keyed segments.
• "Other" now only catches UI runs and any future trigger types without a dedicated segment; comment updated accordingly.

Test plan

• uv run pytest tests/unit_tests/accounts/ — 163 passed
• uv run ruff check daiv/accounts/views.py — clean
• Manual: load /dashboard, confirm new emerald API chip appears when API jobs exist and clicks through to ?trigger=api_job