fix: install.sh — section GLOBAL : détection skills sans sous-dossier catégorie

Problème : .codex/skills/ha-log-investigator/SKILL.md n'a pas de niveau
catégorie contrairement à .claude/skills/infra/ha-log-investigator/SKILL.md.
Le parsing cat/skill était donc faux pour codex (cat=skill, skill="SKILL").

Fix :
- gen_global_section() détecte la profondeur via le nombre de / dans le chemin
- cat_name vide si skill directement sous skills/ (structure codex)
- find exclut les dossiers cachés (*.system*, etc.) via -not -path '*/.*'
- preview_script g: construit le chemin selon présence ou non de cat_name

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

install.sh

@@ -597,10 +597,21 @@ gen_global_section() {
         [[ -z "$base" ]] && continue
         while IFS= read -r skill_md; do
             rel="${skill_md#${base}/skills/}"
-            cat_name="${rel%%/*}"; rest="${rel#*/}"; skill_name="${rest%%/*}"
+            local path_part="${rel%/SKILL.md}"
+            local slashes="${path_part//[^\/]/}"
+            local cat_name skill_name display
+            if [[ "${#slashes}" -ge 1 ]]; then
+                cat_name="${path_part%%/*}"
+                skill_name="${path_part#*/}"
+                display="${cat_name}/${skill_name}"
+            else
+                cat_name=""
+                skill_name="$path_part"
+                display="$skill_name"
+            fi
             ver=$(grep "^version:" "$skill_md" 2>/dev/null | head -1 | awk '{print $2}')
-            global_lines+=("g:${agent}|${cat_name}|${skill_name}\t  ${GRV_GRAY}${cat_name}/${skill_name}${RESET}  ${GRV_GRAY}[${agent}]${RESET}  ${GRV_GRAY}v${ver:-?}${RESET}")
+            global_lines+=("g:${agent}|${cat_name}|${skill_name}\t  ${GRV_GRAY}${display}${RESET}  ${GRV_GRAY}[${agent}]${RESET}  ${GRV_GRAY}v${ver:-?}${RESET}")
-        done < <(find "${base}/skills" -name "SKILL.md" 2>/dev/null | sort)
+        done < <(find "${base}/skills" -name "SKILL.md" -not -path '*/.*' 2>/dev/null | sort)
     done
     if [[ ${#global_lines[@]} -eq 0 ]]; then
         printf "d:-\t${GRV_GRAY}  (aucun skill installé globalement)${RESET}\n"
@@ -664,7 +675,11 @@ elif [[ "$type" == "g" || ( "$type" == "d" && "$value" != "-" && "$value" != "se
         hermes)      base="$HOME/.hermes" ;;
         *) exit 0 ;;
     esac
+    if [[ -n "$cat_name" ]]; then
         skill_file="${base}/skills/${cat_name}/${skill_name}/SKILL.md"
+    else
+        skill_file="${base}/skills/${skill_name}/SKILL.md"
+    fi
     if [[ -f "$skill_file" ]]; then
         if command -v bat &>/dev/null; then
             bat --style=numbers,header --color=always --language=markdown "$skill_file"