Bug Description

When a Slack message contains multiple file attachments, resolveSlackMedia() only returns the first successfully downloaded file instead of all files.

Location

/dist/slack/monitor/media.js (source: src/slack/monitor/media.ts)

Problem

The function loops through files but returns immediately after the first successful download:

for (const file of files) {
    // ... download logic ...
    return {  // <-- BUG: Returns after FIRST file
        path: saved.path,
        contentType: saved.contentType,
        placeholder: label ? \`[Slack file: ${label}]\` : "[Slack file]",
    };
}

Impact

When another bot (e.g., TommyBot) sends multiple PDFs in a single message, Clawdbot only receives and processes the first one. This broke a workflow where invoice PDFs were being sent for processing.

Suggested Fix

Change the function to:

1. Collect all successfully downloaded files into an array
2. Return all files (requires updating the return type/interface)
3. Update callers to handle multiple files

Reproduction

1. Have another bot send a Slack message with 3+ file attachments
2. Observe that Clawdbot only receives/processes the first file