Cleanup: parallel fetching, error recovery, dead code removal

- Fetch .tex files in parallel with Promise.all instead of sequentially
- Clear cached IndexedDB promise on rejection so subsequent calls retry
- Remove unused textureOrder array from Act1State parser
- Unify selectDefault/applyCustom into single applyTexture function
- Remove redundant squareTexture call on already-squared wdbTexture

src/core/formats/SaveGameParser.js

@@ -325,19 +325,18 @@ export class SaveGameParser {
 
         // Conditional textures based on which planes have names
         const textures = new Map();
-        const textureOrder = [];
 
         if (planes[3].nameLength > 0) {
-            for (let i = 0; i < 3; i++) textureOrder.push(this.readAct1Texture(textures));
+            for (let i = 0; i < 3; i++) this.readAct1Texture(textures);
         }
         if (planes[4].nameLength > 0) {
-            for (let i = 0; i < 2; i++) textureOrder.push(this.readAct1Texture(textures));
+            for (let i = 0; i < 2; i++) this.readAct1Texture(textures);
         }
         if (planes[5].nameLength > 0) {
-            textureOrder.push(this.readAct1Texture(textures));
+            this.readAct1Texture(textures);
         }
         if (planes[6].nameLength > 0) {
-            for (let i = 0; i < 3; i++) textureOrder.push(this.readAct1Texture(textures));
+            for (let i = 0; i < 3; i++) this.readAct1Texture(textures);
         }
 
         // Final fields
@@ -347,7 +346,6 @@ export class SaveGameParser {
         this.parsed.act1State = {
             planes,
             textures,
-            textureOrder,
             startOffset,
             endOffset: this.reader.tell(),
             cptClickDialogueNextIndex,

src/core/savegame/textureStorage.js

@@ -21,6 +21,9 @@ function openDB() {
 
         request.onsuccess = () => resolve(request.result);
         request.onerror = () => reject(request.error);
+    }).catch((err) => {
+        dbPromise = null;
+        throw err;
     });
 
     return dbPromise;

src/lib/save-editor/TexturePickerModal.svelte

@@ -70,13 +70,13 @@
         return canvas.toDataURL();
     }
 
-    function selectDefault(tex) {
+    function applyTexture(tex) {
         onSelect({
             width: tex.width,
             height: tex.height,
             palette: tex.palette,
             pixels: tex.pixels,
-            paletteSize: tex.palette.length
+            paletteSize: tex.paletteSize || tex.palette.length
         });
     }
 
@@ -86,14 +86,7 @@
 
     function applyCustom() {
         const tex = customTextures.find(t => t.id === selectedCustomId);
-        if (!tex) return;
-        onSelect({
-            width: tex.width,
-            height: tex.height,
-            palette: tex.palette,
-            pixels: tex.pixels,
-            paletteSize: tex.paletteSize
-        });
+        if (tex) applyTexture(tex);
     }
 
     function handleUploadClick() {
@@ -194,7 +187,7 @@
                             <button
                                 type="button"
                                 class="texture-thumb"
-                                onclick={() => selectDefault(tex)}
+                                onclick={() => applyTexture(tex)}
                                 title={tex.name}
                             >
                                 <img src={tex.dataUrl} alt={tex.name} />

src/lib/save-editor/VehicleEditor.svelte

@@ -223,19 +223,19 @@
     }
 
     async function preloadDefaultTextures(info) {
-        const loaded = [];
-        for (const texFile of info.texFiles) {
+        const results = await Promise.all(info.texFiles.map(async (texFile) => {
             const response = await fetch(`/${texFile}.tex`);
-            if (!response.ok) continue;
+            if (!response.ok) return null;
             const buffer = await response.arrayBuffer();
             const parsed = parseTex(buffer);
             if (parsed.textures.length > 0) {
-                loaded.push({ name: texFile, ...parsed.textures[0] });
-            }
+                return { name: texFile, ...parsed.textures[0] };
             }
+            return null;
+        }));
         // Only apply if textureInfo hasn't changed since we started
         if (textureInfo === info) {
-            preloadedDefaults = loaded;
+            preloadedDefaults = results.filter(Boolean);
         }
     }
 
@@ -275,16 +275,16 @@
             }
         };
 
-        // Reset texture to WDB default (equivalent to WriteDefaultTexture in the game)
+        // Reset texture to WDB default (equivalent to WriteDefaultTexture in the game).
+        // wdbTexture is already squared when cached in loadCurrentPart().
         if (canEditTexture && wdbTexture && renderer) {
             const texKey = textureInfo.textureName.toLowerCase();
-            const saveData = squareTexture(wdbTexture);
 
-            renderer.updateTexture(texKey, saveData);
+            renderer.updateTexture(texKey, wdbTexture);
 
             update.texture = {
                 textureName: textureInfo.textureName,
-                textureData: saveData
+                textureData: wdbTexture
             };
         }