refactor(emex): rewrite EMEX integration, add category fallback

Replace browser-based Puppeteer scraper with standalone scraper wrapper.
Add EMEX as fallback source for categories when PL24 is unavailable.
Update vehicle decoding to use new synchronous EMEX API.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/components/schema/schema-viewer.tsx

@@ -111,16 +111,18 @@ export function SchemaViewer({
                 <img
                   src={schemaPic.url}
                   alt={schemaPic.label || "Sema goruntusu"}
-                  width={schemaPic.width}
-                  height={schemaPic.height}
+                  {...(schemaPic.width > 0 && { width: schemaPic.width })}
+                  {...(schemaPic.height > 0 && { height: schemaPic.height })}
                   className="max-h-full max-w-full select-none object-contain"
                   draggable={false}
                 />
-                <HotspotOverlay
-                  hotspots={hotspots}
-                  imageWidth={schemaPic.width}
-                  imageHeight={schemaPic.height}
-                />
+                {schemaPic.width > 0 && schemaPic.height > 0 && (
+                  <HotspotOverlay
+                    hotspots={hotspots}
+                    imageWidth={schemaPic.width}
+                    imageHeight={schemaPic.height}
+                  />
+                )}
               </div>
             </div>
           ) : (