fix: Auth::user returning null Error on Guest share

[benatoff]

On guest share Auth::user() returns null and throws subsequent error since ->can cannot be called on null. Gate::allows() handles its own user identification.

[Copilot]

Pull Request Overview

This PR fixes an error occurring on guest shares where Auth::user() returns null, causing a fatal error when calling ->can on null. Key changes include:

• Replacing Auth::user()->can() calls with Gate::authorize() in the Livewire component.
• Adjusting view templates to conditionally render controls based on authentication.
• Modifying test cases to validate guest and authenticated access scenarios.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/Feature/Livewire/Chats/ShowTest.php	Updated test descriptions and added tests for guest chat access.
resources/views/livewire/chats/show/message-input.blade.php	Removed inline update authorization (@can) block from the message input view.
resources/views/livewire/chats/show.blade.php	Wrapped message input inclusion within an @auth directive.
app/Policies/ChatPolicy.php	Updated chat view policy to safely handle guest users.
app/Livewire/Chats/Show.php	Replaced Auth::user()->can() checks with Gate::authorize() to handle authorization.

Comments suppressed due to low confidence (1)

resources/views/livewire/chats/show/message-input.blade.php:18

• [nitpick] Consider adding an inline comment to clarify that the authorization check was removed because the parent's view (@auth) and Livewire component now handle it, preventing confusion for future maintainers.

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[kauffinger]

Good catch, thanks. Added tests and simplified the gate logic & will merge now 🚀