chore: Remove unused MC_INACTIVE_HOURS config variable

This variable was defined but never used in the code.
Contact cleanup threshold is controlled directly in the UI.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.env.example

@@ -25,11 +25,9 @@ MC_CONFIG_DIR=./data/meshcore
 # Application Settings
 # ============================================
 
-# Hours of inactivity before contacts can be cleaned up
-MC_INACTIVE_HOURS=48
-
 # Note: Auto-refresh is now intelligent and checks for new messages every 10 seconds
 # No configuration needed - the system automatically updates UI only when new messages arrive
+# Contact cleanup threshold is set directly in the UI (default: 48 hours)
 
 # ============================================
 # Archive Configuration

app/config.py

@@ -21,9 +21,6 @@ class Config:
     # MeshCore Bridge configuration
     MC_BRIDGE_URL = os.getenv('MC_BRIDGE_URL', 'http://meshcore-bridge:5001/cli')
 
-    # Application settings
-    MC_INACTIVE_HOURS = int(os.getenv('MC_INACTIVE_HOURS', '48'))
-
     # Archive configuration
     MC_ARCHIVE_DIR = os.getenv('MC_ARCHIVE_DIR', '/root/.archive/meshcore')
     MC_ARCHIVE_ENABLED = os.getenv('MC_ARCHIVE_ENABLED', 'true').lower() == 'true'

docker-compose.yml

@@ -45,7 +45,6 @@ services:
       - MC_BRIDGE_URL=http://meshcore-bridge:5001/cli
       - MC_DEVICE_NAME=${MC_DEVICE_NAME}
       - MC_CONFIG_DIR=/root/.config/meshcore
-      - MC_INACTIVE_HOURS=${MC_INACTIVE_HOURS:-48}
       - MC_ARCHIVE_DIR=/root/.archive/meshcore
       - MC_ARCHIVE_ENABLED=${MC_ARCHIVE_ENABLED:-true}
       - MC_ARCHIVE_RETENTION_DAYS=${MC_ARCHIVE_RETENTION_DAYS:-7}