* feat: implement Monitor tool for streaming shell output
Add the Monitor tool that executes shell commands in the background and
streams stdout line-by-line as notifications to the model. This enables
real-time monitoring of logs, builds, and long-running processes.
Implementation:
- MonitorTool (src/tools/MonitorTool/) — spawns LocalShellTask with
kind='monitor', returns immediately with task ID
- MonitorMcpTask (src/tasks/MonitorMcpTask/) — task lifecycle management
and agent cleanup via killMonitorMcpTasksForAgent()
- MonitorPermissionRequest — permission dialog component
The codebase already had all integration points wired (tools.ts, tasks.ts,
PermissionRequest.tsx, LocalShellTask kind='monitor', BashTool prompt).
This PR provides the missing implementations.
* fix: command-specific permission rule + architecture docs
- MonitorPermissionRequest: "don't ask again" now creates a
command-prefix rule (like BashTool) instead of a blanket
tool-name-only rule that would auto-allow all Monitor commands
- MonitorMcpTask: clarify architecture comments explaining why
monitor_mcp type exists as a registry stub while actual tasks
are local_bash with kind='monitor'
* fix: address Copilot review feedback
- Fix permission rule field: expression → ruleContent (Copilot #1)
- Handle empty command prefix: skip rule creation (Copilot #2)
- Remove unused useTheme() import (Copilot #3)
- Save permission rules under 'Bash' toolName so bashToolHasPermission
can match them — Monitor delegates to Bash permission system (Copilot #4)
- Remove unused logError import from MonitorMcpTask (Copilot #6)
- Copilot #5 (getAppState throws): same pattern as BashTool:915, not a bug
b818dd5958