feat: v0.8.1 answer sessions from the inbox: allow/deny, peek & reply

- PermissionRequest hook: the state file records tool, detail and
  description of a pending permission; Notification keeps it.
- devdesk attach --answer (presses 1/Esc only if the same wait is on and the
  prompt is visible), --peek (last exchange from the transcript), --reply
  (bracketed paste + Enter, streamed like uploads).
- Inbox: Allow/Deny/Open for permission waits; Peek & reply for other waits
  and finished sessions. Matrix messages include the command.

Closes #22
Closes #23

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

bin/devdesk

@@ -19,6 +19,8 @@ set -euo pipefail
 . "${DEVDESK_LIBEXEC:-/usr/lib/devdesk}/devdesk-lib.sh"
 # shellcheck source=libexec/devdesk-files.sh
 . "$DEVDESK_LIBEXEC/devdesk-files.sh"
+# shellcheck source=libexec/devdesk-inbox.sh
+. "$DEVDESK_LIBEXEC/devdesk-inbox.sh"
 
 usage() {
     sed -n '2,12s/^# \{0,1\}//p' "$0"
@@ -325,6 +327,20 @@ cmd_attach() {
         dd_linger
         return
         ;;
+    --peek)
+        shift
+        cmd_peek "$@"
+        dd_linger
+        return
+        ;;
+    --answer | --reply)
+        local action=${1#--}
+        shift
+        "cmd_$action" "$@"
+        ok_json
+        dd_linger
+        return
+        ;;
     --new | --rename | --end)
         local action=${1#--}
         shift