[codex] Generate inline batch row overrides

[WalksWithASwagger]

Summary

• Add per-row inline batch controls for model, style, aspect ratio, and quality using /api/generate-options.
• Serialize only non-empty row override fields while keeping the backend inline prompt object shape unchanged.
• Show row override summaries and raw last-payload JSON for operator inspection.
• Extend backend and portal E2E coverage for mixed row overrides and omitted blank values.

Closes #293

Verification

• npm run frontend:verify (passed; existing fast-refresh warnings in shared UI files)
• python3 -m pytest tests/test_server_generate.py tests/test_server_endpoints.py -q
• npm run e2e:portal
• git diff --check

[github-actions]

Agentic PR Review

Verdict: needs-human

Checks:

• Linked issue via Closes #... or Refs #...: yes
• Issue acceptance criteria found: 12
• PR verification section present: yes
• PR acceptance self-check present: no
• Diff within v1 limits: yes

This PR is not blocked from human review, but the agentic gate is not satisfied.

[github-actions]

Agentic PR Review

Verdict: needs-human

Checks:

• Linked issue via Closes #... or Refs #...: yes
• Issue acceptance criteria found: 12
• PR verification section present: yes
• PR acceptance self-check present: no
• Diff within v1 limits: yes

This PR is not blocked from human review, but the agentic gate is not satisfied.

[github-actions]

Agentic PR Review

Verdict: needs-human

Checks:

• Linked issue via Closes #... or Refs #...: yes
• Issue acceptance criteria found: 12
• PR verification section present: yes
• PR acceptance self-check present: no
• Diff within v1 limits: yes

This PR is not blocked from human review, but the agentic gate is not satisfied.