feat(colophon): move the idea credits under the GitHub links

They sat between "Built by" and the two GitHub links, splitting one thought
about who made this and where it lives. Below the links they read as the
tail of that block instead of an interruption in it, and the paragraph that
invites a bug report still comes last, where a reader who has just found a
wrong date is looking.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

src/client/components/Colophon.tsx

@@ -282,26 +282,6 @@ export function Colophon({
         {"."}
       </p>
 
-      {IDEA_CREDITS.length > 0 && (
-        <p className="mt-2">
-          Additional ideas and design from{" "}
-          {IDEA_CREDITS.map((c, i) => (
-            <span key={c.handle}>
-              {i > 0 && (i === IDEA_CREDITS.length - 1 ? " and " : ", ")}
-              <a
-                href={c.url}
-                target="_blank"
-                rel="noreferrer noopener"
-                className={LINK}
-              >
-                {c.handle}
-              </a>
-            </span>
-          ))}
-          {"."}
-        </p>
-      )}
-
       <p className="mt-2 flex flex-wrap items-center gap-x-4 gap-y-1.5">
         <a
           href={AUTHOR.github}
@@ -323,6 +303,26 @@ export function Colophon({
         </a>
       </p>
 
+      {IDEA_CREDITS.length > 0 && (
+        <p className="mt-2">
+          Additional ideas and design from{" "}
+          {IDEA_CREDITS.map((c, i) => (
+            <span key={c.handle}>
+              {i > 0 && (i === IDEA_CREDITS.length - 1 ? " and " : ", ")}
+              <a
+                href={c.url}
+                target="_blank"
+                rel="noreferrer noopener"
+                className={LINK}
+              >
+                {c.handle}
+              </a>
+            </span>
+          ))}
+          {"."}
+        </p>
+      )}
+
       {/*
         Placed under the disclaimer that admits dates can be wrong, because that
         paragraph is where a reader who has just found one is looking. The bug