chore: refactor legacy JS init code to use "data-global-init" (#39836)

Move the remaining legacy init code, which probed page classes with
`querySelector`, to `data-global-init`, so each feature initializes from
its own element. `hashchange` listeners now go through one module that
runs them in priority order, because independent listeners broke when
mount order changed.

- Convert issue list, diff, repo create, settings and org team inits to
`data-global-init`
- Run `hashchange` listeners by priority, the diff scroll handler last
- Make the devtest mock's failing log requests deterministic
- Add e2e tests for diff tree navigation to folded files and job log
permalinks

---------

Co-authored-by: silverwind <me@silverwind.io>

tests/e2e/actions.test.ts

@@ -27,3 +27,8 @@ test('job queue refreshes with filter open', async ({page, request}) => {
   await expect(page.getByRole('link', {name: 'queued #2'})).toBeVisible();
   await expect(waitingFilter).toBeVisible();
 });
+
+test('job log line permalink expands its step', async ({page}) => {
+  await page.goto('/devtest/repo-action-view/runs/10/jobs/1#jobstep-1-23');
+  await expect(page.getByRole('link', {name: '23', exact: true})).toBeInViewport();
+});

tests/e2e/pr-diff-filter.test.ts

@@ -1,7 +1,7 @@
 import {test, expect} from '@playwright/test';
 import {apiCreateFiles, apiCreatePR, apiCreateRepo, apiCreateUser, apiUserHeaders, loginUser, randomString} from './utils.ts';
 
-test('diff sidebar filtering', async ({page, request}) => {
+test('diff sidebar filtering and folded file navigation', async ({page, request}) => {
   const user = `df-${randomString(8)}`;
   await apiCreateUser(request, user);
   const headers = apiUserHeaders(user);
@@ -12,7 +12,7 @@ test('diff sidebar filtering', async ({page, request}) => {
     {path: 'src/a.ts', content: 'a\n'},
     {path: 'src/b.ts', content: 'b\n'},
     {path: 'src/.eslintrc', content: 'e\n'}, // dotfiles count as "No extension"
-    {path: 'styles/x.css', content: 'x\n'},
+    {path: 'styles/x.css', content: 'x\n'.repeat(150)},
     {path: 'docs/intro.md', content: 'r\n'},
     {path: 'Makefile', content: 'm\n'},
   ], {branch: 'main', newBranch: 'feat', headers});
@@ -34,6 +34,12 @@ test('diff sidebar filtering', async ({page, request}) => {
   const treeWidth = (await tree.boundingBox())!.width;
   expect(boxesWidth).toBeGreaterThan(treeWidth * 2);
 
+  await page.getByLabel('Diff Options').click();
+  await page.getByRole('menuitem', {name: 'Collapse all files'}).click();
+  await tree.getByRole('link', {name: 'x.css'}).click();
+  const cssFileHeader = page.getByRole('link', {name: 'styles/x.css', exact: true});
+  await expect.poll(async () => (await cssFileHeader.boundingBox())!.y).toBeLessThan(page.viewportSize()!.height / 2);
+
   // search filters tree and file boxes
   await search.fill('a.ts');
   await expect(items).toHaveText([/a\.ts/]);