Fix: celle senza colore nel generatore e persistenza stato gioco in localStorage

game.js

@@ -155,6 +155,30 @@
       if (!expanded) break;
     }
 
+    // Fallback: colora eventuali celle rimaste scoperte (-1)
+    // Assegna il colore di una cella adiacente già colorata
+    if (totalFilled < totalCells) {
+      for (let r = 0; r < size; r++) {
+        for (let c = 0; c < size; c++) {
+          if (grid[r][c] === -1) {
+            // Cerca una cella adiacente colorata
+            const dirs = [[0,1],[0,-1],[1,0],[-1,0]];
+            for (const [dr, dc] of dirs) {
+              const nr = r + dr, nc = c + dc;
+              if (nr >= 0 && nr < size && nc >= 0 && nc < size && grid[nr][nc] !== -1) {
+                grid[r][c] = grid[nr][nc];
+                break;
+              }
+            }
+            // Se ancora -1, assegna un colore casuale
+            if (grid[r][c] === -1) {
+              grid[r][c] = colorOrder[Math.floor(Math.random() * colorCount)];
+            }
+          }
+        }
+      }
+    }
+
     return grid;
   }
 
@@ -180,7 +204,76 @@
 
   // --- Game Logic ---
 
+  const STORAGE_KEY_STATE = 'catdoku_game_state';
+
+  function saveGameState() {
+    const stateToSave = {
+      size: state.size,
+      grid: state.grid,
+      solution: state.solution,
+      errors: state.errors,
+      catsPlaced: state.catsPlaced,
+      totalCats: state.totalCats,
+      level: state.level,
+      score: state.score,
+      hints: state.hints,
+      gameOver: state.gameOver,
+      won: state.won,
+      playerName: state.playerName,
+      levelStartTime: state.levelStartTime,
+      levelTime: state.levelTime
+    };
+    localStorage.setItem(STORAGE_KEY_STATE, JSON.stringify(stateToSave));
+  }
+
+  function loadGameState() {
+    const saved = localStorage.getItem(STORAGE_KEY_STATE);
+    if (!saved) return null;
+    try {
+      return JSON.parse(saved);
+    } catch (e) {
+      return null;
+    }
+  }
+
+  function clearGameState() {
+    localStorage.removeItem(STORAGE_KEY_STATE);
+  }
+
   function initGame() {
+    // Prima prova a caricare stato salvato
+    const savedState = loadGameState();
+
+    if (savedState && !savedState.gameOver && !savedState.won) {
+      // Ripristina stato salvato
+      state.size = savedState.size;
+      state.grid = savedState.grid;
+      state.solution = savedState.solution;
+      state.errors = savedState.errors;
+      state.catsPlaced = savedState.catsPlaced;
+      state.totalCats = savedState.totalCats;
+      state.level = savedState.level;
+      state.score = savedState.score;
+      state.hints = savedState.hints;
+      state.gameOver = savedState.gameOver;
+      state.won = savedState.won;
+      state.playerName = savedState.playerName;
+      state.levelStartTime = savedState.levelStartTime;
+      state.levelTime = savedState.levelTime;
+
+      // Ripristina UI
+      if (playerNameDisplay) {
+        playerNameDisplay.textContent = state.playerName;
+      }
+      updateUI();
+      renderGrid();
+      hideModal();
+      hideNameInput();
+      startTimer();
+      return;
+    }
+
+    // Nuova partita
     const size = parseInt(gridSizeSelect.value);
     state.size = size;
     state.errors = state.maxErrors;
@@ -310,6 +403,7 @@
       state.catsPlaced--;
       renderGrid();
       updateUI();
+      saveGameState();
       return;
     }
 
@@ -318,9 +412,11 @@
       state.errors--;
       flashError(row, col);
       updateUI();
+      saveGameState();
 
       if (state.errors <= 0) {
         state.gameOver = true;
+        clearGameState();
         showModal('Game Over!', 'Hai esaurito tutti i tentativi. Riprova!', 'Ricomincia', () => {
           initGame();
         });
@@ -332,6 +428,7 @@
     state.catsPlaced++;
     renderGrid();
     updateUI();
+    saveGameState();
 
     // Check win
     if (state.catsPlaced === state.totalCats) {
@@ -339,6 +436,7 @@
       stopTimer();
       state.score += state.errors * 10 + state.hints * 5;
       saveLevelRecord();
+      clearGameState();
       state.level++;
       showModal('Vittoria!',
         `Hai completato il livello ${state.level - 1}!\nTempo: ${formatTime(state.levelTime)}\nPunteggio: ${state.score}`,