qa(agent): disposition Gate 6 main deviations and browser-only scenarios

Gate 6 on FE `main@f954e479a37b168a9596aa05a1ce1dec1e9a93b4` found 27 conforming scenarios, three deviations, and five scenarios that still require browser evidence. This issue is the live consumer for the `qax-5` scorecard and tracks disposition of the eight non-conforming/unverified rows. The scorecard headline says 4/4, but its scenario table is authoritative and enumerates 3/5; this tracker records the corrected count.

Full context for agent readers

Focused Vitest evidence passed 18 files and 354 tests. The deviations are: T-01/PM-647, Ask/Auto preference persists but backend enforcement remains pending; T-05/PM-665, no production auto-fit call runs on turn completion and product intent may have changed; and T-29/PM-650, Ask Comfy Agent still uses `icon-[comfy--comfy-c]`, while the megaphone belongs only to feedback.

The browser-only rows are T-04/PM-660 generated-node overlap/readability, T-17/PM-658 tab visual fidelity, T-19/PM-668 unsaved-label placement/save transition, T-26/PM-670 design spacing, and X-01/PM-672 min/max panel-width usability and graph framing. Existing program rows `qax-2`, `qax-3`, and `tl-3` own browser execution, while this issue keeps the product dispositions and resulting evidence externally visible. T-04 and T-29 also have prior PM-630 live evidence under the program QA register.

Source artifact: `reports/scorecards/linear-conformance.md` in `christian-byrne/in-app-agent-program`, run `qax-5` on 2026-08-31.

Start with reports/scorecards/linear-conformance.md and the qax-5 scenario table for the authoritative 3/5 count. Review the eight T-01, T-05, T-29, T-04, T-17, T-19, T-26, and X-01 rows and the referenced qax-2, qax-3, and tl-3 ownership; done means product dispositions and resulting evidence are externally visible.

Written by the indexing model from the issue text.