improve: always prompt for network and storage in quick mode

addresses #352

quick mode now:
- shows available network bridges and prompts for selection
- shows available storage pools with usage info and prompts for selection
- properly handles cases where defaults (vmbr0, local-lvm) don't exist
- gives clear error messages when no bridges or storage pools are found

this ensures users always see what's available and can make informed choices
even in quick mode, preventing installation failures due to missing defaults

install.sh

@@ -346,21 +346,51 @@ create_lxc_container() {
         safe_read "Startup order [99]: " startup
         startup=${startup:-99}
     else
-        # Quick mode - use defaults
-        # But if no valid bridge exists, we must ask the user
+        # Quick mode - but still need to verify critical settings
+        
+        # Network bridge selection
+        echo
+        if [[ -n "$BRIDGES" ]]; then
+            echo "Available network bridges: $BRIDGES"
+        else
+            echo "No network bridges detected"
+        fi
+        
+        # Always ask if default doesn't exist or no bridges found
         if [[ "$DEFAULT_BRIDGE" == "vmbr0" && -n "$BRIDGES" && ! "$BRIDGES" =~ vmbr0 ]]; then
-            echo
-            print_info "No default bridge found. Available bridges: $BRIDGES"
-            safe_read "Please select a network bridge: " bridge
-        elif [[ "$DEFAULT_BRIDGE" == "vmbr0" && -z "$BRIDGES" ]]; then
-            echo
+            print_info "Default bridge vmbr0 not found"
+            safe_read "Select network bridge: " bridge
+        elif [[ -z "$BRIDGES" ]]; then
             print_error "No network bridges detected on this system"
             print_info "You may need to create a bridge first (e.g., vmbr0)"
             safe_read "Enter network bridge name to use: " bridge
         else
-            bridge=$DEFAULT_BRIDGE
+            safe_read "Network bridge [$DEFAULT_BRIDGE]: " bridge
+            bridge=${bridge:-$DEFAULT_BRIDGE}
         fi
-        storage=$DEFAULT_STORAGE
+        
+        # Storage selection
+        echo
+        if [[ -n "$STORAGE_INFO" ]]; then
+            echo "Available storage pools:"
+            echo "$STORAGE_INFO" | awk '{printf "  %-15s %-8s %5s used\n", $1, $2, $6}'
+        else
+            echo "No storage pools detected"
+        fi
+        
+        # Always ask if default doesn't exist
+        local STORAGE_LIST=$(echo "$STORAGE_INFO" | awk '{print $1}' | paste -sd',' -)
+        if [[ "$DEFAULT_STORAGE" == "local-lvm" && -n "$STORAGE_LIST" && ! "$STORAGE_LIST" =~ local-lvm ]]; then
+            print_info "Default storage local-lvm not found"
+            safe_read "Select storage pool: " storage
+        elif [[ -z "$STORAGE_INFO" ]]; then
+            print_error "No storage pools detected"
+            safe_read "Enter storage pool name to use: " storage
+        else
+            safe_read "Storage [$DEFAULT_STORAGE]: " storage
+            storage=${storage:-$DEFAULT_STORAGE}
+        fi
+        
         static_ip=""
         nameserver=""
         startup=99