Remove /login route in favour of / landing page

[devarshishimpi]

Description

The /login route was redundant — the / landing page already contains
the full sign-in UI (GitHub OAuth button, theme toggle, terms/privacy links).

Changes

• Remove /login route and LoginPage lazy import from routes.tsx
• Delete pages/login.tsx (dead code)
• Update 401 unauthorized redirects in api.ts from /login → /
• Update post-logout redirect in account-menu.tsx from /login → /
• Remove /login from run_worker_first in wrangler.jsonc

Closes #110

[codra-app-personal]

Codra Review

✅ Nothing to flag. Reviewed 4 files (53 changed lines) and found no issues worth raising.

Reviewed commit: 53088234e4

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[codra-app-personal]

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✅ Nothing to flag. Reviewed 5 files (75 changed lines) and found no issues worth raising.

Reviewed commit: 6642d47067

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[codra-app-personal]

Codra Review

✅ Nothing to flag. Reviewed 6 files (83 changed lines) and found no issues worth raising.

Reviewed commit: a660f86cc5

ℹ️ About Codra in GitHub

Your team has set up Codra to review pull requests in this repo. Reviews are triggered when you:

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