Fix v0.7.5 WebKit layout release blockers

[francis-du]

Merged by a non-force fast-forward to the exact reviewed candidate 9799284. Concurrent main changes through 8efd8a5 were preserved.

Fixes:

• Long evidence identifiers, policy/model chips, and diagnostic text wrap within the inspector without hiding content.
• Browser assertions now cover inner inspector containers; a 375px before/after regression fails six new checks before the CSS fix and none after.
• Preserve upstream window-backed WebKit, font/frame readiness, viewport validation, bounded timeout, and partial failure reports. Add media/style diagnostics and failed-case counts.
• Consolidate independent native layout and 30-round checks in adversarial.yml, with exact checked-out revision and complete retained artifacts.
• Update English and Chinese v0.7.5 release notes.

Evidence:

• Window-backed main before the CSS fix (8efd8a5, run 35140608790): 96 cases, 32 grid containment failures, no header-overflow errors.
• Fixed ef99051: native 96/96 and isolated 12/12 widths pass; 30/30 adversarial rounds pass with stable input digest; Linux/macOS/Windows tests and quality gates pass.
• Final 9799284: PR Build & Release 35141517445 and Adversarial release audit 35141517469 pass. Downloaded report verifies 30/30, stable inputs, 96/96 native cases and 12/12 isolated widths against that exact SHA.

After fast-forward to main, the same SHA is undergoing ordinary push CI (Build & Release 35142199029; adversarial 35142199020). Documentation deployment 35142199060 passed. No v0.7.5 tag or release was created by this PR; only tag the verified exact SHA after the final push gates succeed. Existing release build/smoke-test workflow and Host/Origin/authorization checks are unchanged.

[francis-du]

Merged the concurrent main changes through 8efd8a5 into repair candidate ef99051, preserving the window-backed runner, fonts/two-frame readiness, partial failure reports, and existing authorization/release gates. The duplicate workflow introduced on this branch is consolidated into adversarial.yml; the final diff is only data.css, the browser assertions/diagnostics, and artifact/revision handling in that workflow.

The actual production fix is scoped evidence text wrapping: unbounded policy/model chips and diagnostic preformatted lines overflowed their inspector. The added 375px regression fails six overflow checks before the CSS fix and none after. The merged check script also passes all 96 production-page combinations in Chromium locally. Native WebKit and all 30 rounds are required independently; currently running on ef99051 in Adversarial release audit 35140878780 and Build & Release 35140878807. No tag or release has been created from this PR.