Make iloom-hook.js bidirectional for permission responses

[acreeger]

Description

Currently iloom-hook.js is fire-and-forget (broadcast only). To enable cross-loom permission approval from iloom-vscode, we need bidirectional communication.

Current Behavior

• Hook receives event from Claude Code
• Broadcasts to all /tmp/iloom-*.sock sockets
• Closes connection immediately

New Behavior for PermissionRequest

When ILOOM_BIDIRECTIONAL_HOOK=1 is set:

1. Hook receives PermissionRequest event
2. Connects to socket and sends event
3. Keeps socket open, waits for response
4. Receives {"decision": "allow"} or {"decision": "deny"}
5. Returns decision to Claude Code via stdout

When flag is NOT set:

• Existing fire-and-forget behavior (backwards compatible)

Changes Required

templates/hooks/iloom-hook.js:

• Check for ILOOM_BIDIRECTIONAL_HOOK env var
• For PermissionRequest events + flag set: keep socket open, wait for response
• Return decision to Claude Code

src/utils/claude.ts (launchClaude):

• Set ILOOM_BIDIRECTIONAL_HOOK=1 env var when launching Claude

ClaudeHookManager.ts:

• Set timeout to 86400 seconds for PermissionRequest hook

Companion Issue

iloom-vscode: iloom-ai/iloom-vscode#66