feat: Desktop auth handoff, cross-device keybinds, and edge-triggered chat UI

[aninda8680]

Pull Request

Summary

Introduced an automated deep-link flow to authenticate the desktop client, added cross-device syncing for user keybinds, refined the room chat UI with hover interactions, and fixed a critical MongoDB indexing bug.

Related issue

• Fixes Desktop login not synced be web, socket issue, toggle mute keybind, ui bugs #45

Changes

• Desktop Authentication: Built an authentication handoff flow using callu:// custom protocols to securely pass session tokens to the desktop client.
• Keybinds Sync (Backend & UI): Added a new global "Toggle Mute" keybind. Updated the User schema and created a lightweight PATCH /api/users/keybinds route to sync user shortcuts (PTT & Mute) across all devices.
• Chat UI Enhancement: Added an invisible edge-trigger to the extreme right side of the screen in voice rooms, allowing the chat sidebar to slide open on hover and auto-close on mouse leave.
• Bug Fix: Removed a conflicting mobile_1 index that was causing a duplicate key error (E11000) for users without a mobile number during signup.

Testing

• Initiated a desktop login from the web browser and verified the token was successfully handed off to the Electron client.
• Verified that changing keybinds on the web instantly saves to MongoDB and accurately overrides the local cache on page reload.
• Tested the room chat panel to ensure hovering the right edge smoothly opens it and moving the cursor out automatically closes it.
• Tested new user signup to confirm the duplicate key error is entirely resolved.

Checklist

• I linked the related issue with Fixes #45 .
• I added or updated tests if needed.
• I updated docs if needed.
• I verified the change locally.

[github-actions]

✅ PR Validation Passed

Your PR title and description meet all requirements:

• Title follows conventional format
• All required sections are present
• Issue is properly linked (Desktop login not synced be web, socket issue, toggle mute keybind, ui bugs #45)

[github-actions]

✅ PR Validation Passed

Your PR title and description meet all requirements:

• Title follows conventional format
• All required sections are present
• Issue is properly linked (Desktop login not synced be web, socket issue, toggle mute keybind, ui bugs #45)

[github-actions]

✅ PR Validation Passed

Your PR title and description meet all requirements:

• Title follows conventional format
• All required sections are present
• Issue is properly linked (Desktop login not synced be web, socket issue, toggle mute keybind, ui bugs #45)

[github-actions]

✅ PR Validation Passed

Your PR title and description meet all requirements:

• Title follows conventional format
• All required sections are present
• Issue is properly linked (Desktop login not synced be web, socket issue, toggle mute keybind, ui bugs #45)

[github-actions]

✅ PR Validation Passed

Your PR title and description meet all requirements:

• Title follows conventional format
• All required sections are present
• Issue is properly linked (Desktop login not synced be web, socket issue, toggle mute keybind, ui bugs #45)