fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/astro/dist/runtime/client/dev-toolbar/ui-library/toggle.d.ts

@@ -0,0 +1,17 @@
+declare const styles: readonly ["purple", "gray", "red", "green", "yellow", "blue"];
+type ToggleStyle = (typeof styles)[number];
+export declare class DevToolbarToggle extends HTMLElement {
+    shadowRoot: ShadowRoot;
+    input: HTMLInputElement;
+    _toggleStyle: ToggleStyle;
+    get toggleStyle(): "red" | "green" | "yellow" | "blue" | "gray" | "purple";
+    set toggleStyle(value: "red" | "green" | "yellow" | "blue" | "gray" | "purple");
+    static observedAttributes: string[];
+    constructor();
+    attributeChangedCallback(): void;
+    updateStyle(): void;
+    connectedCallback(): void;
+    get value(): string;
+    set value(val: string);
+}
+export {};