Resolve tickets 058, 062-066: frontend UI fixes

- 058: poll loop now refetches param declarations so auto-declared
  params appear live without a page reload
- 062: browser tab title says "ottyl" instead of "webapp"
- 063: declared params list omits the redundant capture-group suffix
  when it matches the param name
- 064: dashboard autosave no longer clobbers in-flight PromQL edits;
  reconciliation is guarded against edits made after the save request
  was sent
- 065: filter bar placeholder/help icons lead with filter-bar syntax
  instead of regex
- 066: filter bar surfaces the active time-range preset/sort order and
  resyncs its draft when the value prop changes externally

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A1ZJ3SrayzLzVndhVq9BmS

webapp/index.html

@@ -4,7 +4,7 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>webapp</title>
+    <title>ottyl</title>
   </head>
   <body>
     <div id="root"></div>