Slash command args not displayed in message view

[DrumRobot]

Description

When a slash command with parameters (e.g., /skill-name topic) is displayed in the web session viewer, only the command name is shown — the args/parameters are dropped.

Root Cause

In packages/web/src/lib/components/MessageItem.svelte (line ~296), the slash command rendering only displays commandData.name:

<span class="font-semibold text-gh-accent">{commandData.name || 'Command'}</span>

The commandData.args field (parsed from <command-args> XML tags) is available but never rendered.

Expected Behavior

• /skill-name topic should display as: /skill-name topic
• Similar to how CommandTitle.svelte renders commands with args in accent + secondary colors

Fix Suggestion

Add args display after the command name in the slash command block:

<span class="font-semibold text-gh-accent">{commandData.name || 'Command'}</span>
{#if commandData.args}
  <span class="text-gh-text-secondary ml-1">{commandData.args}</span>
{/if}

Affected Files

• packages/web/src/lib/components/MessageItem.svelte (line ~289-302)

Storybook

• Add/update Storybook story for MessageItem covering slash command display with and without args

Related

• CommandTitle.svelte already handles this correctly for session list display
• parseCommandMessage() in packages/core/src/utils.ts correctly extracts args