# Implementation Plan: Manual Block/Unblock Control (manual_block_control_20260306)

## Phase 1: Block Mechanism
- [ ] Task: Initialize MMA Environment
- [ ] Task: Add manual block field
    - WHERE: src/models.py
    - WHAT: Add manual_block_reason to Ticket
    - HOW: Optional[str]
- [ ] Task: Add block/unblock methods
    - WHERE: src/models.py
    - WHAT: mark_blocked, mark_unblocked
    - HOW: Set/unset flag

## Phase 2: UI Controls
- [ ] Task: Add block button
    - WHERE: src/gui_2.py
    - WHAT: Block selected ticket
    - HOW: Button with input
- [ ] Task: Add unblock button
    - WHERE: src/gui_2.py
    - WHAT: Remove block
    - HOW: Button

## Phase 3: Visualization
- [ ] Task: Show block status
    - WHERE: src/gui_2.py
    - WHAT: Visual indicator for blocked
    - HOW: Different color/icon

## Phase 4: Verification
- [ ] Test block/unblock
- [ ] Conductor - Phase Verification