Cleanup: Delete dead User model file (firebaseUid leftover from Firebase migration)

[ChitkulLakshya]

Improvement: Dead User model (firebaseUid) still exists as a file

File: server/models/User.js

Problem

The User MongoDB model with firebaseUid field is dead code — a leftover from the Firebase to Supabase migration (PR #12). Phase 6 (PR #31) removed all references to it from server/index.js, but the file itself still exists:

const userSchema = new mongoose.Schema({
  firebaseUid: { type: String, required: true, unique: true },
  departments: { type: [String], default: [] },
  createdAt: { type: Date, default: Date.now },
  updatedAt: { type: Date, default: Date.now }
});

Departments are now stored in Supabase's profiles table. No production code imports this model anymore.

Fix

Delete server/models/User.js. Verify no other files import it:

grep -r "models/User" server/

If any test files import it, remove those references too.

Severity

Low — Dead code. No runtime impact since it's never imported. But it's confusing for new developers who might think Firebase is still in use.

Phase

Original model from early project. References removed in Phase 6 (PR #31, open). File deletion pending.