fix: give the report header a logo that survives being small

README.md

@@ -242,7 +242,7 @@ ran.
 
 Passing runs stay to one line, with the detail folded away:
 
-> <img src="https://raw.githubusercontent.com/commit-check/commit-check-action/main/assets/logo.png" width="20" align="top" alt=""> **Commit Check**
+> <img src="https://raw.githubusercontent.com/commit-check/commit-check-action/main/assets/logo.png" width="24" align="top" alt=""> **Commit Check**
 >
 > ✅ **All 3 checks passed**
 >
@@ -266,7 +266,7 @@ Passing runs stay to one line, with the detail folded away:
 Failures open with a count, then a table of only the scopes that failed — every
 rule ID links to its documentation — with the full tree still one click away:
 
-> <img src="https://raw.githubusercontent.com/commit-check/commit-check-action/main/assets/logo.png" width="20" align="top" alt=""> **Commit Check**
+> <img src="https://raw.githubusercontent.com/commit-check/commit-check-action/main/assets/logo.png" width="24" align="top" alt=""> **Commit Check**
 >
 > ❌ **2 of 4 checks failed**
 >

main.py

@@ -35,14 +35,21 @@
 # cross-repository dependency, and as PNG rather than SVG because GitHub proxies
 # comment images through camo, which handles SVG unreliably. Point this at a
 # single org-wide asset if the other tools grow the same header.
+#
+# This is the org's *filled* mark (branding/avatar.png), not the transparent
+# logo-mark. At this size a stroke has almost no visual weight -- the wordless
+# mark rendered as a faint tick, worst on dark backgrounds -- while a filled
+# tile holds up. It is the asset the branding README calls out as legible
+# small, and the width below matches the h2 cap height so the icon is not
+# smaller than the words next to it.
 LOGO_URL = (
     "https://raw.githubusercontent.com/commit-check/commit-check-action/main/"
     "assets/logo.png"
 )
 
 #: Report heading. h2 rather than h1: this renders inside a PR comment, where an
 #: h1 is louder than anything else on the page.
-REPORT_TITLE = f'## <img src="{LOGO_URL}" width="20" align="top" alt=""> Commit Check'
+REPORT_TITLE = f'## <img src="{LOGO_URL}" width="24" align="top" alt=""> Commit Check'
 
 #: Prefixes of report bodies written by earlier versions, kept so the first run
 #: after upgrading adopts the existing comment instead of posting a second one.
@@ -567,7 +574,7 @@ def _scope_value(scope: ScopeResult, max_len: int = 60) -> str:
 # Success:
 #
 #   <!-- commit-check-action -->
-#   ## <img src="..." width="20" align="top" alt=""> Commit Check
+#   ## <img src="..." width="24" align="top" alt=""> Commit Check
 #
 #   ✅ **All 5 checks passed**
 #
@@ -592,7 +599,7 @@ def _scope_value(scope: ScopeResult, max_len: int = 60) -> str:
 # Failure:
 #
 #   <!-- commit-check-action -->
-#   ## <img src="..." width="20" align="top" alt=""> Commit Check
+#   ## <img src="..." width="24" align="top" alt=""> Commit Check
 #
 #   ❌ **1 of 5 checks failed**
 #