feat: v0.9.0 conversation search, plan usage meters, quiet phone at the desk

- devdesk attach --search (grep + jq over ~/.claude/projects, six files at
  a time) and --resume-convo NAME ID [fork]; devdesk-claude-run passes
  --fork-session once. Search dialog with Resume / Fork / Open.
- statusLine snapshots rate_limits and pr; footer/menu meters with a 90 %
  warning; PR chip on session rows.
- CLAUDE_CLIENT_PRESENCE_FILE per tmux session id; --presence on|off with a
  self-expiring marker; the page heartbeats it while visible.

Closes #24
Closes #25
Closes #26

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

bin/devdesk

@@ -21,6 +21,8 @@ set -euo pipefail
 . "$DEVDESK_LIBEXEC/devdesk-files.sh"
 # shellcheck source=libexec/devdesk-inbox.sh
 . "$DEVDESK_LIBEXEC/devdesk-inbox.sh"
+# shellcheck source=libexec/devdesk-history.sh
+. "$DEVDESK_LIBEXEC/devdesk-history.sh"
 
 usage() {
     sed -n '2,12s/^# \{0,1\}//p' "$0"
@@ -328,9 +330,18 @@ cmd_attach() {
         dd_linger
         return
         ;;
-    --peek)
+    --peek | --search)
+        local action=${1#--}
         shift
-        cmd_peek "$@"
+        "cmd_$action" "$@"
+        dd_linger
+        return
+        ;;
+    --resume-convo | --presence)
+        local action=${1#--}
+        shift
+        "cmd_${action//-/_}" "$@"
+        ok_json
         dd_linger
         return
         ;;