fix: replace print() with typer.secho/echo for styled terminal output

Use typer.secho with colors for warning/error/success messages and
typer.echo for normal output, matching the project's existing pattern
in cli.py. This ensures task feedback is visible and styled correctly
in busy terminals.

Addresses review feedback on TruFoundation#53.

Author: Ziang Zhang

trushell/commands/tasks.py

@@ -2,6 +2,8 @@
 
 from typing import Callable
 
+import typer
+
 from trushell.core.database import complete_todo, delete_todo, get_all_todos, insert_todo, update_todo
 from trushell.core.models import Todo
 
@@ -14,7 +16,7 @@ def add_task(args: str) -> None:
         addtask task text here
     """
     if not args.strip():
-        print("Usage: task add <task> [category]")
+        typer.secho('⚠️ Missing arguments. Syntax: addtask "task-name" "category"', fg=typer.colors.YELLOW)
         return
 
     # Try to parse quoted arguments: "task text" "category"
@@ -33,54 +35,54 @@ def add_task(args: str) -> None:
 
     todo = Todo(task=task_text, category=category)
     insert_todo(todo)
-    print("Task added.")
+    typer.secho("✅ Task added.", fg=typer.colors.GREEN)
 
 
 def show_tasks(_: str) -> None:
     """Display the current todo list."""
     tasks = get_all_todos()
     if not tasks:
-        print("No tasks found.")
+        typer.echo("No tasks found.")
         return
 
     for index, task in enumerate(tasks, start=1):
         status = "✅" if task.status == 2 else "❌"
-        print(f"{index}. {task.task} [{task.category}] {status}")
+        typer.echo(f"{index}. {task.task} [{task.category}] {status}")
 
 
 def complete_task(args: str) -> None:
     """Mark a todo item as complete."""
     if not args.strip() or not args.strip().isdigit():
-        print("Usage: task done <task-number>")
+        typer.secho("⚠️ Usage: task done <task-number>", fg=typer.colors.YELLOW)
         return
 
     index = int(args.strip()) - 1
     try:
         complete_todo(index)
-        print("Task completed.")
+        typer.secho("✅ Task completed.", fg=typer.colors.GREEN)
     except Exception as error:
-        print(f"Task error: {error}")
+        typer.secho(f"❌ Task error: {error}", fg=typer.colors.RED)
 
 
 def remove_task(args: str) -> None:
     """Remove a task by its numeric position."""
     if not args.strip() or not args.strip().isdigit():
-        print("Usage: task remove <task-number>")
+        typer.secho("⚠️ Usage: task remove <task-number>", fg=typer.colors.YELLOW)
         return
 
     index = int(args.strip()) - 1
     try:
         delete_todo(index)
-        print("Task removed.")
+        typer.secho("✅ Task removed.", fg=typer.colors.GREEN)
     except Exception as error:
-        print(f"Task error: {error}")
+        typer.secho(f"❌ Task error: {error}", fg=typer.colors.RED)
 
 
 def update_task(args: str) -> None:
     """Update an existing task's text and/or category."""
     parts = args.split(maxsplit=2)
     if len(parts) < 2 or not parts[0].isdigit():
-        print('Usage: task update <task-number> "<task>" ["<category>"]')
+        typer.secho('⚠️ Usage: task update <task-number> "<task>" ["<category>"]', fg=typer.colors.YELLOW)
         return
 
     index = int(parts[0]) - 1
@@ -89,9 +91,9 @@ def update_task(args: str) -> None:
 
     try:
         update_todo(index, task_text, category)
-        print("Task updated.")
+        typer.secho("✅ Task updated.", fg=typer.colors.GREEN)
     except Exception as error:
-        print(f"Task error: {error}")
+        typer.secho(f"❌ Task error: {error}", fg=typer.colors.RED)
 
 
 def list_tasks(_: str) -> None:
@@ -112,7 +114,7 @@ def run_task_command(args: str) -> None:
     }
 
     if not args.strip():
-        print("Usage: task <add|show|done|list|remove|update> [options]")
+        typer.secho("⚠️ Usage: task <add|show|done|list|remove|update> [options]", fg=typer.colors.YELLOW)
         return
 
     parts = args.split(maxsplit=1)
@@ -124,6 +126,6 @@ def run_task_command(args: str) -> None:
         try:
             handler(subargs)
         except Exception as error:
-            print(f"Task error: {error}")
+            typer.secho(f"❌ Task error: {error}", fg=typer.colors.RED)
     else:
-        print(f"Unknown task subcommand: {subcmd}")
+        typer.secho(f"❓ Unknown task subcommand: {subcmd}", fg=typer.colors.YELLOW)