update zsh config

config/shell/.config/zsh/conf.d/60-fetch.zsh

@@ -1,6 +1,6 @@
-# Detect logo capability
+# Detect logo capability.
 
-if [[ -z "$uy_fetch_logo_type" ]]; then
+_uy_fetch_probe() {
     if (( $+commands[kgp-query] )) && kgp-query 2>/dev/null; then
         uy_fetch_logo_type=kitty
     elif (( $+commands[sixel-query] )) && sixel-query 2>/dev/null; then
@@ -10,8 +10,31 @@ if [[ -z "$uy_fetch_logo_type" ]]; then
     else
         uy_fetch_logo_type=auto
     fi
+}
+
+if [[ -z "$uy_fetch_logo_type" ]]; then
+    if [[ -t 0 ]] && (( $+commands[kgp-query] || $+commands[sixel-query] )); then
+        _uy_fetch_cache_dir="${XDG_CACHE_HOME:-$HOME/.cache}/zsh/logo-type"
+        # Terminal identity, sanitised down to a single path component
+        _uy_fetch_cache_file="$_uy_fetch_cache_dir/${${TERM:-none}//[^A-Za-z0-9._-]/_}@${${TERM_PROGRAM:-none}//[^A-Za-z0-9._-]/_}"
+
+        [[ -s "$_uy_fetch_cache_file" ]] && uy_fetch_logo_type="$(<"$_uy_fetch_cache_file")"
+
+        # Covers both a cache miss and a cache file holding anything unexpected
+        if [[ "$uy_fetch_logo_type" != (kitty|sixel|logo|symbols|auto) ]]; then
+            _uy_fetch_probe
+            [[ -d "$_uy_fetch_cache_dir" ]] || mkdir -p "$_uy_fetch_cache_dir"
+            print -r -- "$uy_fetch_logo_type" >| "$_uy_fetch_cache_file"
+        fi
+
+        unset _uy_fetch_cache_dir _uy_fetch_cache_file
+    else
+        _uy_fetch_probe
+    fi
 fi
 
+unfunction _uy_fetch_probe
+
 : ${uy_fetch_color:="38;2;137;180;250"}
 
 # Build fastfetch args (arrays to handle paths with spaces safely)