Commit 4 BINDING design specs into docs/proposals/mockups/ for durability

[WilfordGrimley]

Description

A durability gap: four BINDING, owner-approved design specs (rail-delegacy, editor-polish, cardback-pdfwait, wtc-rebuild) lived only in a session's tmp dir — which does not survive past that session — while committed code comments across the repo already cite each spec by filename as its authority. Same failure mode docs/reference/funnel-spec.md was recovered from during the 2026-07-23 D-lettering sweep. This PR brings all four into the repo, following the docs/proposals/mockups/proposal-h/ precedent (spec + companion static-HTML mockup, one directory per round).

What shipped

• docs/proposals/mockups/{rail-delegacy,editor-polish,cardback-pdfwait,wtc-rebuild}/SPEC-*.md + each spec's companion mockup HTML (*-mockup.html), copied verbatim (including OWNER AMENDMENTS sections where present — editor-polish and cardback-pdfwait have one, rail-delegacy/wtc-rebuild don't).
• Screenshots/PNGs deliberately not copied (bulk verification artifacts — each spec + its self-contained mockup HTML stands alone); wtc-rebuild's header notes this explicitly since its own line 4 mentions "+ PNGs (this dir)".
• One-line provenance header added to each SPEC-*.md (the only content edit beyond mechanical formatting): origin date (2026-07-24), which committed files cite it by filename, and a pointer to funnel-spec.md as the precedent for this durability convention.
• docs/proposals/mockups/README.md (new) indexes all five bundles (proposal-h/ + the four new ones) and explains why the four are here.
• docs/README.md's Records section links the new index, so the bundle is reachable from the index chain (though proposals/mockups/ is already exempt from the orphan check as an archive-prefix bucket).

Mechanical fixes only, content otherwise verbatim

• Ran npx prettier@2.7.1 --write on each SPEC-*.md (repo convention / pre-commit hook scope). Verified per-file: idempotent on a second pass, and diffed against the tmp originals — the only changes are table-column realignment, wrapped-prose reflow, and safe *text*→_text_/bare-*→\* emphasis-marker normalization (the corruption failure mode in docs/lessons.md's prettier entry — intraword-underscore breakage — does not appear anywhere in these files; none use bare underscores in prose).
• No relative-link adjustments were needed — none of the four specs contain markdown links, and their mockup HTML files are self-contained (no relative asset references) or link only to /whatsthat/#.

Durability rationale / code-comment citation check

Per the task's ask, grepped committed code (frontend/src, MPCAutofill) for both the spec filenames and the literal tmp path:

• SPEC-rail-delegacy.md, SPEC-editor-polish.md, SPEC-cardback-pdfwait.md are now cited by ~40 committed files on master itself (landed via Cardback reminder gate + apply-all/set-default prompts + PDF-wait experience #431, which merged onto master during this PR's session — this branch is rebased past it) — e.g. DisplayPage.tsx, SelectVersionResults.tsx, PDFGenerator.tsx, AutofillCollapse.tsx, SourcesAccordion.tsx, RequestedPrintingBadge.tsx, PrePrintSaveGate.tsx, CommonCardback.tsx, plus their test/spec files.
• SPEC-wtc-rebuild.md is cited on the still-open PR Re-theme site to Tokyo-11 (Tokyo Night, orange action, purple accent, Semi radius) #438 (tokyo-11-retheme) branch — ChipCard.tsx, WhatsThatWords.tsx, cardPanel.tsx — not yet on master.
• No committed code anywhere cites the raw tmp path (/home/ubuntu/.claude/jobs/...) — every citation uses the bare SPEC-*.md filename, which is exactly why bringing the specs into the repo under their original filenames resolves the citations with no code changes needed. No follow-up path-fix items to flag.

Verification

• python3 .github/scripts/docs_lint.py --strict: clean (0 hard findings, 0 soft findings).
• python3 .github/scripts/tests/test_docs_lint.py: 26/26 pass (includes the real-repo full-corpus check).
• python3 .github/scripts/tests/test_publish_wiki_link_rewrite.py: 4/4 pass.
• python3 .github/scripts/tests/test_publish_readme.py + publish_readme.py regenerate-and-diff: pass, zero drift (this PR doesn't touch readme.md's source regions).
• npx prettier@2.7.1 --check on every changed/added markdown file: clean.
• Pre-commit hooks (prettier, end-of-file, trailing-whitespace) ran clean on commit.
• Deferred: no policy-text/wiki-published-page changes in this PR (docs/proposals/ is excluded from the wiki publish map), so the Policy-text and Wiki-maintenance checklist items don't apply.

Checklist

• I have installed pre-commit and installed the hooks with pre-commit install before creating any commits.
• I have updated any related tests for code I modified or added new tests where appropriate. (N/A — docs-only change; ran the existing docs-lint test suites above instead.)
• I have manually tested my changes as follows: ran docs_lint.py --strict, the docs-lint/link-rewrite/readme-parity test suites, and prettier --check on every changed file (see Verification).
• I have updated any relevant documentation or created new documentation where appropriate.