fix(mac): updater progress UI and skip redundant download

Show update stage in the modal, forward electron-updater progress over IPC,
and install immediately when the build is already cached. Rename window titles to TTRPG - *.

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

app/shared/ipc/contracts.ts

@@ -21,6 +21,7 @@ export const ipcChannels = {
   updater: {
     check: 'updater.check',
     downloadAndRestart: 'updater.downloadAndRestart',
+    progress: 'updater.progress',
   },
   project: {
     list: 'project.list',
@@ -97,6 +98,22 @@ export type UpdaterCheckResponse =
 
 export type UpdaterDownloadResponse = { ok: true } | { ok: false; message: string };
 
+export type UpdaterProgressPhase =
+  | 'checking'
+  | 'available'
+  | 'not-available'
+  | 'downloading'
+  | 'installing'
+  | 'error';
+
+export type UpdaterProgressEvent = {
+  phase: UpdaterProgressPhase;
+  /** 0..100 при phase=downloading */
+  percent?: number;
+  version?: string;
+  message?: string;
+};
+
 export type IpcEventMap = {
   [ipcChannels.session.stateChanged]: { state: SessionState };
   [ipcChannels.effects.stateChanged]: { state: EffectsState };
@@ -105,6 +122,7 @@ export type IpcEventMap = {
   [ipcChannels.windows.multiWindowStateChanged]: { open: boolean };
   [ipcChannels.project.importZipProgress]: ZipProgressEvent;
   [ipcChannels.project.exportZipProgress]: ZipProgressEvent;
+  [ipcChannels.updater.progress]: UpdaterProgressEvent;
 };
 
 export type IpcInvokeMap = {
@@ -121,7 +139,7 @@ export type IpcInvokeMap = {
     res: UpdaterCheckResponse;
   };
   [ipcChannels.updater.downloadAndRestart]: {
-    req: Record<string, never>;
+    req: { version: string };
     res: UpdaterDownloadResponse;
   };
   [ipcChannels.project.list]: {