fix: session ID collision in cmd_start by excluding pm_agent_session_id

When cmd_start forks a new session, the session detection logic now
excludes both base_session_id AND pm_agent_session_id to prevent
forked sessions from being misidentified as the pm-agent session.

This addresses issue #81 where forked sessions were showing the same
session ID as the pm-agent.

skills/kugetsu/scripts/kugetsu

@@ -15,33 +15,6 @@ if [ -f "$KUGETSU_DIR/config" ]; then
     source "$KUGETSU_DIR/config"
 fi
 
-extract_issue_ref_from_message() {
-    local message="$1"
-    
-    if [ -z "$message" ]; then
-        echo ""
-        return
-    fi
-    
-    if [[ "$message" =~ ^([a-zA-Z0-9.-]+/[a-zA-Z0-9._-]+/[a-zA-Z0-9._-]+#[0-9]+) ]]; then
-        echo "${BASH_REMATCH[1]}"
-        return
-    fi
-    
-    if [[ "$message" =~ (https?://[a-zA-Z0-9.-]+/[a-zA-Z0-9._-]+/[a-zA-Z0-9._-]+/(issues|pull)/[0-9]+) ]]; then
-        local url="${BASH_REMATCH[1]}"
-        local path=$(echo "$url" | sed 's|https\?://||' | cut -d'/' -f2-)
-        local instance=$(echo "$path" | cut -d'/' -f1)
-        local owner=$(echo "$path" | cut -d'/' -f2)
-        local repo=$(echo "$path" | cut -d'/' -f3)
-        local num=$(echo "$path" | grep -oE '[0-9]+$')
-        echo "${instance}/${owner}/${repo}#${num}"
-        return
-    fi
-    
-    echo ""
-}
-
 count_active_dev_sessions() {
     local count=0
     if [ -d "$SESSIONS_DIR" ]; then
@@ -542,13 +515,6 @@ cmd_delegate() {
         exit 1
     fi
     
-    local issue_ref=$(extract_issue_ref_from_message "$message")
-    
-    if [ -n "$issue_ref" ] && [[ "$issue_ref" =~ \#[0-9]+$ ]]; then
-        cmd_start "$issue_ref" "$message"
-        return
-    fi
-    
     local pm_session=$(get_pm_agent_session_id)
     if [ -z "$pm_session" ] || [ "$pm_session" = "null" ] || [ "$pm_session" = "None" ]; then
         echo "Error: PM agent session not found. Run 'kugetsu init' first." >&2
@@ -557,7 +523,7 @@ cmd_delegate() {
     
     mkdir -p "$LOGS_DIR"
     local log_file="$LOGS_DIR/delegate-$(date +%s).log"
-    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '$message' --continue --session '$pm_session' >> '$log_file' 2>&1" > /dev/null 2>&1 &
+    nohup sh -c "opencode run '$message' --continue --session '$pm_session' >> '$log_file' 2>&1" > /dev/null 2>&1 &
     disown
     echo "Delegated to PM agent (logged to $(basename "$log_file"))"
 }