Add individual kill button for hopper tasks

[warmonger0]

Description

Add a kill/cancel button for each individual task in the hopper queue panel. Users should be able to cancel specific queued tasks without having to clear the entire hopper.

Requirements

1. Add a kill/cancel button (❌ or 🗑️ icon) next to each hopper task
2. When clicked, remove that specific task from the phase_queue
3. Update the UI immediately to reflect the removal
4. Show confirmation toast/notification
5. Ensure proper error handling if deletion fails

Implementation Details

• Frontend: Add button to each hopper task row in QueuePanel
• Backend: Ensure DELETE /api/v1/queue/{queue_id} endpoint exists
• Database: Remove record from phase_queue table
• WebSocket: Broadcast update to all connected clients

UI/UX

• Button should be small and unobtrusive (icon only)
• Show confirmation dialog for safety (optional, but recommended)
• Disable button during deletion to prevent double-clicks
• Show success/error feedback

Priority

Medium - Quality of life improvement for hopper management

adw_sdlc_complete_iso

[warmonger0]

[ADW-AGENTS] 🤖 ADW Webhook: Detected adw_sdlc_complete_iso workflow request

Starting workflow with ID: 730f0cbf
Workflow: adw_sdlc_complete_iso 🏗️
Model Set: base ⚙️
Reason: New issue with adw_sdlc_complete_iso workflow

Logs will be available at: agents/730f0cbf/adw_sdlc_complete_iso/