feat(dashboard): merge lists button, drop STT test, add bot/log settings, barge-in

Dashboard changes requested by the user:
- Merge 화이트리스트/블랙리스트 into one "👤 유저 등록/관리" button (the modal
  already holds both lists).
- Remove the 음성 인식(STT) 테스트 section and its client JS.
- Add collapsible "⚙️ 봇 관련 설정" with a barge-in toggle: "유저 목소리 들을 때
  봇이 말하던 것 중지" (default on). Stored via /api/bot/settings; the bot reads
  it on its report round-trip and calls voicePlayer.stop() when an allowed user
  starts speaking (dave/bot.mjs).
- Add collapsible "🧹 로그 관련 설정" with a "잡음 로그 표시 안 함" toggle (default
  on, localStorage-backed): hides turns whose 들음 is (빈 결과) or 답변 is [잡음].
- Fix the fixed event/error log dock covering the bottom-most turn: syncDockPad()
  pads main by the dock height (on load, log render, toggle, resize).

BotControl gains a settings store; /api/bot/report now also returns settings.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

dave/bot.mjs

@@ -177,6 +177,7 @@ let currentGuildId = null, currentChannelId = null, currentChannelName = null;
 const speakingSet = new Set();   // userIds currently speaking (for participant list)
 const activeSubs = new Set();    // userIds with an in-flight receive subscription
 let listsByGuild = {};           // guildId -> {whitelistUsers, blacklistUsers, whitelistRoles, blacklistRoles}
+let botSettings = { bargeIn: true };  // behaviour toggles from the dashboard
 
 // Attach the bot's audio player (so it can speak) to a fresh connection.
 function setupPlayer(connection) {
@@ -201,6 +202,11 @@ function setupReceiver(connection) {
         return;
       }
     }
+    // Barge-in: the moment an allowed user speaks, stop the bot's current TTS
+    // so it doesn't talk over them (toggleable from the dashboard, default on).
+    if (botSettings.bargeIn !== false && voicePlayer) {
+      try { voicePlayer.stop(true); } catch {}
+    }
     activeSubs.add(userId);
     if (!perUser.has(userId)) perUser.set(userId, { opusPackets: 0, pcmFrames: 0 });
     const opusStream = receiver.subscribe(userId, {
@@ -314,6 +320,7 @@ async function reportLoop() {
     j = await r.json();
   } catch { return; }  // dashboard down: keep running, retry next tick
   if (j?.lists) listsByGuild = j.lists;   // latest whitelist/blacklist config
+  if (j?.settings) botSettings = j.settings;  // latest behaviour toggles
   for (const cmd of (j?.commands || [])) {
     try { await handleCommand(cmd); } catch (e) { log(`command ${cmd?.type} failed: ${e.message}`); }
   }