refactor(admin): share the GitHub release history between desktop and phone

useGithubReleases holds the paged fetch, the prerelease filter, the expanded rows and the date format, and parseReleaseNotes splits a release body into the blocks both panels draw. The phone keeps its page walk past hidden prereleases through the fillPages option, its repository link and its own inline link scan; the desktop keeps one page per load.

client/src/utils/releaseNotes.test.ts

@@ -0,0 +1,44 @@
+// FE-UTIL-RELNOTES-001 to -005: the release body parser both admin shells render from.
+import { escapeReleaseHtml, parseReleaseNotes } from './releaseNotes';
+
+describe('parseReleaseNotes', () => {
+  it('FE-UTIL-RELNOTES-001: reads headings, paragraphs and list items', () => {
+    expect(parseReleaseNotes('## Release\n### Fixed\nSome text\n- one\n* two')).toEqual([
+      { kind: 'h3', text: 'Release' },
+      { kind: 'h4', text: 'Fixed' },
+      { kind: 'p', text: 'Some text' },
+      { kind: 'ul', items: ['one', 'two'] },
+    ]);
+  });
+
+  it('FE-UTIL-RELNOTES-002: a blank line or any other block ends a list', () => {
+    expect(parseReleaseNotes('- a\n\n- b\nplain\n- c\n### H\n- d')).toEqual([
+      { kind: 'ul', items: ['a'] },
+      { kind: 'ul', items: ['b'] },
+      { kind: 'p', text: 'plain' },
+      { kind: 'ul', items: ['c'] },
+      { kind: 'h4', text: 'H' },
+      { kind: 'ul', items: ['d'] },
+    ]);
+  });
+
+  it('FE-UTIL-RELNOTES-003: lines are trimmed and markers need their space', () => {
+    expect(parseReleaseNotes('   ## Spaced  \n-no space\n#### deep\n\n\n')).toEqual([
+      { kind: 'h3', text: 'Spaced' },
+      { kind: 'p', text: '-no space' },
+      { kind: 'p', text: '#### deep' },
+    ]);
+  });
+
+  it('FE-UTIL-RELNOTES-004: an empty body has no blocks', () => {
+    expect(parseReleaseNotes('')).toEqual([]);
+  });
+});
+
+describe('escapeReleaseHtml', () => {
+  it('FE-UTIL-RELNOTES-005: escapes ampersands, angle brackets and double quotes only', () => {
+    expect(escapeReleaseHtml(`<a href="x">Tom & Jerry's</a>`)).toBe(
+      "&lt;a href=&quot;x&quot;&gt;Tom &amp; Jerry's&lt;/a&gt;"
+    );
+  });
+});