Agent Messages and DMs Not Appearing in Channel Feeds(Desktop and Mobile)

Summary:

Messages from agent and direct messages are not appearing in the main channel feed or DM section on either desktop or mobile clients. They only show in the Activity section. This is a systemic message routing and visibility issue affecting multiple message types and both platforms.

**Severity: HIGH** — This blocks basic functionality. Users cannot see agent responses or DMs in their intended locations.
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### Affected Components
- Channel message feed (desktop & mobile)
- DM section (desktop & mobile)
- Activity section (works correctly as workaround)
- Mobile image upload (secondary issue)

### Detailed Symptoms

**Agent Messages (Qwen-local, Fizz)**
- Desktop: Only visible in Activity section; completely missing from channel feed
- Mobile: Completely missing from all views except Activity section
- Expected: Should appear in main channel thread where posted

**Direct Messages**
- Desktop: No messages appear in DM section
- Mobile: No messages appear in DM section
- Workaround: Messages visible only in Activity section
- Expected: Should appear in dedicated DM section

**Image Uploads (Secondary Issue)**
- Mobile: Only allows 1 image per message
- Desktop: Allows multiple images
- Expected: Should allow multiple attachments on both platforms

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### Reproduction Steps

**For Agent Messages:**
1. Send a message from an agent (e.g., Qwen-local or Fizz response)
2. Check main channel feed on desktop
3. Check main channel feed on mobile
4. Observe: Messages only appear in Activity section

**For DMs:**
1. Open or send a direct message on desktop
2. Check DM section
3. Check on mobile app
4. Observe: No messages in DM section; only visible in Activity

**For Multiple Image Upload:**
1. Attempt to attach 2+ images on mobile
2. Observe: Only 1 image can be attached
3. Compare with desktop behavior

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### Environment
- Mobile: iPhone with Buzz iOS app
- Desktop: Mac mini with Buzz desktop app
- Relay: wss://quantumtesla.communities.buzz.xyz

**Timeline:** This is not new—it has never worked correctly.

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### Root Cause Analysis (Hypotheses)

This appears to be a **message routing/filtering issue**:

1. **Message kind filtering too aggressive** — Certain event kinds may be filtered out before reaching the feed layer
2. **Missing index/tag for visibility** — Agent messages may not be tagged properly for channel discovery
3. **Backend delivery issue** — DMs/messages not reaching the feed/DM layer from the relay
4. **Client-side filtering** — Mobile/desktop clients filtering certain message sources

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### What Works
- Activity section shows all responses on desktop
- Relay receives and stores messages
- Messages are being published to channel

### What Doesn't Work
- Channel feed rendering of agent messages
- DM section rendering
- Mobile rendering of non-"General" messages
- Multiple image attachment on mobile

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**Suggested Investigation Points:**
1. Check message event tags/kinds (agents vs. regular users)
2. Verify channel feed indexing includes all message types
3. Review DM section data source and filtering criteria
4. Check mobile app's message rendering logic
5. Verify relay event delivery is complete

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**Screenshots provided:** 3 images showing desktop activity section, mobile General section, and mobile channel view with missing messages.