fix(apps): eliminate blank-app window on launch and add crash visibility

- start the apps server before createWindow instead of after the full
  service-init chain: the Apps view was reachable ~10s before port 3210
  was listening, so every app iframe opened to connection-refused
- retry EADDRINUSE binds (quick relaunch races left the server disabled
  for the whole session with no retry)
- app frame: auto-retry the iframe instead of a dead manual Retry, and
  surface when the apps server itself is down (new apps:serverStatus)
- log render-process-gone/child-process-gone reasons; renderer helper
  crashes were previously invisible in packaged builds

apps/x/packages/shared/src/ipc.ts

@@ -1228,6 +1228,13 @@ const ipcSchemas = {
     }),
   },
   // Rowboat Apps (spec §13) — M1 local channels.
+  'apps:serverStatus': {
+    req: z.object({}),
+    res: z.object({
+      running: z.boolean(),
+      error: z.string().optional(),
+    }),
+  },
   'apps:list': {
     req: z.object({}),
     res: z.object({