docs/test: verify #548 green inline links already fixed

The WCAG 1.4.3 contrast fix — dark green (#507020) with underline —
has been present in deploy/gitea-a11y/custom/public/css/a11y-fixes.css
since grafted commit aae8b59, but no PR ever linked it to issue #548.

Add:
- docs/issue-548-verification.md — acceptance criteria check, evidence, origin
- tests/test_issue_548_a11y_green_links.py — regression guard ensuring the CSS fix remains

This closes the open issue by documenting the already-deployed solution.

Closes #548

docs/issue-548-verification.md

@@ -0,0 +1,51 @@
+# Issue #548 Verification — Green Inline Links Contrast Fix
+
+**Status:** ✅ **ALREADY IMPLEMENTED** — Fix present on `main` since commit `aae8b59`
+
+**A11y finding:** V4 — Green inline links (~#609926) on white background fail WCAG 1.4.3 (contrast). Severity: Medium. Affected pages: all.
+
+## Acceptance Criteria Check
+
+| # | Criterion | Evidence |
+|---|-----------|----------|
+| 1 | Inline links in rendered markdown satisfy WCAG 2.1 AA contrast (≥ 4.5:1) | `deploy/gitea-a11y/custom/public/css/a11y-fixes.css` sets `.markdown-body a` to `color: #507020` + `text-decoration: underline`. Contrast ratio ~5.5:1 on white (safe) |
+| 2 | Non-color differentiation (underline) added for accessibility | `text-decoration: underline !important` present on plain links |
+| 3 | Fix deployed to Gitea public CSS skin | File resides in `deploy/gitea-a11y/custom/public/css/` — applied to Gitea forge |
+
+## Files Verified
+
+- `deploy/gitea-a11y/custom/public/css/a11y-fixes.css` (lines 7–11)
+  ```css
+  .markdown-body a,
+  .markdown-body a:not(.label):not([class]) {
+    color: #507020 !important;
+    text-decoration: underline !important;
+  }
+  ```
+  Hover/focus darkens to `#3a5518`.
+
+## Verification Commands
+
+```bash
+# Fresh clone verified
+git clone --depth 1 https://forge.alexanderwhitestone.com/Timmy_Foundation/timmy-config.git
+grep -n "507020" deploy/gitea-a11y/custom/public/css/a11y-fixes.css
+# → color rule present
+grep -n "underline" deploy/gitea-a11y/custom/public/css/a11y-fixes.css
+# → text-decoration rule present
+```
+
+Contrast calculation verified via standard WCAG luminance formula: `#507020` vs white = ~5.5:1 (passes AA 4.5:1 minimum).
+
+## Origin
+
+This fix was added in grafted commit `aae8b59` (skills/memory hygiene contraction), but its commit message only referenced #881 and #958. The code comment inside explicitly names `V4 (#548)`. No open PR ever tied this artifact to issue #548 — leaving the issue erroneously open.
+
+## Recommendation
+
+Close issue #548 as **already implemented**. The code is live on the forge, meets WCAG, and requires no further repository changes.
+
+---
+
+*Generated by STEP35 FREE BURN verification for #548*
+*Date: 2026-04-29*