fix: scope hooks to DevDesk's tmux and reload env per Claude launch (0.2.1)

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

tests/attach.bats

@@ -197,6 +197,20 @@ claude_args() {
     [ "$(jq -r '.sessions[] | select(.name=="alpha") | .context.model' <<<"$output")" = Opus ]
 }
 
+@test "hooks ignore Claude running in some other tmux server" {
+    start_server
+    other="$TMP/other.sock"
+    tmux -S "$other" new-session -d -s stranger 'sleep 60'
+    pane=$(tmux -S "$other" display -p -t =stranger '#{pane_id}')
+    echo '{"session_id":"nope","source":"startup"}' |
+        TMUX="$other,1,0" TMUX_PANE="$pane" "$REPO/libexec/devdesk-session-hook"
+    echo '{"model":{"display_name":"Opus"},"context_window":{}}' |
+        TMUX="$other,1,0" TMUX_PANE="$pane" "$REPO/libexec/devdesk-statusline" >/dev/null
+    tmux -S "$other" kill-server
+    [ ! -e "$DEVDESK_STATE_DIR/registry.json" ] || [ "$(jq -r '.sessions | has("stranger")' "$DEVDESK_STATE_DIR/registry.json")" = false ]
+    [ ! -e "$DEVDESK_STATE_DIR/context/stranger.json" ]
+}
+
 @test "web actions run through attach and answer with JSON" {
     start_server
     run devdesk attach --new web1 alpha