feat: set White/Black names in the Save dialog too

Mirrors the Export PGN dialog: Save now has White/Black fields (pre-filled,
placeholders blank) and writes the names back to headers + on-screen info, so a
saved game stores real player names instead of You/Opponent. Shared prefill/
write-back helpers between the two dialogs. Bump cache version.

src/chess_pressure/static/app.js

@@ -423,6 +423,21 @@
     return g ? g.name : null;
   }
 
+  // Player-name fields shared by the Save and Export dialogs. Pre-fill treats
+  // PGN placeholders ("?") as blank; write-back updates headers + on-screen info.
+  const cleanHeader = (v) => (v && v !== "?" && v !== "????.??.??" ? v : "");
+
+  function prefillPlayerInputs(whiteEl, blackEl) {
+    whiteEl.value = cleanHeader(gameData.headers.White);
+    blackEl.value = cleanHeader(gameData.headers.Black);
+  }
+
+  function applyPlayerInputs(whiteEl, blackEl) {
+    gameData.headers.White = whiteEl.value.trim() || "White";
+    gameData.headers.Black = blackEl.value.trim() || "Black";
+    updateGameInfo();
+  }
+
   // Promise-based in-app modal. Native prompt()/confirm() are unreliable here —
   // browsers suppress them when the page isn't the active tab — so all save/delete
   // prompts go through a real <dialog>. Resolves to true (OK) or false (cancel/Esc).
@@ -485,7 +500,10 @@
     const dlg = document.getElementById("save-dialog");
     const input = document.getElementById("save-name");
     const note = document.getElementById("save-note");
+    const whiteEl = document.getElementById("save-white");
+    const blackEl = document.getElementById("save-black");
     input.value = currentSavedName() || defaultGameName();
+    prefillPlayerInputs(whiteEl, blackEl);
 
     // Live "this overwrites" warning, so clicking Save IS the confirmation.
     const refreshNote = () => {
@@ -504,6 +522,8 @@
     const name = input.value.trim();
     if (!name) return;
 
+    applyPlayerInputs(whiteEl, blackEl);
+
     // Replace any same-named game (case-insensitive); also collapses old duplicates.
     const key = name.toLowerCase();
     const saved = getSavedGames().filter((g) => g.name.toLowerCase() !== key);
@@ -535,22 +555,16 @@
   async function exportPGN() {
     if (!gameData) return;
 
-    // Let the user set player names before download; pre-fill from headers,
-    // treating placeholders ("?") as blank. Names are written back so they show
-    // on screen and persist on Save too.
+    // Let the user set player names before download (shared with the Save dialog).
     const whiteEl = document.getElementById("pgn-white");
     const blackEl = document.getElementById("pgn-black");
-    const real = (v) => (v && v !== "?" && v !== "????.??.??" ? v : "");
-    whiteEl.value = real(gameData.headers.White);
-    blackEl.value = real(gameData.headers.Black);
+    prefillPlayerInputs(whiteEl, blackEl);
     setTimeout(() => { whiteEl.focus(); whiteEl.select(); }, 0);
 
     const ok = await openModal(document.getElementById("export-pgn-dialog"));
     if (!ok) return;
 
-    gameData.headers.White = whiteEl.value.trim() || "White";
-    gameData.headers.Black = blackEl.value.trim() || "Black";
-    updateGameInfo();
+    applyPlayerInputs(whiteEl, blackEl);
 
     const pgn = ChessPressure.toPgn(gameData.headers, gameData.moves);
     const slug = (defaultGameName() || "game")

src/chess_pressure/static/index.html

@@ -4,7 +4,7 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>Chess Pressure</title>
-  <link rel="stylesheet" href="/style.css?v=31">
+  <link rel="stylesheet" href="/style.css?v=32">
   <link rel="stylesheet" href="https://unpkg.com/@chrisoakman/chessboardjs@1.0.0/dist/chessboard-1.0.0.min.css">
   <link rel="manifest" href="/manifest.json">
 </head>
@@ -127,6 +127,8 @@
       <label>Name:
         <input type="text" id="save-name" autocomplete="off">
       </label>
+      <label>White: <input type="text" id="save-white" autocomplete="off" placeholder="White player"></label>
+      <label>Black: <input type="text" id="save-black" autocomplete="off" placeholder="Black player"></label>
       <p id="save-note" class="export-info" style="display:none">A saved game with this name already exists — saving will overwrite it.</p>
       <div class="dialog-buttons">
         <button type="button" data-ok>Save</button>
@@ -176,6 +178,6 @@
   <script src="/chess.min.js"></script>
   <script src="/gif.js"></script>
   <script src="/engine.js"></script>
-  <script src="/app.js?v=31"></script>
+  <script src="/app.js?v=32"></script>
 </body>
 </html>

src/chess_pressure/static/sw.js

@@ -7,7 +7,7 @@
  *
  * Bump CACHE on every deploy so clients pick up new assets.
  */
-const CACHE = "chess-pressure-v31";
+const CACHE = "chess-pressure-v32";
 
 // Same-origin app shell. Cached by canonical path; the fetch handler matches
 // with ignoreSearch so cache-busting query strings (?v=NN) still hit.