fix: use temp file for message to avoid shell parsing issues

The message passed to opencode run contains newlines and special
characters (parentheses, etc.) which break shell parsing when passed
directly in double quotes.

Fix by writing message to temp file and using '@msg_file' syntax
to pass to opencode run. This handles any characters in the message.

skills/kugetsu/scripts/kugetsu-session.sh

@@ -83,6 +83,10 @@ EOF
     if [ -n "$existing_base" ] && [ "$existing_base" != "null" ]; then
         if [ "$force" = true ]; then
             echo "Warning: Reinitializing sessions (force mode)" >&2
+            echo "Destroying all sessions, worktrees, and logs..." >&2
+            cmd_destroy --base -y 2>/dev/null || true
+            cmd_destroy --pm-agent -y 2>/dev/null || true
+            rm -f "$LOGS_DIR"/*.log 2>/dev/null || true
         else
             echo "Error: Base session already exists: $existing_base" >&2
             echo "Use --force to reinitialize" >&2
@@ -221,7 +225,10 @@ cmd_delegate() {
         exit 1
     fi
     
-    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '$message' --session '$new_session'" >> "$log_file" 2>&1 &
+    local msg_file="$LOGS_DIR/msg-$new_session.txt"
+    printf '%s' "$message" > "$msg_file"
+    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '@$msg_file' --session '$new_session'" >> "$log_file" 2>&1 &
+    rm -f "$msg_file"
     echo "Delegated to new session (logged to $(basename "$log_file"))"
 }
 
@@ -369,7 +376,10 @@ cmd_start() {
     load_agent_env "dev"
     
     cd "$worktree_path"
-    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '$dev_message' --session '$new_session_id'" >> "$LOGS_DIR/dev-$new_session_id.log" 2>&1 &
+    local msg_file="$LOGS_DIR/msg-$new_session_id.txt"
+    printf '%s' "$dev_message" > "$msg_file"
+    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '@$msg_file' --session '$new_session_id'" >> "$LOGS_DIR/dev-$new_session_id.log" 2>&1 &
+    rm -f "$msg_file"
     
     echo "Session started for '$issue_ref': $new_session_id"
     echo "Worktree: $worktree_path"
@@ -419,12 +429,12 @@ cmd_continue() {
     local issue_ref=$(python3 -c "import json; print(json.load(open('$session_path')).get('issue_ref', ''))" 2>/dev/null || echo "")
     
     if [ -z "$worktree_path" ] || [ ! -d "$worktree_path" ]; then
-        echo "Error: Worktree is missing for '$session_name'" >&2
-        echo "Removing stale session file..." >&2
+        echo "Warning: Worktree is missing for '$session_name'. Recovering..." >&2
         rm -f "$session_path"
         remove_issue_from_index "$session_name"
-        echo "Use 'kugetsu start $session_name' to create a new session." >&2
-        exit 1
+        echo "Calling cmd_start to create new session and worktree..." >&2
+        cmd_start "$session_name" "$message"
+        return $?
     fi
     
     if [ -z "$message" ]; then
@@ -432,7 +442,10 @@ cmd_continue() {
     fi
     
     cd "$worktree_path"
-    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '$message' --session '$opencode_session_id'" >> "$LOGS_DIR/dev-$opencode_session_id.log" 2>&1 &
+    local msg_file="$LOGS_DIR/msg-$opencode_session_id.txt"
+    printf '%s' "$message" > "$msg_file"
+    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '@$msg_file' --session '$opencode_session_id'" >> "$LOGS_DIR/dev-$opencode_session_id.log" 2>&1 &
+    rm -f "$msg_file"
 }
 
 cmd_list() {