fix(desktop): preserve main window bounds

apps/desktop/src/app/DesktopLifecycle.ts

@@ -73,8 +73,14 @@ function addScopedListener<Args extends ReadonlyArray<unknown>>(
 }
 
 const requestDesktopShutdownAndWait = Effect.fn("desktop.lifecycle.requestShutdownAndWait")(
-  function* (): Effect.fn.Return<void, never, DesktopShutdown.DesktopShutdown> {
+  function* (): Effect.fn.Return<
+    void,
+    never,
+    DesktopShutdown.DesktopShutdown | DesktopWindow.DesktopWindow
+  > {
     const shutdown = yield* DesktopShutdown.DesktopShutdown;
+    const desktopWindow = yield* DesktopWindow.DesktopWindow;
+    yield* desktopWindow.flushMainWindowBounds;
     yield* shutdown.request;
     yield* shutdown.awaitComplete;
   },

apps/desktop/src/backend/DesktopBackendPool.test.ts

@@ -76,6 +76,7 @@ function makePoolLayer(
           showConnectingSplash: Effect.void,
           handleBackendReady: () => Effect.void,
           handleBackendNotReady: Effect.void,
+          flushMainWindowBounds: Effect.void,
           dispatchMenuAction: () => Effect.die("unexpected menu action"),
           syncAppearance: Effect.void,
         } satisfies DesktopWindow.DesktopWindow["Service"]),

apps/desktop/src/backend/DesktopServerExposure.test.ts

@@ -250,6 +250,7 @@ describe("DesktopServerExposure", () => {
     const settingsLayer = Layer.succeed(DesktopAppSettings.DesktopAppSettings, {
       get: Effect.succeed(DesktopAppSettings.DEFAULT_DESKTOP_SETTINGS),
       load: Effect.succeed(DesktopAppSettings.DEFAULT_DESKTOP_SETTINGS),
+      setMainWindowBounds: () => Effect.die("unexpected main window bounds update"),
       setServerExposureMode: () => Effect.fail(settingsFailure),
       setTailscaleServe: () => Effect.fail(settingsFailure),
       setUpdateChannel: () => Effect.die("unexpected update channel change"),

apps/desktop/src/settings/DesktopAppSettings.test.ts

@@ -11,6 +11,16 @@ import * as DesktopEnvironment from "../app/DesktopEnvironment.ts";
 import * as DesktopAppSettings from "./DesktopAppSettings.ts";
 
 const DesktopSettingsPatch = Schema.Struct({
+  mainWindowBounds: Schema.optionalKey(
+    Schema.NullOr(
+      Schema.Struct({
+        x: Schema.Number,
+        y: Schema.Number,
+        width: Schema.Number,
+        height: Schema.Number,
+      }),
+    ),
+  ),
   serverExposureMode: Schema.optionalKey(Schema.Literals(["local-only", "network-accessible"])),
   tailscaleServeEnabled: Schema.optionalKey(Schema.Boolean),
   tailscaleServePort: Schema.optionalKey(Schema.Number),
@@ -91,6 +101,7 @@ describe("DesktopSettings", () => {
     assert.deepEqual(
       DesktopAppSettings.resolveDefaultDesktopSettings("0.0.17-nightly.20260415.1"),
       {
+        mainWindowBounds: null,
         serverExposureMode: "local-only",
         tailscaleServeEnabled: false,
         tailscaleServePort: 443,
@@ -116,6 +127,7 @@ describe("DesktopSettings", () => {
         });
 
         assert.deepEqual(yield* settings.load, {
+          mainWindowBounds: null,
           serverExposureMode: "network-accessible",
           tailscaleServeEnabled: true,
           tailscaleServePort: 8443,
@@ -215,10 +227,12 @@ describe("DesktopSettings", () => {
             "serverExposureMode": "network-accessible",
             "tailscaleServeEnabled": true,
             "tailscaleServePort": 8443,
+            "mainWindowBounds": { "x": 120, "y": 80, "width": 1280, "height": 900 },
           }\n`,
         );
 
         assert.deepEqual(yield* settings.load, {
+          mainWindowBounds: { x: 120, y: 80, width: 1280, height: 900 },
           serverExposureMode: "network-accessible",
           tailscaleServeEnabled: true,
           tailscaleServePort: 8443,
@@ -232,19 +246,37 @@ describe("DesktopSettings", () => {
     ),
   );
 
+  it.effect("rejects window bounds that do not satisfy the domain schema", () =>
+    withSettings(
+      Effect.gen(function* () {
+        const settings = yield* DesktopAppSettings.DesktopAppSettings;
+        yield* writeSettingsPatch({
+          mainWindowBounds: { x: 10.5, y: 20, width: 839, height: 620 },
+          serverExposureMode: "network-accessible",
+        });
+
+        const loaded = yield* settings.load;
+        assert.isNull(loaded.mainWindowBounds);
+        assert.equal(loaded.serverExposureMode, "network-accessible");
+      }),
+    ),
+  );
+
   it.effect("persists sparse desktop settings documents", () =>
     withSettings(
       Effect.gen(function* () {
         const environment = yield* DesktopEnvironment.DesktopEnvironment;
         const fileSystem = yield* FileSystem.FileSystem;
         const settings = yield* DesktopAppSettings.DesktopAppSettings;
 
+        yield* settings.setMainWindowBounds({ x: -1200, y: 40, width: 1440, height: 960 });
         yield* settings.setServerExposureMode("network-accessible");
 
         const persisted = yield* decodeDesktopSettingsPatch(
           yield* fileSystem.readFileString(environment.desktopSettingsPath),
         );
         assert.deepEqual(persisted, {
+          mainWindowBounds: { x: -1200, y: 40, width: 1440, height: 960 },
           serverExposureMode: "network-accessible",
         } satisfies typeof DesktopSettingsPatch.Type);
       }),
@@ -261,6 +293,7 @@ describe("DesktopSettings", () => {
         });
 
         assert.deepEqual(yield* settings.load, {
+          mainWindowBounds: null,
           serverExposureMode: "local-only",
           tailscaleServeEnabled: false,
           tailscaleServePort: 443,
@@ -286,6 +319,7 @@ describe("DesktopSettings", () => {
         });
 
         assert.deepEqual(yield* settings.load, {
+          mainWindowBounds: null,
           serverExposureMode: "local-only",
           tailscaleServeEnabled: false,
           tailscaleServePort: 443,
@@ -310,6 +344,7 @@ describe("DesktopSettings", () => {
         });
 
         assert.deepEqual(yield* settings.load, {
+          mainWindowBounds: null,
           serverExposureMode: "local-only",
           tailscaleServeEnabled: true,
           tailscaleServePort: 443,

apps/desktop/src/settings/DesktopAppSettings.ts

@@ -20,6 +20,7 @@ import { resolveDefaultDesktopUpdateChannel } from "../updates/updateChannels.ts
 import { isValidDistroName } from "../wsl/wslPathParsing.ts";
 
 export interface DesktopSettings {
+  readonly mainWindowBounds: DesktopWindowBounds | null;
   readonly serverExposureMode: DesktopServerExposureMode;
   readonly tailscaleServeEnabled: boolean;
   readonly tailscaleServePort: number;
@@ -48,8 +49,24 @@ export interface DesktopSettingsChange {
 }
 
 export const DEFAULT_TAILSCALE_SERVE_PORT = 443;
+const MIN_MAIN_WINDOW_SIZE = {
+  width: 840,
+  height: 620,
+} as const;
+export const DesktopWindowBoundsSchema = Schema.Struct({
+  x: Schema.Int,
+  y: Schema.Int,
+  width: Schema.Int.check(Schema.isGreaterThanOrEqualTo(MIN_MAIN_WINDOW_SIZE.width)),
+  height: Schema.Int.check(Schema.isGreaterThanOrEqualTo(MIN_MAIN_WINDOW_SIZE.height)),
+});
+export type DesktopWindowBounds = typeof DesktopWindowBoundsSchema.Type;
+export const DEFAULT_MAIN_WINDOW_SIZE = {
+  width: 1100,
+  height: 780,
+} as const;
 
 export const DEFAULT_DESKTOP_SETTINGS: DesktopSettings = {
+  mainWindowBounds: null,
   serverExposureMode: "local-only",
   tailscaleServeEnabled: false,
   tailscaleServePort: DEFAULT_TAILSCALE_SERVE_PORT,
@@ -60,7 +77,15 @@ export const DEFAULT_DESKTOP_SETTINGS: DesktopSettings = {
   wslOnly: false,
 };
 
+const DesktopWindowBoundsDocument = Schema.Struct({
+  x: Schema.Number,
+  y: Schema.Number,
+  width: Schema.Number,
+  height: Schema.Number,
+});
+
 const DesktopSettingsDocument = Schema.Struct({
+  mainWindowBounds: Schema.optionalKey(Schema.NullOr(DesktopWindowBoundsDocument)),
   serverExposureMode: Schema.optionalKey(DesktopServerExposureModeSchema),
   tailscaleServeEnabled: Schema.optionalKey(Schema.Boolean),
   tailscaleServePort: Schema.optionalKey(Schema.Number),
@@ -81,6 +106,8 @@ type Mutable<T> = { -readonly [K in keyof T]: T[K] };
 const DesktopSettingsJson = fromLenientJson(DesktopSettingsDocument);
 const decodeDesktopSettingsJson = Schema.decodeEffect(DesktopSettingsJson);
 const encodeDesktopSettingsJson = Schema.encodeEffect(DesktopSettingsJson);
+const decodeDesktopWindowBounds = Schema.decodeUnknownOption(DesktopWindowBoundsSchema);
+const desktopWindowBoundsEquivalence = Schema.toEquivalence(DesktopWindowBoundsSchema);
 
 const settingsChange = (settings: DesktopSettings, changed: boolean): DesktopSettingsChange => ({
   settings,
@@ -114,6 +141,9 @@ export class DesktopAppSettings extends Context.Service<
   {
     readonly load: Effect.Effect<DesktopSettings>;
     readonly get: Effect.Effect<DesktopSettings>;
+    readonly setMainWindowBounds: (
+      bounds: DesktopWindowBounds,
+    ) => Effect.Effect<DesktopSettingsChange, DesktopSettingsWriteError>;
     readonly setServerExposureMode: (
       mode: DesktopServerExposureMode,
     ) => Effect.Effect<DesktopSettingsChange, DesktopSettingsWriteError>;
@@ -158,6 +188,10 @@ function normalizeWslDistro(value: unknown): string | null {
   return typeof value === "string" && isValidDistroName(value) ? value : null;
 }
 
+function normalizeMainWindowBounds(value: unknown): DesktopWindowBounds | null {
+  return Option.getOrNull(decodeDesktopWindowBounds(value));
+}
+
 function normalizeDesktopSettingsDocument(
   parsed: DesktopSettingsDocument,
   appVersion: string,
@@ -177,6 +211,7 @@ function normalizeDesktopSettingsDocument(
     (parsed.wslBackendEnabled === undefined && parsed.wslMode === "wsl");
 
   return {
+    mainWindowBounds: normalizeMainWindowBounds(parsed.mainWindowBounds),
     serverExposureMode:
       parsed.serverExposureMode === "network-accessible" ? "network-accessible" : "local-only",
     tailscaleServeEnabled: parsed.tailscaleServeEnabled === true,
@@ -197,6 +232,9 @@ function toDesktopSettingsDocument(
 ): DesktopSettingsDocument {
   const document: Mutable<DesktopSettingsDocument> = {};
 
+  if (settings.mainWindowBounds !== null) {
+    document.mainWindowBounds = settings.mainWindowBounds;
+  }
   if (settings.serverExposureMode !== defaults.serverExposureMode) {
     document.serverExposureMode = settings.serverExposureMode;
   }
@@ -237,6 +275,19 @@ function setServerExposureMode(
       };
 }
 
+function setMainWindowBounds(
+  settings: DesktopSettings,
+  bounds: DesktopWindowBounds,
+): DesktopSettings {
+  return settings.mainWindowBounds !== null &&
+    desktopWindowBoundsEquivalence(settings.mainWindowBounds, bounds)
+    ? settings
+    : {
+        ...settings,
+        mainWindowBounds: bounds,
+      };
+}
+
 function setTailscaleServe(
   settings: DesktopSettings,
   input: { readonly enabled: boolean; readonly port: Option.Option<number> },
@@ -431,6 +482,17 @@ export const make = Effect.gen(function* () {
       );
       return yield* SynchronizedRef.setAndGet(settingsRef, settings);
     }).pipe(Effect.withSpan("desktop.settings.load")),
+    setMainWindowBounds: (bounds) =>
+      persist((settings) => setMainWindowBounds(settings, bounds)).pipe(
+        Effect.withSpan("desktop.settings.setMainWindowBounds", {
+          attributes: {
+            x: bounds.x,
+            y: bounds.y,
+            width: bounds.width,
+            height: bounds.height,
+          },
+        }),
+      ),
     setServerExposureMode: (mode) =>
       persist((settings) => setServerExposureMode(settings, mode)).pipe(
         Effect.withSpan("desktop.settings.setServerExposureMode", { attributes: { mode } }),
@@ -488,6 +550,8 @@ export const layerTest = (initialSettings: DesktopSettings = DEFAULT_DESKTOP_SET
       return DesktopAppSettings.of({
         get: SynchronizedRef.get(settingsRef),
         load: SynchronizedRef.get(settingsRef),
+        setMainWindowBounds: (bounds) =>
+          update((settings) => setMainWindowBounds(settings, bounds)),
         setServerExposureMode: (mode) =>
           update((settings) => setServerExposureMode(settings, mode)),
         setTailscaleServe: (input) => update((settings) => setTailscaleServe(settings, input)),

apps/desktop/src/updates/DesktopUpdates.test.ts

@@ -158,6 +158,7 @@ function makeHarness(options: UpdatesHarnessOptions = {}) {
     ? Layer.succeed(DesktopAppSettings.DesktopAppSettings, {
         get: Effect.succeed(DesktopAppSettings.DEFAULT_DESKTOP_SETTINGS),
         load: Effect.succeed(DesktopAppSettings.DEFAULT_DESKTOP_SETTINGS),
+        setMainWindowBounds: () => Effect.die("unexpected main window bounds update"),
         setServerExposureMode: () => Effect.die("unexpected server exposure update"),
         setTailscaleServe: () => Effect.die("unexpected Tailscale Serve update"),
         setUpdateChannel: () => Effect.fail(setUpdateChannelError),

apps/desktop/src/window/DesktopApplicationMenu.test.ts

@@ -76,6 +76,7 @@ const makeDesktopWindowLayer = (selectedAction: Deferred.Deferred<string>) =>
     showConnectingSplash: Effect.void,
     handleBackendReady: () => Effect.void,
     handleBackendNotReady: Effect.void,
+    flushMainWindowBounds: Effect.void,
     dispatchMenuAction: (action) => Deferred.succeed(selectedAction, action).pipe(Effect.asVoid),
     syncAppearance: Effect.void,
   } satisfies DesktopWindow.DesktopWindow["Service"]);