refactor(stage-tamagotchi): drop Steam userData isolation

apps/stage-tamagotchi/src/main/app/userData.test.ts

@@ -1,40 +0,0 @@
-import { join } from 'node:path'
-
-import { describe, expect, it } from 'vitest'
-
-import { resolveUserDataPath } from './userData'
-
-describe('resolveUserDataPath', () => {
-  it('keeps the Electron default for direct builds', () => {
-    expect(resolveUserDataPath({
-      defaultPath: join('app-data', 'AIRI'),
-      distribution: 'direct',
-    })).toBeUndefined()
-  })
-
-  it('prefers an explicit operational override', () => {
-    expect(resolveUserDataPath({
-      defaultPath: join('app-data', 'AIRI'),
-      distribution: 'steam',
-      overridePath: `  ${join('test-data', 'airi')}  `,
-    })).toBe(join('test-data', 'airi'))
-  })
-
-  // https://github.com/moeru-ai/airi/pull/1966#discussion_r3432862899
-  it('isolates Steam user data from direct installations for PR #1966', () => {
-    // ROOT CAUSE:
-    //
-    // Steam and direct builds both accepted Electron's default userData path,
-    // so a Steam launch could restore credentials and local state written by a
-    // direct installation before startup Steam authentication ran.
-    //
-    // Before the fix, this returned undefined and kept the shared default.
-    //
-    // We fixed this by deriving a Steam-only sibling directory while keeping
-    // the explicit APP_USER_DATA_PATH override authoritative.
-    expect(resolveUserDataPath({
-      defaultPath: join('app-data', 'AIRI'),
-      distribution: 'steam',
-    })).toBe(join('app-data', 'AIRI-steam'))
-  })
-})

apps/stage-tamagotchi/src/main/app/userData.ts

@@ -1,31 +0,0 @@
-import { basename, dirname, join } from 'node:path'
-
-/**
- * Selects an explicit Electron user-data directory when the runtime requests
- * one. Returning `undefined` preserves Electron's default directory.
- *
- * `APP_USER_DATA_PATH` is an operational override used by smoke tests and
- * remains authoritative over build-distribution policy. Steam builds use a
- * sibling directory so channel-local credentials, plugins, settings, and
- * caches cannot be restored from a direct installation.
- */
-export function resolveUserDataPath(params: {
-  defaultPath: string
-  distribution?: string
-  overridePath?: string
-}): string | undefined {
-  const overridePath = params.overridePath?.trim()
-  if (overridePath)
-    return overridePath
-
-  if (params.distribution === 'steam') {
-    // Derive from Electron's platform-specific default instead of hardcoding
-    // macOS, Windows, or Linux application-data locations.
-    return join(
-      dirname(params.defaultPath),
-      `${basename(params.defaultPath)}-steam`,
-    )
-  }
-
-  return undefined
-}

apps/stage-tamagotchi/src/main/index.ts

@@ -23,7 +23,6 @@ import icon from '../../resources/icon.png?asset'
 import { openDebugger, setupDebugger } from './app/debugger'
 import { nullFileLoggerHandle, setupFileLogger } from './app/file-logger'
 import { installSingleInstanceGuard } from './app/single-instance'
-import { resolveUserDataPath } from './app/userData'
 import { createArtistryConfig } from './configs/artistry'
 import { createGlobalAppConfig } from './configs/global'
 import { emitAppBeforeQuit, emitAppReady, emitAppWindowAllClosed } from './libs/bootkit/lifecycle'
@@ -66,11 +65,7 @@ setupDebugger()
 
 const log = useLogg('main').useGlobalConfig()
 
-const appUserDataPath = resolveUserDataPath({
-  defaultPath: app.getPath('userData'),
-  distribution: import.meta.env.VITE_DISTRIBUTION,
-  overridePath: env.APP_USER_DATA_PATH,
-})
+const appUserDataPath = env.APP_USER_DATA_PATH?.trim()
 if (appUserDataPath) {
   app.setPath('userData', appUserDataPath)
 }