fix(ai): strip inline backticks wrapping generated commands

Benchmarking showed qwen2.5-coder commonly wraps its one-liner in a single pair
of backticks (`cmd`), which the triple-fence stripper missed. Strip a matching
leading+trailing backtick pair only, leaving inline command substitution intact.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

super-man.sh

@@ -335,10 +335,14 @@ ai_build_prompt() {
   esac
 }
 
-# Strip markdown fences and surrounding blank lines from a raw model response.
+# Strip markdown fences, surrounding blank lines, and a single pair of inline
+# backticks wrapping the whole line (coder models often emit `cmd`). Only a
+# matching leading+trailing pair is removed, so command substitution like
+# `date` inside a longer command is left untouched.
 ai_clean_response() {
   awk '/^[[:space:]]*```/ { next } { print }' \
     | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' \
+    | sed -E 's/^`(.*)`$/\1/' \
     | sed '/^$/d'
 }