Update js/utils.js with strategy engine and conflict resolutions

js/utils.js

@@ -193,6 +193,45 @@ function spellf(n) {
     return parts.join(' ') || 'zero';
 }
 
+// === EXPORT / IMPORT ===
+function exportSave() {
+    const raw = localStorage.getItem('the-beacon-v2');
+    if (!raw) { 
+        showToast('No save data to export.', 'info');
+        return; 
+    }
+    navigator.clipboard.writeText(raw).then(() => {
+        showToast('Save data copied to clipboard.', 'info');
+    }).catch(() => {
+        // Fallback: select in a temporary textarea
+        const ta = document.createElement('textarea');
+        ta.value = raw;
+        document.body.appendChild(ta);
+        ta.select();
+        document.execCommand('copy');
+        document.body.removeChild(ta);
+        showToast('Save data copied to clipboard (fallback).', 'info');
+    });
+}
+
+function importSave() {
+    const input = prompt('Paste save data:');
+    if (!input || !input.trim()) return;
+    try {
+        const data = JSON.parse(input.trim());
+        // Validate: must have expected keys
+        if (typeof data.code !== 'number' || typeof data.phase !== 'number') {
+            showToast('Invalid save data: missing required fields.', 'event');
+            return;
+        }
+        localStorage.setItem('the-beacon-v2', input.trim());
+        showToast('Save data imported — reloading', 'info');
+        setTimeout(() => location.reload(), 800);
+    } catch (e) {
+        showToast('Invalid save data: not valid JSON.', 'event');
+    }
+}
+
 function getBuildingCost(id) {
     const def = BDEF.find(b => b.id === id);
     if (!def) return {};