Mirror Google API key env aliases into managed OpenCode.

OpenCode can mark Google connected via GEMINI_API_KEY while the Generative AI
SDK only reads GOOGLE_GENERATIVE_AI_API_KEY, so chat asked for a key that was
already present. Alias unset sibling names on managed launch for web and VS Code.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

packages/web/server/lib/opencode/provider-env-aliases.test.js

@@ -0,0 +1,33 @@
+import { describe, expect, test } from 'bun:test';
+
+import { applyProviderEnvAliases } from './provider-env-aliases.js';
+
+describe('applyProviderEnvAliases', () => {
+  test('mirrors GEMINI_API_KEY onto Google Generative AI env names', () => {
+    expect(applyProviderEnvAliases({
+      GEMINI_API_KEY: 'AIza-demo',
+      PATH: '/usr/bin',
+    })).toEqual({
+      GEMINI_API_KEY: 'AIza-demo',
+      GOOGLE_API_KEY: 'AIza-demo',
+      GOOGLE_GENERATIVE_AI_API_KEY: 'AIza-demo',
+      PATH: '/usr/bin',
+    });
+  });
+
+  test('does not overwrite an already-set preferred Google key', () => {
+    expect(applyProviderEnvAliases({
+      GEMINI_API_KEY: 'from-gemini',
+      GOOGLE_GENERATIVE_AI_API_KEY: 'from-google',
+    })).toEqual({
+      GEMINI_API_KEY: 'from-gemini',
+      GOOGLE_API_KEY: 'from-google',
+      GOOGLE_GENERATIVE_AI_API_KEY: 'from-google',
+    });
+  });
+
+  test('returns empty object for invalid input', () => {
+    expect(applyProviderEnvAliases(null)).toEqual({});
+    expect(applyProviderEnvAliases(undefined)).toEqual({});
+  });
+});