Fix port validation in bootstrap schema and readiness timeout recovery

- Use PortSchema (Int, 1-65535) for port and tailscaleServePort in
  DesktopBackendBootstrap instead of Schema.Number, restoring the range
  and integer validation that was present in the old BootstrapEnvelopeSchema.
  Extract PortSchema to contracts/baseSchemas.ts for shared use.

- Create a window as fallback when the backend readiness probe times out,
  so the user isn't left with no UI and no recovery path. The web app
  will show a reconnection state until the backend becomes available.

Author: cursoragent

apps/desktop/src/main.ts

@@ -1496,6 +1496,12 @@ function startBackend(): void {
             `bootstrap backend readiness warning message=${formatErrorMessage(error)}`,
           );
           console.warn("[desktop] backend readiness check failed during bootstrap", error);
+
+          if (isDevelopment) return;
+          const existingWindow = mainWindow ?? BrowserWindow.getAllWindows()[0] ?? null;
+          if (existingWindow !== null) return;
+          mainWindow = createWindow();
+          writeDesktopLogHeader("bootstrap main window created (readiness timeout fallback)");
         }),
       onOutput: (streamName, chunk) =>
         Effect.sync(() => {

apps/server/src/cli.ts

@@ -5,6 +5,7 @@ import {
   CommandId,
   DesktopBackendBootstrap,
   OrchestrationReadModel,
+  PortSchema,
   ProjectId,
   type ClientOrchestrationCommand,
 } from "@t3tools/contracts";
@@ -67,8 +68,6 @@ import {
 import { WorkspacePaths } from "./workspace/Services/WorkspacePaths.ts";
 import { WorkspacePathsLive } from "./workspace/Layers/WorkspacePaths.ts";
 
-const PortSchema = Schema.Int.check(Schema.isBetween({ minimum: 1, maximum: 65535 }));
-
 const modeFlag = Flag.choice("mode", RuntimeMode.literals).pipe(
   Flag.withDescription("Runtime mode. `desktop` keeps loopback defaults unless overridden."),
   Flag.optional,

packages/contracts/src/baseSchemas.ts

@@ -5,6 +5,7 @@ export const TrimmedNonEmptyString = TrimmedString.check(Schema.isNonEmpty());
 
 export const NonNegativeInt = Schema.Int.check(Schema.isGreaterThanOrEqualTo(0));
 export const PositiveInt = Schema.Int.check(Schema.isGreaterThanOrEqualTo(1));
+export const PortSchema = Schema.Int.check(Schema.isBetween({ minimum: 1, maximum: 65535 }));
 
 export const IsoDateTime = Schema.String;
 export type IsoDateTime = typeof IsoDateTime.Type;

packages/contracts/src/desktopBootstrap.ts

@@ -1,14 +1,16 @@
 import { Schema } from "effect";
 
+import { PortSchema } from "./baseSchemas.ts";
+
 export const DesktopBackendBootstrap = Schema.Struct({
   mode: Schema.Literal("desktop"),
   noBrowser: Schema.Boolean,
-  port: Schema.Number,
+  port: PortSchema,
   t3Home: Schema.String,
   host: Schema.String,
   desktopBootstrapToken: Schema.String,
   tailscaleServeEnabled: Schema.Boolean,
-  tailscaleServePort: Schema.Number,
+  tailscaleServePort: PortSchema,
   otlpTracesUrl: Schema.optional(Schema.String),
   otlpMetricsUrl: Schema.optional(Schema.String),
 });