feat: Add transcript-debug page with multi-agent support, hooks approval, and message selection

- Transcript debug: JSONL viewer, parsed chat view, realtime WebSocket updates, session selector
- Multi-agent: ejecutor, nucleo000, and claude (global ~/.claude/projects/) with agent switcher
- Hooks approval: permission/plan request forwarding via PowerShell hooks, long-poll API, UI modals
- Chat features: session ID copy, select mode with checkboxes, multi-select copy, select all/deselect all
- File watchers for all agent transcript directories with polling fallback on Windows

hooks/approval-permission.ps1

@@ -0,0 +1,29 @@
+# Long-poll hooks-approval for PermissionRequest decisions
+# Reads hook stdin, POSTs to backend, waits up to 125s for UI response
+# Returns hookSpecificOutput JSON per Claude Code PermissionRequest docs
+param([string]$agent = "ejecutor")
+$logFile = "$PSScriptRoot/../.claude-$agent/debug/hooks.log"
+$ts = Get-Date -Format "HH:mm:ss.fff"
+$b = [Console]::In.ReadToEnd()
+Add-Content $logFile "[$ts] [PERM] Hook fired for agent=$agent stdin_len=$($b.Length)"
+try {
+  $j = $b | ConvertFrom-Json
+  Add-Content $logFile "[$ts] [PERM] tool=$($j.tool_name) session=$($j.session_id)"
+} catch {
+  Add-Content $logFile "[$ts] [PERM] WARN: stdin not valid JSON"
+}
+try {
+  Add-Content $logFile "[$ts] [PERM] POSTing to backend..."
+  $r = Invoke-RestMethod -Uri 'http://localhost:4101/api/hooks-approval/permission' -Method POST -Body $b -ContentType 'application/json' -TimeoutSec 125
+  $ts2 = Get-Date -Format "HH:mm:ss.fff"
+  if ($r -and $r.hookSpecificOutput) {
+    $out = $r | ConvertTo-Json -Depth 10 -Compress
+    Add-Content $logFile "[$ts2] [PERM] Got response: $out"
+    $out
+  } else {
+    Add-Content $logFile "[$ts2] [PERM] Empty/timeout response (no hookSpecificOutput)"
+  }
+} catch {
+  $ts2 = Get-Date -Format "HH:mm:ss.fff"
+  Add-Content $logFile "[$ts2] [PERM] ERROR: $($_.Exception.Message)"
+}