fix(changelog): break pagination when commits pass date cutoff

Gitea's commits API ignores the 'since' param, returning all 360+
commits regardless. Added client-side date filtering: skip commits
older than the cutoff and break pagination early once a page contains
commits past the cutoff. Prevents fetching 7+ pages on every load.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

changelog.njk

@@ -181,10 +181,14 @@ function changelogApp() {
             if (!r.ok) break;
             const commits = await r.json();
             if (!Array.isArray(commits) || commits.length === 0) break;
+            const sinceDate = since ? new Date(since) : null;
+            let pastCutoff = false;
             for (const c of commits) {
               const lines = (c.commit?.message || '').split('\n');
               const title = lines[0];
               const body = lines.slice(1).join('\n').trim();
+              const date = c.created || c.commit?.author?.date;
+              if (sinceDate && new Date(date) < sinceDate) { pastCutoff = true; continue; }
               allCommits.push({
                 sha: c.sha.slice(0, 7),
                 fullSha: c.sha,
@@ -193,12 +197,12 @@ function changelogApp() {
                 url: c.html_url,
                 repoUrl: `${GITEA_URL}/${GITEA_ORG}/${repo}`,
                 repoName: repo,
-                date: c.created || c.commit?.author?.date,
+                date,
                 author: c.commit?.author?.name || '',
                 commitCategory: categorizeCommit(title),
               });
             }
-            if (commits.length < limit) break;
+            if (commits.length < limit || pastCutoff) break;
             page++;
           }
         }));