webui: automation settings panel, set-location, responsive layout

- Automation tab: settings form (define_settings) beside the editor,
  stacking above it when narrow; script/settings save split.
- Set location modal: current location + reset checkbox.
- saveScriptSettings/setSavePath API wiring; plugins panel.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/data.js

@@ -430,6 +430,20 @@ export const db = {
   rssRules,
   searchPlugins,
   runSearch,
+  script: {
+    loaded: true,
+    path: 'examples/anime_sort.lua',
+    source: `function on_file_complete(event)
+  naut.move_file(event.torrent_id, event.index, event.path .. ".sorted")
+end
+`,
+    queued: 12,
+    handled: 12,
+    dropped: 0,
+    errors: 0,
+    move_requests: 3,
+    last_error: '',
+  },
   // server preferences (subset, advanced)
   preferences: {
     dl_limit: 0,