PreToolUse hook permissionDecision: "ask" auto-approved by TUI since v1.0.53 #3590

Describe the bug

When a PreToolUse hook returns permissionDecision: "ask", the TUI permission dialog flashes on screen for milliseconds and is immediately auto-approved without user interaction. The hook fires correctly, the permission.requested event is emitted with kind=hook, but the prompt is resolved as "approved" before the user can interact with it.

This is a regression introduced in v1.0.53 and persists in v1.0.56. Version 1.0.52 works correctly — the permission dialog stays visible and waits for user input.

Additionally, since v1.0.53, selection highlight colors and user question background colors in the TUI appear broken (likely same root cause — a TUI rendering change).

Affected version

• Broken: 1.0.53, 1.0.54, 1.0.55, 1.0.56 (all tested, all broken)
• • Working: 1.0.52 (prompts stay visible and wait for user interaction)

Steps to reproduce the behavior

Steps to reproduce

1. Create a minimal hook (e.g. ~/.copilot/hooks/hooks.json):

{
  "hooks": {
    "PreToolUse": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "python3 -c \"import json,sys; d=json.load(sys.stdin); print(json.dumps({'permissionDecision':'ask','permissionDecisionReason':'Testing hook prompt'}) if d.get('toolName')=='bash' else json.dumps({}))\"",
            "timeout": 5
          }
        ]
      }
    ]
  }
}

2. Start a new session:

COPILOT_AUTO_UPDATE=false copilot

3. Ask the agent to run any shell command:

ls -l ~/

4. Observe: The permission dialog flashes on screen for ~50 ms and disappears. The command executes immediately without user approval.

Expected behavior

The permission dialog should remain visible and wait for the user to select "Yes" or "No" before proceeding — exactly as it does on v1.0.52.

Additional context

Evidence from events.jsonl

Timing from a v1.0.56 session shows the prompt is resolved in 79ms:

permission.requested  → timestamp T
permission.completed  → timestamp T + 79ms   (result: "approved")

For comparison, in a session created under v1.0.51 , the same hook waits 3–5 seconds for user interaction:

permission.requested  → timestamp T
permission.completed  → timestamp T + 4200ms  (result: "approved" after user clicks Yes)

Key observation

Sessions created under v1.0.52 or earlier continue to show prompts correctly, even when the binary has been auto-updated to v1.0.56. This suggests the regression is in the TUI session initialization or component mounting code, not in the hook execution pipeline itself.
### Additional context

• Tested with both global hooks (~/.copilot/hooks/hooks.json) and plugin hooks — same behavior
• The hook itself executes correctly — stdout returns valid JSON with permissionDecision: "ask"
• The permission.requested event shows kind=hook and resolvedByHook=N/A (correct)
• Non-hook permission prompts (e.g., native trust prompts for new directories) are NOT affected — they still wait for user input

Environment

• OS: Linux (Ubuntu)
• Terminal: Standard terminal (no tmux)
• Shell: bash