Fix admin infrastructure sidebar routes across deployments

[smshagor-dev]

Summary

This hardens the admin infrastructure navigation on top of the latest main, which already contains the requested admin safe-string handling and DB-backed Google/Facebook/Telegram configuration.

Changes

• Use exact generated HTML routes for left-sidebar items:
  • Native Call Push
  • Calling & WebRTC
  • FTP Storage
  • Social Login
• Keep the Native Call Push → Calling link on the standalone Calling page.
• Add Apache rewrites for the four standalone admin tool routes before the generic /admin/* SPA fallback.

Why

Vercel has explicit rewrites for the extensionless admin tool paths, but Apache's generic admin SPA fallback otherwise serves admin/index.html for those same paths. Exact generated routes plus matching Apache rules make the sidebar work consistently across Vercel, Apache, and static/Node hosting.

Verified on latest main

• Admin toLowerCase calls are build-hardened by babel.admin-safe-strings.js.
• Social-login runtime routes use the DB-backed social-auth controller.
• Google/Facebook/Telegram configuration is stored in the database; provider secrets are encrypted and are not sourced from provider env vars at runtime.

[vercel]

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