fix: unify project on port 1349, improve strip-metadata and UI components

Consolidate all access to localhost:1349 — Vite dev server serves on 1349
and proxies API calls to an internal dev port (13490). Production API
defaults to 1349. Also includes strip-metadata improvements, UI component
updates, and compress operation fixes.

apps/web/src/components/common/before-after-slider.tsx

@@ -102,17 +102,11 @@ export function BeforeAfterSlider({
           draggable={false}
         />
 
-        {/* After image (clipped, top layer) — checkerboard background shows transparency */}
+        {/* After image (clipped, top layer) */}
         <div
-          className="absolute inset-0"
+          className="absolute inset-0 bg-muted/30"
           style={{
             clipPath: `inset(0 0 0 ${position}%)`,
-            backgroundImage: `linear-gradient(45deg, #ccc 25%, transparent 25%),
-              linear-gradient(-45deg, #ccc 25%, transparent 25%),
-              linear-gradient(45deg, transparent 75%, #ccc 75%),
-              linear-gradient(-45deg, transparent 75%, #ccc 75%)`,
-            backgroundSize: "16px 16px",
-            backgroundPosition: "0 0, 0 8px, 8px -8px, -8px 0px",
           }}
         >
           <img