Expand patient and activity pages to full width

Switches patient show and log pages to use full-width layout
to better accommodate the eligible programmes table component.

The eligible programmes component (added in 95a175e) displays a
3-column table that requires more horizontal space to prevent text
wrapping. Design team confirmed full-width layout is appropriate
for these patient-focused pages.

Author: jhenderson

app/controllers/patients_controller.rb

@@ -7,12 +7,12 @@ class PatientsController < ApplicationController
   before_action :set_patient, except: :index
   before_action :record_access_log_entry, only: %i[show log]
 
+  layout "full"
+
   def index
     patients = @form.apply(policy_scope(Patient).includes(:school))
 
     @pagy, @patients = pagy(patients)
-
-    render layout: "full"
   end
 
   def show
@@ -27,7 +27,6 @@ def log
   end
 
   def edit
-    render layout: "full"
   end
 
   def invite_to_clinic