fix(cli): ensure history.txt exists before interactive mode

Interactive mode now creates the .taskflow directory and history.txt
file proactively using mkdir(parents=True) and touch(exist_ok=True).
This prevents FileNotFoundError when the directory doesn't exist.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: mjunaidca

packages/cli/src/taskflow/commands/interactive.py

@@ -68,14 +68,19 @@ def interactive() -> None:
     # Set up history file in .taskflow directory
     try:
         storage = get_storage()
-        history_file = storage.taskflow_dir / "history.txt"
+        taskflow_dir = storage.taskflow_dir
     except Exception:
         # Fallback if storage not initialized - use current directory
         from taskflow.config import get_taskflow_dir
 
         taskflow_dir = get_taskflow_dir()
-        taskflow_dir.mkdir(exist_ok=True)
-        history_file = taskflow_dir / "history.txt"
+
+    # Ensure directory exists and create history file path
+    taskflow_dir.mkdir(parents=True, exist_ok=True)
+    history_file = taskflow_dir / "history.txt"
+
+    # Touch the history file to ensure it exists
+    history_file.touch(exist_ok=True)
 
     # Create session with history
     session: PromptSession = PromptSession(history=FileHistory(str(history_file)))