reclaim existing deprecated feature flag

app/finders/conversation_finder.rb

@@ -187,13 +187,10 @@ class ConversationFinder
   end
 
   def set_count_for_all_conversations
-    # Check if filtering by status only (no other filters applied)
-    filtering_by_status_only = FILTER_PARAMS.none? { |key| params[key] }
-
-    # Use cache only for admins (non-admins have inbox permission filters applied)
+    # Use cache only for admins with no filters other than status
     use_cache = current_account.feature_enabled?(:counter_cache_optimization) &&
                 @is_admin &&
-                filtering_by_status_only &&
+                FILTER_PARAMS.none? { |key| params[key] } &&
                 params[:status] != 'all'
 
     all_count = if use_cache

config/features.yml

@@ -17,10 +17,10 @@
   display_name: Facebook Channel
   enabled: true
   help_url: https://chwt.app/hc/fb
-- name: channel_twitter
-  display_name: Twitter Channel
-  enabled: true
-  deprecated: true
+- name: counter_cache_optimization
+  display_name: Counter Cache Optimization
+  enabled: false
+  chatwoot_internal: true
 - name: ip_lookup
   display_name: IP Lookup
   enabled: false
@@ -243,7 +243,3 @@
   display_name: Advanced Assignment
   enabled: false
   premium: true
-- name: counter_cache_optimization
-  display_name: Counter Cache Optimization
-  enabled: false
-  chatwoot_internal: true

db/migrate/20260226125101_disable_counter_cache_optimization_for_existing_accounts.rb

@@ -0,0 +1,10 @@
+# counter_cache_optimization reclaims the deprecated channel_twitter bit (position 4).
+# channel_twitter was enabled: true, so all existing accounts have bit 4 set to 1.
+# counter_cache_optimization is enabled: false, so we must clear bit 4 for all accounts.
+class DisableCounterCacheOptimizationForExistingAccounts < ActiveRecord::Migration[7.0]
+  def up
+    Account.find_in_batches(batch_size: 100) do |accounts|
+      accounts.each { |account| account.disable_features!(:counter_cache_optimization) }
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2026_02_26_084618) do
+ActiveRecord::Schema[7.1].define(version: 2026_02_26_125101) do
   # These extensions should be enabled to support this database
   enable_extension "pg_stat_statements"
   enable_extension "pg_trgm"