Debug: show API base URL on login page

[gitgrahamdunn]

Motivation

• Surface the resolved API base URL on the Sign in page to help debug environment configuration when login requests fail.
• Log the final URL used by the login request to confirm the exact endpoint being called at runtime.

Description

• Exported getApiBaseUrl() from frontend/src/api.ts to expose the resolved API_BASE_URL (from VITE_API_URL or same-origin fallback).
• Added a console log in frontend/src/api.ts to print the final /auth/login URL right before the login request is performed, without changing request behavior.
• Updated frontend/src/components/LoginPanel.tsx to call getApiBaseUrl() and render a small debug line beneath the Sign in button showing API: <value>.
• Added minimal styling in frontend/src/styles.css for the debug line to keep it subtle and readable.

Testing

• Ran npm run build in frontend/ to validate the TypeScript and production build process, and the build completed successfully.
• Started the dev server with npm run dev and captured a screenshot of the login page using a headless browser to verify the debug text renders, which succeeded.

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Codex Task

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Project	Deployment	Actions	Updated (UTC)
gitplant	Ready	Preview, Comment	Feb 19, 2026 1:18am
gitplant-backend	Ready	Preview, Comment	Feb 19, 2026 1:18am
gitplant-oggy	Ready	Preview, Comment	Feb 19, 2026 1:18am