feat: add default map setting feature

Add ability to set a specific map as the default that opens on load:

- Add 'Open default map' option to onload behavior dropdown
- Implement saveAsDefaultMap() to store map as default in IndexedDB
- Implement clearDefaultMap() to remove default map setting
- Modify checkLoadParameters() to load default map when configured
- Add UI buttons in Save dialog for setting/clearing default map
- Update version to 1.108.12 and hash in index.html

Users can now:
1. Open any map they want as default
2. Go to Options > Onload behavior > Select "Open default map"
3. Save > Click "Set as default" button
4. The map will now open automatically every time

This sets the foundation for the planned time-based worldbuilding
and lore database features by ensuring users always start with
their primary world map.

index.html

@@ -1830,6 +1830,7 @@
               <td>
                 <select id="onloadBehavior" data-stored="onloadBehavior">
                   <option value="random" selected>Generate random map</option>
+                  <option value="default">Open default map</option>
                   <option value="lastSaved">Open last saved map</option>
                 </select>
               </td>
@@ -6087,6 +6088,15 @@
             browser
           </button>
         </div>
+        <div style="margin-top: 0.8em; padding-top: 0.8em; border-top: 1px solid #ccc">
+          <strong>Default map</strong>
+          <button onclick="saveAsDefaultMap()" data-tip="Set this map as the default that opens on load (requires 'Open default map' onload behavior)">
+            Set as default
+          </button>
+          <button onclick="clearDefaultMap()" data-tip="Clear the current default map setting">
+            Clear default
+          </button>
+        </div>
         <p>
           Maps are saved in <i>.map</i> format, that can be loaded back via the <i>Load</i> in menu. There is no way to
           restore the progress if file is lost. Please keep old save files on your machine or cloud storage as backups.
@@ -8118,7 +8128,7 @@
     <script src="modules/ui/style-presets.js?v=1.100.00"></script>
     <script src="modules/ui/general.js?v=1.100.00"></script>
     <script src="modules/ui/options.js?v=1.106.2"></script>
-    <script src="main.js?v=1.108.1"></script>
+    <script src="main.js?v=1.108.12">
 
     <script defer src="modules/ui/style.js?v=1.108.4"></script>
     <script defer src="modules/ui/editors.js?v=1.108.5"></script>
@@ -8163,7 +8173,7 @@
     <script defer src="modules/coa-renderer.js?v=1.99.00"></script>
     <script defer src="libs/rgbquant.min.js"></script>
     <script defer src="libs/jquery.ui.touch-punch.min.js"></script>
-    <script defer src="modules/io/save.js?v=1.107.4"></script>
+    <script defer src="modules/io/save.js?v=1.108.12">
     <script defer src="modules/io/load.js?v=1.108.0"></script>
     <script defer src="modules/io/cloud.js?v=1.106.0"></script>
     <script defer src="modules/io/export.js?v=1.108.11"></script>

main.js

@@ -291,6 +291,22 @@ async function checkLoadParameters() {
     return;
   }
 
+  // check if there is a default map saved to indexedDB
+  if (byId("onloadBehavior").value === "default") {
+    try {
+      const blob = await ldb.get("defaultMap");
+      if (blob) {
+        WARN && console.warn("Loading default map");
+        uploadMap(blob);
+        return;
+      } else {
+        WARN && console.warn("No default map set, generating random map");
+      }
+    } catch (error) {
+      ERROR && console.error(error);
+    }
+  }
+
   // check if there is a map saved to indexedDB
   if (byId("onloadBehavior").value === "lastSaved") {
     try {

modules/io/save.js

@@ -167,6 +167,32 @@ async function saveToStorage(mapData, showTip = false) {
   showTip && tip("Map is saved to the browser storage", false, "success");
 }
 
+// save current map as the default map
+async function saveAsDefaultMap() {
+  if (customization) return tip("Map cannot be saved in EDIT mode, please complete the edit and retry", false, "error");
+
+  try {
+    const mapData = prepareMapData();
+    const blob = new Blob([mapData], {type: "text/plain"});
+    await ldb.set("defaultMap", blob);
+    tip("Map is set as default and will open on load", true, "success", 5000);
+  } catch (error) {
+    ERROR && console.error(error);
+    tip("Failed to set default map", true, "error", 3000);
+  }
+}
+
+// clear the default map setting
+async function clearDefaultMap() {
+  try {
+    await ldb.set("defaultMap", null);
+    tip("Default map cleared", false, "success", 2000);
+  } catch (error) {
+    ERROR && console.error(error);
+    tip("Failed to clear default map", false, "error", 2000);
+  }
+}
+
 // download map file
 function saveToMachine(mapData, filename) {
   const blob = new Blob([mapData], {type: "text/plain"});

versioning.js

@@ -13,7 +13,7 @@
  * Example: 1.102.2 -> Major version 1, Minor version 102, Patch version 2
  */
 
-const VERSION = "1.108.11";
+const VERSION = "1.108.12";
 if (parseMapVersion(VERSION) !== VERSION) alert("versioning.js: Invalid format or parsing function");
 
 {