Keep the Python docs search overlay within the viewport

[rmcdaniel]

Problem

Opening search on https://python.durable-workflow.com/ expands the document far beyond the viewport. At 768 px the rendered document is 2240 px wide; at 390 px it is 1262 px wide. The visible overlay appears fitted, but the page remains horizontally pannable.

The regression landed with CSS that directly changes MkDocs search behavior, while the visual evidence covered consent states without exercising the search-open interaction. The evidence gate must recognize search/navigation selectors as requiring their meaningful interaction states.

Acceptance criteria

• Keep the closed and open MkDocs search states within the viewport at desktop, intermediate, and mobile widths.
• Preserve a usable search input, result list, close/back control, consent controls, and underlying navigation behavior.
• Add a focused browser regression assertion that opens search and verifies document width does not exceed viewport width at intermediate and mobile sizes.
• Update visual-evidence classification so customer-facing CSS or templates that affect search/navigation require captures of the affected open interaction state, not only the default page state.
• Do not pin documentation prose, headings, or Markdown layout.

Delete when

Both repository changes are landed, and rendered evidence shows the search-open state without horizontal overflow at intermediate and mobile widths.

Required source targets

durable-workflow/.github@main
durable-workflow/sdk-python@main

[rmcdaniel]

Cross-repository landing evidence (generated from trusted implementation pull requests or authenticated protected-branch completion records):

Target	Latest attempt	Bound provenance	Landing	Required qualification	State
durable-workflow/.github@main	Not linked	Pending	Pending	Pending: Control-plane source qualification; required: Control-plane source qualification	pending:no-linked-pull-request
durable-workflow/sdk-python@main	Not linked	Pending	Pending	Pending: Target branch qualification; required: Target branch qualification	pending:no-linked-pull-request

The parent remains open until every declared target is complete.

[rmcdaniel]

Completed in f4d3f32e161d on main.

No package release was required for this source-only change.

Required public qualification CI (ci.yml) passed in run 30732390344.

Required cross-repository target qualification passed:

• github-control-plane:main at 5d7f59989524 (qualification)