Rename Game Maker to Feuerwerk and serve it at /feuerwerk/ (#422)

The editor gets a name of its own that fits beside Brandmauer,
Glutspeicher and Feuerwehr. This is stage 1, 2 and 4 of #422: the
name, the URL and the stored state in the browser. Repository, CI
runners, containers and the GAME_MAKER_* variables follow in stage 3.

- All paths come from SITE_PATH in src/core/site.ts: the API endpoint,
  the data folders, the play page and the base in vite.config.ts. A
  later move is one line instead of fifteen.
- The window title, the sign-in screen, the playground and the README
  say Feuerwerk. The package, __feuerwerkPlay, the take worklet and the
  writing app in Ogg and Matroska follow.
- The session cookie is now feuerwerk_session, so everyone signs in
  once more.
- localStorage keys are now feuerwerk.*. moveOldStoredKeys copies the
  old game-maker.* keys over on the first start, so settings, panel
  sizes and save games survive.
- tools/ci/serve.sh serves the build under /feuerwerk/. The variable
  GAME_MAKER_BASE_URL keeps its name until stage 3.

Outside the repository, nockal.com/feuerwerk/ is a second symlink to
the same tree. nginx sends the bare /game-maker/ folder there with a
301. Everything else under /game-maker/ is still served directly, so
shared play links and the API keep working.

Finding: when nginx redirects a path without a trailing slash or with
a query, the Brandmauer answers with its own 307 to the same URL plus
a slash, placed after the query. A play link would lose its token that
way, which is why only the bare folder is redirected.

Tests:
- Gate on melektaus-atx: CHECK EXIT 0, 307 files, 4756 tests
  (4 new in site.test.ts).
- Counter-check: when the migration misses the old prefix, 3 of the
  4 new tests fail.
- e2e 60 under /feuerwerk/: ALL PASSED, 20 checks.
- From outside: /feuerwerk/ 200, /game-maker/ 301, an old play
  link 200.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/core/matroska.test.ts

@@ -80,7 +80,7 @@ const HEAD: MatroskaHead = {
   },
   audio: { channels: 2, private: new TextEncoder().encode('OpusHead'), preSkip: 312 },
   durationMs: 1234.5,
-  app: 'game-maker',
+  app: 'feuerwerk',
 };
 
 /** The whole file: the head, then the clusters handed out before (`earlier`) and at the end. */

tests/core/releases.test.ts

@@ -34,7 +34,7 @@ beforeAll(async () => {
 describe('the link of a release', () => {
   it('leads to the play page with the token, and the play page reads it back', () => {
     const url = releaseUrl('https://nockal.com', TOKEN);
-    expect(url).toBe(`https://nockal.com/game-maker/play.html?game=${TOKEN}`);
+    expect(url).toBe(`https://nockal.com/feuerwerk/play.html?game=${TOKEN}`);
     expect(releaseToken(new URL(url).search)).toBe(TOKEN);
   });
 

tests/core/site.test.ts

@@ -0,0 +1,50 @@
+import { describe, expect, it } from 'vitest';
+import { API_ENDPOINT, dataPath, moveOldStoredKeys } from '../../src/core/site';
+
+function memoryStore(initial: Record<string, string>) {
+  const items = new Map(Object.entries(initial));
+  return {
+    items,
+    get length() {
+      return items.size;
+    },
+    key: (i: number) => [...items.keys()][i] ?? null,
+    getItem: (key: string) => items.get(key) ?? null,
+    setItem: (key: string, value: string) => void items.set(key, value),
+    removeItem: (key: string) => void items.delete(key),
+  };
+}
+
+describe('site', () => {
+  it('serves the API and the data files under /feuerwerk/', () => {
+    expect(API_ENDPOINT).toBe('/feuerwerk/api/index.php');
+    expect(dataPath('textures')).toBe('/feuerwerk/data/textures');
+  });
+
+  it('moves the keys stored under the old name and leaves the others alone', () => {
+    const store = memoryStore({
+      'game-maker.panel-sizes': '{"left":300}',
+      'game-maker.saves.p1.Savegame': '{"Lives":2}',
+      'other-site.key': 'x',
+    });
+    expect(moveOldStoredKeys(store)).toBe(2);
+    expect(Object.fromEntries(store.items)).toEqual({
+      'feuerwerk.panel-sizes': '{"left":300}',
+      'feuerwerk.saves.p1.Savegame': '{"Lives":2}',
+      'other-site.key': 'x',
+    });
+  });
+
+  it('keeps a value the new name already has and drops the old one', () => {
+    const store = memoryStore({ 'game-maker.general-settings': 'old', 'feuerwerk.general-settings': 'new' });
+    expect(moveOldStoredKeys(store)).toBe(0);
+    expect(Object.fromEntries(store.items)).toEqual({ 'feuerwerk.general-settings': 'new' });
+  });
+
+  it('does nothing the second time', () => {
+    const store = memoryStore({ 'game-maker.folded-sections': '[]' });
+    moveOldStoredKeys(store);
+    expect(moveOldStoredKeys(store)).toBe(0);
+    expect(Object.fromEntries(store.items)).toEqual({ 'feuerwerk.folded-sections': '[]' });
+  });
+});

tests/editor/panel-sizes.test.ts

@@ -2,7 +2,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import { keepPanelSize, panelSize, resetPanelSizes } from '../../src/editor/panelSizes';
 
-const STORAGE_KEY = 'game-maker.panel-sizes';
+const STORAGE_KEY = 'feuerwerk.panel-sizes';
 
 function memoryStore(initial: Record<string, string> = {}) {
   const items = new Map(Object.entries(initial));

tests/editor/sections.test.ts

@@ -264,7 +264,7 @@ describe('the memory of folded groups', () => {
     setFolded(key, true);
     expect(isFolded(key)).toBe(true);
     resetFolds();
-    vi.stubGlobal('window', { localStorage: memoryStore({ 'game-maker.folded-sections': '{broken' }) });
+    vi.stubGlobal('window', { localStorage: memoryStore({ 'feuerwerk.folded-sections': '{broken' }) });
     expect(isFolded(key)).toBe(false);
   });
 

tests/editor/view-tween.test.ts

@@ -405,7 +405,7 @@ describe('the general settings', () => {
     keepGeneralSettings({ zoomTransitionMs: 350 });
     resetGeneralSettings();
     expect(generalSettings().zoomTransitionMs).toBe(350);
-    expect(JSON.parse(store.items.get('game-maker.general-settings') ?? '')).toEqual({
+    expect(JSON.parse(store.items.get('feuerwerk.general-settings') ?? '')).toEqual({
       zoomTransitionMs: 350,
       showEmptyAssetGroups: false,
       customCursor: true,
@@ -437,7 +437,7 @@ describe('the general settings', () => {
     resetGeneralSettings();
     expect(generalSettings().customCursor).toBe(false);
     // Settings kept before the switch existed show it.
-    store.setItem('game-maker.general-settings', JSON.stringify({ zoomTransitionMs: 100 }));
+    store.setItem('feuerwerk.general-settings', JSON.stringify({ zoomTransitionMs: 100 }));
     resetGeneralSettings();
     expect(generalSettings().customCursor).toBe(true);
   });

tests/php/accounts.test.php

@@ -40,7 +40,7 @@ function throws(callable $work, string $class = InvalidArgumentException::class)
     return false;
 }
 
-$dir = sys_get_temp_dir() . '/game-maker-php-test-' . bin2hex(random_bytes(4));
+$dir = sys_get_temp_dir() . '/feuerwerk-php-test-' . bin2hex(random_bytes(4));
 mkdir($dir);
 $file = "{$dir}/users.json";
 

tests/php/files.test.php

@@ -35,7 +35,7 @@ function wav(string $tag): string
     return 'RIFF' . pack('V', 36) . 'WAVE' . str_repeat("\0", 32) . $tag;
 }
 
-$data = sys_get_temp_dir() . '/game-maker-php-files-' . bin2hex(random_bytes(4));
+$data = sys_get_temp_dir() . '/feuerwerk-php-files-' . bin2hex(random_bytes(4));
 mkdir("{$data}/projects", 0775, true);
 $users = new UserStore("{$data}/users.json");
 $users->put('ann', 'password1');

tests/php/releases.test.php

@@ -25,7 +25,7 @@ function check(string $name, bool $ok, mixed $got = null): void
     echo "FAIL  {$name}", $got === null ? '' : ' — got ' . json_encode($got), "\n";
 }
 
-$dir = sys_get_temp_dir() . '/game-maker-php-releases-' . bin2hex(random_bytes(4));
+$dir = sys_get_temp_dir() . '/feuerwerk-php-releases-' . bin2hex(random_bytes(4));
 mkdir($dir);
 $releases = new ReleaseStore($dir);
 

tests/php/snapshots.test.php

@@ -25,7 +25,7 @@ function check(string $name, bool $ok, mixed $got = null): void
     echo "FAIL  {$name}", $got === null ? '' : ' — got ' . json_encode($got), "\n";
 }
 
-$dir = sys_get_temp_dir() . '/game-maker-php-snapshots-' . bin2hex(random_bytes(4));
+$dir = sys_get_temp_dir() . '/feuerwerk-php-snapshots-' . bin2hex(random_bytes(4));
 mkdir($dir);
 $snapshots = new SnapshotStore($dir);
 

tests/php/videos.test.php

@@ -82,7 +82,7 @@ check('other lines say nothing', VideoFormat::progress('frame=12', 10.0) === nul
 check('progress never passes the end', VideoFormat::progress('out_time_us=99000000', 10.0) === 1.0);
 
 // The store and its queue.
-$data = sys_get_temp_dir() . '/game-maker-php-videos-' . bin2hex(random_bytes(4));
+$data = sys_get_temp_dir() . '/feuerwerk-php-videos-' . bin2hex(random_bytes(4));
 $store = new VideoStore("{$data}/videos");
 $folder = 'a1b2c3d4e5f6';
 $rejected = static function (string $bytes) use ($store, $folder): bool {