diff --git a/AGENTS.md b/AGENTS.md
index de8047d..5f4992b 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -3,3 +3,5 @@
 - Nach jeder Änderung am Proxy (server.py) oder an den Requests (app.js) muss der Proxy neu gestartet werden: erst alten Prozess killen (`Get-Process -Name python | Stop-Process -Force`), dann unsichtbar starten.
 - Commits und Push erfolgen nur durch expliziten Befehl des Nutzers.
 - Der Server (server.py) wird immer unsichtbar gestartet: `Start-Process -NoNewWindow -FilePath "python" -ArgumentList "server.py"`
+- **LESS-Workflow**: CSS-Quelldatei ist `style.less`. Bei Serverstart wird automatisch `style.css` via `node build-less.js` kompiliert. Bei manuellen Änderungen an `style.less`: `node build-less.js` ausführen, dann Server neustarten.
+- `style.css` ist auto-generiert – keine manuellen Änderungen dort vornehmen.
diff --git a/README.md b/README.md
index ec4c347..63baebe 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ Live-Überwachung von Lara Kiesewetters Partien bei der **ODJM (Offene Deutsche
 
 ## Projektstruktur
 
-```
+```text
 ├── app.js              # Hauptlogik (Brett, UI, Auto-Refresh)
 ├── index.html          # HTML-Grundgerüst
 ├── style.css           # Dark-Theme-Styling
@@ -42,7 +42,7 @@ Live-Überwachung von Lara Kiesewetters Partien bei der **ODJM (Offene Deutsche
    Der Server läuft auf `http://localhost:8111`.
 
 2. **Öffne die App im Browser:**
-   ```
+   ```text
    http://localhost:8111
    ```
    (Der Server serviert auch die statischen Dateien.)
diff --git a/app.js b/app.js
index 6258cbd..ae73105 100644
--- a/app.js
+++ b/app.js
@@ -3,14 +3,12 @@
  * Haupt-Application
  */
 
-const PLAYER_NAME = 'Kiesewetter, Lara';
+/* global $, parsePGN, filterLaraGames, getLiveGame, getLatestGame, Chess, Chessboard */
 
 let board = null;
 let chess = null;
 let currentGame = null;
 let allLaraGames = [];
-let serverLastFetch = null;
-let laraColor = null;
 let currentMoveIndex = -1;
 let userSelectedGame = false;
 let userScrolledMoves = false;
@@ -89,14 +87,13 @@ function updateBoard() {
     // Spiegele das Brett, wenn Lara Schwarz hat
     const laraIsBlack = currentGame.black.toLowerCase().includes('kiesewetter');
     const orientation = laraIsBlack ? 'black' : 'white';
-    laraColor = laraIsBlack ? 'b' : 'w';
     
     // Führe alle Züge aus
     const nonResultMoves = currentGame.moves.filter(m => !m.isResult);
     for (const move of nonResultMoves) {
         try {
             chess.move(move.san);
-        } catch (e) {
+        } catch {
             // Ignoriere ungültige Züge
         }
     }
@@ -108,7 +105,7 @@ function updateBoard() {
         for (let i = 0; i <= currentMoveIndex && i < nonResultMoves.length; i++) {
             try {
                 chess.move(nonResultMoves[i].san);
-            } catch (e) {
+            } catch {
                 break;
             }
         }
@@ -153,7 +150,7 @@ function goToMove(index) {
     for (let i = 0; i <= index; i++) {
         try {
             chess.move(nonResultMoves[i].san);
-        } catch (err) {
+        } catch {
             break;
         }
     }
@@ -265,21 +262,19 @@ function highlightActivePlayer() {
  * Highlight den letzten Zug auf dem Brett
  */
 function highlightLastMove() {
-    if (!board || !chess) return;
+    if (!board || !chess || !currentGame) return;
+    
+    $('#board [data-square]').removeClass('last-move-highlight');
     
     const nonResultMoves = currentGame.moves.filter(m => !m.isResult);
     
     if (currentMoveIndex >= 0 && currentMoveIndex < nonResultMoves.length) {
-        const lastMove = nonResultMoves[currentMoveIndex];
-        
-        // Parse die SAN-Züge, um Start- und Zielfelder zu finden
         const moves = chess.history({ verbose: true });
         if (moves.length > 0) {
             const lastMoveData = moves[moves.length - 1];
-            board.highlightSquare(lastMoveData.from, lastMoveData.to);
+            $(`#board [data-square="${lastMoveData.from}"]`).addClass('last-move-highlight');
+            $(`#board [data-square="${lastMoveData.to}"]`).addClass('last-move-highlight');
         }
-    } else {
-        board.clearHighlights();
     }
 }
 
@@ -501,12 +496,11 @@ async function updateStandings() {
                         <span class="standings-value">${data.losses}</span>
                     </div>
                 `;
-                serverLastFetch = Date.now();
                 return;
             }
         }
         document.getElementById('standings-content').innerHTML = '<div class="standings-loading">Daten nicht verfügbar</div>';
-    } catch (err) {
+    } catch {
         document.getElementById('standings-content').innerHTML = '<div class="standings-loading">Daten nicht verfügbar</div>';
     }
 }
@@ -564,11 +558,6 @@ function showLoading(show) {
     document.getElementById('loading-overlay').style.display = show ? 'flex' : 'none';
 }
 
-function showError(msg) {
-    document.getElementById('error-message').textContent = msg;
-    document.getElementById('error-overlay').style.display = 'flex';
-}
-
 function hideError() {
     document.getElementById('error-overlay').style.display = 'none';
 }
@@ -609,8 +598,6 @@ document.getElementById('copy-pgn-btn').addEventListener('click', async () => {
 document.addEventListener('keydown', (e) => {
     if (!currentGame) return;
     
-    const nonResultMoves = currentGame.moves.filter(m => !m.isResult);
-    
     if (e.key === 'ArrowLeft') {
         e.preventDefault();
         goToMove(currentMoveIndex - 1);
diff --git a/build-less.js b/build-less.js
index 467e1b1..21d4aae 100644
--- a/build-less.js
+++ b/build-less.js
@@ -1,3 +1,4 @@
+/* global require, __dirname, process */
 const less = require('less');
 const fs = require('fs');
 const path = require('path');
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 3cce36a..667eb79 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -7,7 +7,7 @@ import { defineConfig } from "eslint/config";
 
 export default defineConfig([
   { files: ["**/*.{js,mjs,cjs}"], plugins: { js }, extends: ["js/recommended"], languageOptions: { globals: globals.browser } },
-  { files: ["**/*.json"], plugins: { json }, language: "json/json", extends: ["json/recommended"] },
+  { files: ["**/*.json"], ignores: ["package-lock.json"], plugins: { json }, language: "json/json", extends: ["json/recommended"] },
   { files: ["**/*.md"], plugins: { markdown }, language: "markdown/commonmark", extends: ["markdown/recommended"] },
-  { files: ["**/*.css"], plugins: { css }, language: "css/css", extends: ["css/recommended"] },
+  { files: ["**/*.css"], plugins: { css }, language: "css/css", extends: ["css/recommended"], rules: { "css/use-baseline": "off" } },
 ]);
diff --git a/pgn-parser.js b/pgn-parser.js
index e02b315..8641993 100644
--- a/pgn-parser.js
+++ b/pgn-parser.js
@@ -130,3 +130,8 @@ function getLatestGame(laraGames) {
     });
     return sorted[0];
 }
+
+window.parsePGN = parsePGN;
+window.filterLaraGames = filterLaraGames;
+window.getLiveGame = getLiveGame;
+window.getLatestGame = getLatestGame;
diff --git a/style.css b/style.css
index 11cea79..27e49e1 100644
--- a/style.css
+++ b/style.css
@@ -130,6 +130,9 @@ header h1 {
   width: 100%;
   max-width: 500px;
 }
+#board [data-square].last-move-highlight {
+  box-shadow: inset 0 0 3px 3px rgba(255, 200, 0, 0.7);
+}
 #pgn-panel {
   width: 100%;
   max-width: 500px;
@@ -172,6 +175,7 @@ header h1 {
   padding: 8px;
   background: rgba(0, 0, 0, 0.4);
   border-radius: 6px;
+  -webkit-user-select: text;
   user-select: text;
 }
 /* Info Section */
diff --git a/style.less b/style.less
index 0923b8f..6895b30 100644
--- a/style.less
+++ b/style.less
@@ -157,6 +157,10 @@ header {
 #board {
     width: 100%;
     max-width: 500px;
+
+    [data-square].last-move-highlight {
+        box-shadow: inset 0 0 3px 3px rgba(255, 200, 0, 0.7);
+    }
 }
 
 #pgn-panel {
@@ -205,6 +209,7 @@ header {
     padding: 8px;
     background: @bg-darker;
     border-radius: 6px;
+    -webkit-user-select: text;
     user-select: text;
 }