Fix Bash not showing 'Waiting for input' when approval needed (#33)

[kosinal]

Summary

• Register PermissionRequest and PostToolUse hook events to accurately detect when a tool needs user approval vs. is auto-approved
• PermissionRequest sets status to "waiting" (fires only when permission dialog is shown), PostToolUse resets to "running" (fires after tool completes)
• Fixes Not showing running after bash prompt submitted #33 without the false-positive regression from the previous approach of adding Bash to INTERACTIVE_TOOLS

Test plan

• Run npm test — all 96 tests pass including 6 new tests
• Run npm run lint — no errors
• Start dashboard, trigger a Bash command needing approval → dashboard shows "Waiting for input"
• Auto-approved Bash command → dashboard stays "Running"
• Interactive tools (Write, Edit, AskUserQuestion) still show "Waiting for input"