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-plan.ps1

@@ -0,0 +1,31 @@
+# Long-poll hooks-approval for Stop (plan mode) decisions
+# Only activates when permission_mode is 'plan' and stop_hook_active is false
+# Returns Stop decision JSON per Claude Code docs:
+#   { "decision": "block", "reason": "..." } to continue implementing
+#   {} or empty to let Claude stop
+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] [PLAN] Hook fired for agent=$agent stdin_len=$($b.Length)"
+$j = $b | ConvertFrom-Json
+Add-Content $logFile "[$ts] [PLAN] permission_mode=$($j.permission_mode) stop_hook_active=$($j.stop_hook_active)"
+if ($j.permission_mode -ne 'plan' -or $j.stop_hook_active) {
+  Add-Content $logFile "[$ts] [PLAN] Skipping (not plan mode or stop_hook_active)"
+  exit 0
+}
+try {
+  Add-Content $logFile "[$ts] [PLAN] POSTing to backend..."
+  $r = Invoke-RestMethod -Uri 'http://localhost:4101/api/hooks-approval/plan' -Method POST -Body $b -ContentType 'application/json' -TimeoutSec 125
+  $ts2 = Get-Date -Format "HH:mm:ss.fff"
+  if ($r -and $r.decision) {
+    $out = $r | ConvertTo-Json -Depth 10 -Compress
+    Add-Content $logFile "[$ts2] [PLAN] Got response: $out"
+    $out
+  } else {
+    Add-Content $logFile "[$ts2] [PLAN] Empty/timeout response (no decision)"
+  }
+} catch {
+  $ts2 = Get-Date -Format "HH:mm:ss.fff"
+  Add-Content $logFile "[$ts2] [PLAN] ERROR: $($_.Exception.Message)"
+}