feat(cli): expand remote player, opaque play id, tray without libindicator

Add CLI commands for stop, shuffle, repeat, mute, star, rating, reload,
server list/switch, and Subsonic search; publish extra snapshot fields and
server/search JSON for tooling. Single `play <id>` resolves track, album,
or artist; artists play a shuffled full discography.

Guard Linux tray creation with catch_unwind when Ayatana/AppIndicator .so
is missing. Harden bash completion against zsh sourcing (compopt). Narrow
AudioEngine field visibility to silence private_interfaces warnings.

completions/_psysonic

@@ -39,6 +39,25 @@ _psysonic_library_folder_ids() {
   (( $#ids )) && compadd -a ids
 }
 
+_psysonic_snapshot_json() {
+  local f
+  if [[ -n $XDG_RUNTIME_DIR ]]; then
+    f="$XDG_RUNTIME_DIR/psysonic-cli-snapshot.json"
+    [[ -r $f ]] && { print -r -- "$f"; return }
+  fi
+  f="${TMPDIR:-/tmp}/psysonic-cli-snapshot.json"
+  [[ -r $f ]] && print -r -- "$f"
+}
+
+_psysonic_server_ids() {
+  command -v jq &>/dev/null || return
+  local jf
+  jf="$(_psysonic_snapshot_json)" || return
+  local -a ids
+  ids=( ${(@f)"$(jq -r '.servers[]? | select(.id != null) | .id | tostring' "$jf" 2>/dev/null)"} )
+  (( $#ids )) && compadd -a ids
+}
+
 _psysonic_globals() {
   compadd -J options -X 'option' -- \
     --help --version --info --json --quiet --player completions
@@ -68,7 +87,8 @@ fi
 integer n=${#sub[@]}
 if (( n == 0 )); then
   compadd -J verbs -X 'player command' -- \
-    next prev play pause seek volume audio-device library mix
+    next prev play pause stop seek volume shuffle repeat mute unmute star unstar rating reload \
+    audio-device library server search mix
   return
 fi
 
@@ -92,10 +112,33 @@ case ${sub[1]} in
   mix)
     (( n == 1 )) && compadd append new
     ;;
+  server)
+    if (( n == 1 )); then
+      compadd list set
+    elif [[ ${sub[2]} == set ]] && (( n == 2 )); then
+      _psysonic_server_ids
+    fi
+    ;;
+  search)
+    if (( n == 1 )); then
+      compadd track album artist
+    elif (( n >= 2 )); then
+      _message -e descriptions 'search query'
+    fi
+    ;;
+  repeat)
+    (( n == 1 )) && compadd off all one
+    ;;
+  rating)
+    (( n == 1 )) && compadd 0 1 2 3 4 5
+    ;;
   seek)
     (( n == 1 )) && _message -e descriptions 'integer delta (seconds, e.g. -5)'
     ;;
   volume)
     (( n == 1 )) && _message -e descriptions 'percent 0–100'
     ;;
+  play)
+    (( n == 1 )) && _message -e descriptions 'Subsonic id (song, album, or artist)'
+    ;;
 esac