Fix kanban view - archived tickets should not appear

Tinker

Home Epics Fix kanban view - archived tickets should not appearEdit

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Description

## Problem
Archived tickets (especially epics) are still appearing on the kanban view. Once a ticket is archived, it should be filtered out from all main views.

## Expected Behavior
- Archived tickets should NOT appear on the kanban board
- Archived tickets should only be visible when explicitly filtering for them (e.g., "Include archived" toggle)
- The kanban should only show active, non-archived tickets by default

## Current Behavior
Archived epics like #34, #39, #46, #62, #92, #125 are visible on kanban even though they're completed/cancelled and should be archived.

## Files Likely Requiring Changes
- Kanban board view / controller (filter out `where(archived: false)`)
- Kanban JavaScript (filter archived tickets)
- Any API endpoints powering the kanban view

## Acceptance Criteria
1. Kanban board does not show archived tickets
2. Existing archived tickets are hidden from view
3. New archived tickets automatically disappear from kanban
4. Optional: Add "Include archived" toggle if users want to see historical tickets