fix(install): correct root-path routing, display counter, and duplicate trap

Fix get_install_path misrouting root-level config files (env.example,
README.md) into INSTALL_DIR instead of project root. Fix custom install
display counter resetting per category. Remove duplicate INT/TERM trap.

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

install.sh

@@ -65,7 +65,7 @@ INSTALL_DIR="${OPENCODE_INSTALL_DIR:-.opencode}"  # Allow override via environme
 TEMP_DIR="/tmp/opencode-installer-$$"
 
 # Cleanup temp directory on exit (success or failure)
-trap 'rm -rf "$TEMP_DIR" 2>/dev/null || true' EXIT INT TERM
+trap 'rm -rf "$TEMP_DIR" 2>/dev/null || true' EXIT
 
 # Global variables
 SELECTED_COMPONENTS=()
@@ -351,8 +351,12 @@ get_install_path() {
     local registry_path=$1
     # Strip leading .opencode/ if present
     local relative_path="${registry_path#.opencode/}"
-    # Return INSTALL_DIR + relative path
-    echo "${INSTALL_DIR}/${relative_path}"
+    # If path didn't start with .opencode/, it's a root-relative path (e.g. env.example, README.md)
+    if [ "$relative_path" = "$registry_path" ]; then
+        echo "./${registry_path}"
+    else
+        echo "${INSTALL_DIR}/${relative_path}"
+    fi
 }
 
 expand_context_wildcard() {
@@ -794,15 +798,14 @@ show_component_selection() {
     local all_components=()
     local component_details=()
     
+    local idx=1
     for category in "${categories[@]}"; do
         local cat_display
         cat_display=$(echo "$category" | awk '{print toupper(substr($0,1,1)) tolower(substr($0,2))}')
         echo -e "${CYAN}${BOLD}${cat_display}:${NC}"
-        
+
         local components
         components=$(jq_exec ".components.${category}[]? | .id" "$TEMP_DIR/registry.json")
-        
-        local idx=1
         while IFS= read -r comp_id; do
             local comp_name
             comp_name=$(jq_exec ".components.${category}[]? | select(.id == \"${comp_id}\") | .name" "$TEMP_DIR/registry.json")