🐛 Add trigger_onepick OAuth param for Google Sheets picker (#2487)

- Add `trigger_onepick=true` parameter to the Google Sheets OAuth
consent URL, required by Google for the `drive.file` scope since the
April 21, 2026 enforcement; without it the picker iframe returns 401.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/builder/src/features/blocks/integrations/googleSheets/api/handleGetConsentUrl.ts

@@ -29,6 +29,7 @@ export const handleGetConsentUrl = async ({
     access_type: "offline",
     scope: googleSheetsScopes,
     prompt: "consent",
+    trigger_onepick: "true",
     state: Buffer.from(JSON.stringify(input)).toString("base64"),
   });
   return {