feat(phase1): rebrand to TTRPG Player and drop Git updates feed

Rename product to TTRPG Player (TTRPGPlayer / com.ttrpgplayer.app), use .ttrpg.zip for new saves while keeping .dnd.zip import, accept TTRPG- and DND- license keys on client, and remove sync-update-feed plus CI push to DndGamePlayerUpdates.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/main/index.ts

@@ -1,6 +1,14 @@
 import { app, BrowserWindow, dialog, Menu, protocol } from 'electron';
 
 import { ipcChannels, type SessionState } from '../shared/ipc/contracts';
+import {
+  PROJECT_ZIP_OPEN_DIALOG_FILTER,
+  PROJECT_ZIP_SAVE_DIALOG_FILTER,
+  isProjectZipFileName,
+  normalizeSaveProjectZipPath,
+  projectZipFileNameFromBase,
+  stripProjectZipExtension,
+} from '../shared/project/projectZipExtension';
 
 import { EffectsStore } from './effects/effectsStore';
 import { installIpcRouter, registerHandler, setLicenseAssert } from './ipc/router';
@@ -52,7 +60,7 @@ if (process.platform === 'win32' && app.isPackaged && process.env.DND_DISABLE_GP
 }
 
 if (process.platform === 'win32') {
-  app.setAppUserModelId('com.dndplayer.app');
+  app.setAppUserModelId('com.ttrpgplayer.app');
 }
 // Не вызывать app.setName() с другим именем: на Windows/macOS меняется каталог userData,
 // и проекты в …/userData/projects «пропадают» из списка (остаются в старой папке).
@@ -447,7 +455,7 @@ async function main() {
   registerHandler(ipcChannels.project.importZip, async () => {
     const { canceled, filePaths } = await dialog.showOpenDialog({
       properties: ['openFile'],
-      filters: [{ name: 'Проект DND (*.dnd.zip)', extensions: ['dnd.zip'] }],
+      filters: [PROJECT_ZIP_OPEN_DIALOG_FILTER],
     });
     if (canceled || !filePaths[0]) {
       return { canceled: true as const };
@@ -473,21 +481,19 @@ async function main() {
     if (!entry) {
       throw new Error('Проект не найден');
     }
-    const defaultName = entry.fileName.toLowerCase().endsWith('.dnd.zip')
-      ? entry.fileName
-      : `${entry.fileName}.dnd.zip`;
+    const defaultName = isProjectZipFileName(entry.fileName)
+      ? entry.fileName.toLowerCase().endsWith('.ttrpg.zip')
+        ? entry.fileName
+        : projectZipFileNameFromBase(stripProjectZipExtension(entry.fileName))
+      : projectZipFileNameFromBase(stripProjectZipExtension(entry.fileName));
     const { canceled, filePath } = await dialog.showSaveDialog({
       defaultPath: defaultName,
-      filters: [{ name: 'Проект DND (*.dnd.zip)', extensions: ['dnd.zip'] }],
+      filters: [PROJECT_ZIP_SAVE_DIALOG_FILTER],
     });
     if (canceled || !filePath) {
       return { canceled: true as const };
     }
-    let dest = filePath;
-    const lower = dest.toLowerCase();
-    if (!lower.endsWith('.dnd.zip')) {
-      dest = lower.endsWith('.zip') ? dest.replace(/\.zip$/iu, '.dnd.zip') : `${dest}.dnd.zip`;
-    }
+    const dest = normalizeSaveProjectZipPath(filePath);
     emitZipProgress({ kind: 'export', stage: 'copy', percent: 0, detail: 'Экспорт…' });
     await projectStore.exportProjectZipToPath(projectId, dest, (p) => {
       emitZipProgress({