Remove assumption of 50GB quota, defer to web console

Cannot reliably determine total cloud storage quota via CLI.
Removed hardcoded 50GB assumption since plans vary.

Now shows:
- Available: 30.96 GB (accurate from acrocmd)
- Used: (Check web console for accurate usage)

This is the safest approach since:
- Total quota not exposed via acrocmd or config files
- acrocmd list licenses fails for cloud-managed agents
- Web console always has accurate real-time usage data

modules/backup/acronis-agent-status.sh

@@ -215,27 +215,14 @@ if command -v acrocmd >/dev/null 2>&1; then
         vault_occupied=$(echo "$vault_info" | awk '{print $6, $7}')
 
         echo -e "  Vault:        ${vault_name}"
-
-        # Calculate total quota (assumes 50GB plan, can be adjusted)
-        # If occupied shows 0 but we have "available", total = 50GB and used = 50 - available
-        if [ "$vault_occupied" = "0 GB" ] && [ -n "$vault_free_val" ]; then
-            # Assume 50GB total quota (Acronis personal plan default)
-            total_quota=50
-
-            # Calculate used: total - available
-            available_gb=$(echo "$vault_free_val" | sed 's/[^0-9.]//g')
-            used_gb=$(echo "$total_quota - $available_gb" | bc 2>/dev/null)
-
-            if [ -n "$used_gb" ] && [ "$used_gb" != "0" ]; then
-                echo -e "  Used:         ~${used_gb} GB (${total_quota}GB - ${available_gb}GB available)"
-            else
-                echo -e "  Used:         ${vault_occupied}"
-            fi
-        else
-            echo -e "  Used:         ${vault_occupied}"
-        fi
-
         echo -e "  Available:    ${vault_free_val} ${vault_free_unit}"
+
+        # Show occupied if available, otherwise note it's not synced
+        if [ "$vault_occupied" != "0 GB" ]; then
+            echo -e "  Used:         ${vault_occupied}"
+        else
+            echo -e "  Used:         ${DIM}(Check web console for accurate usage)${NC}"
+        fi
     else
         echo -e "  ${YELLOW}⚠${NC} No vault information available"
         echo -e "  ${DIM}(Cloud storage visible after first backup)${NC}"