Tidy up homepage and navigation

app/models/issue.rb

@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 class Issue < ApplicationRecord
-  belongs_to :project
   has_many :events, dependent: :nullify
 
   enum :status, { open: 0, resolved: 1, ignored: 2 }
@@ -17,18 +16,18 @@ class Issue < ApplicationRecord
 
   # Real-time updates
   after_create_commit do
-    broadcast_refresh_to(project)
+    broadcast_refresh
   end
 
   after_update_commit do
     broadcast_refresh  # Refreshes the issue show page
-    broadcast_refresh_to(project, "issues")  # Refreshes the project's issues index
+    broadcast_refresh_to("issues")  # Refreshes the issues index
   end
 
-  def self.group_event(event_payload, project)
+  def self.group_event(event_payload)
     fingerprint = generate_fingerprint(event_payload)
 
-    find_or_create_by(project: project, fingerprint: fingerprint) do |issue|
+    find_or_create_by(fingerprint: fingerprint) do |issue|
       issue.title = extract_title(event_payload)
       issue.exception_type = extract_exception_type(event_payload)
       issue.first_seen = Time.current