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/zod/src/v4/classic/tests/nested-refine.test.ts

@@ -0,0 +1,168 @@
+import { expect, test } from "vitest";
+import * as z from "zod/v4";
+
+test("nested refinements", () => {
+  const zodSchema = z
+    .object({
+      password: z.string().min(1),
+      nested: z
+        .object({
+          confirm: z
+            .string()
+            .min(1)
+            .refine((value) => value.length > 2, {
+              message: "Confirm length should be > 2",
+            }),
+        })
+        .refine(
+          (data) => {
+            return data.confirm === "bar";
+          },
+          {
+            path: ["confirm"],
+            error: 'Value must be "bar"',
+          }
+        ),
+    })
+    .refine(
+      (data) => {
+        return data.nested.confirm === data.password;
+      },
+      {
+        path: ["nested", "confirm"],
+        error: "Password and confirm must match",
+      }
+    );
+
+  const DATA = {
+    password: "bar",
+    nested: { confirm: "" },
+  };
+  expect(zodSchema.safeParse(DATA)).toMatchInlineSnapshot(`
+    {
+      "error": [ZodError: [
+      {
+        "origin": "string",
+        "code": "too_small",
+        "minimum": 1,
+        "inclusive": true,
+        "path": [
+          "nested",
+          "confirm"
+        ],
+        "message": "Too small: expected string to have >=1 characters"
+      },
+      {
+        "code": "custom",
+        "path": [
+          "nested",
+          "confirm"
+        ],
+        "message": "Confirm length should be > 2"
+      },
+      {
+        "code": "custom",
+        "path": [
+          "nested",
+          "confirm"
+        ],
+        "message": "Value must be \\"bar\\""
+      },
+      {
+        "code": "custom",
+        "path": [
+          "nested",
+          "confirm"
+        ],
+        "message": "Password and confirm must match"
+      }
+    ]],
+      "success": false,
+    }
+  `);
+
+  expect(zodSchema.safeParse(DATA, { jitless: true })).toMatchInlineSnapshot(`
+    {
+      "error": [ZodError: [
+      {
+        "origin": "string",
+        "code": "too_small",
+        "minimum": 1,
+        "inclusive": true,
+        "path": [
+          "nested",
+          "confirm"
+        ],
+        "message": "Too small: expected string to have >=1 characters"
+      },
+      {
+        "code": "custom",
+        "path": [
+          "nested",
+          "confirm"
+        ],
+        "message": "Confirm length should be > 2"
+      },
+      {
+        "code": "custom",
+        "path": [
+          "nested",
+          "confirm"
+        ],
+        "message": "Value must be \\"bar\\""
+      },
+      {
+        "code": "custom",
+        "path": [
+          "nested",
+          "confirm"
+        ],
+        "message": "Password and confirm must match"
+      }
+    ]],
+      "success": false,
+    }
+  `);
+
+  expect(zodSchema["~standard"].validate(DATA)).toMatchInlineSnapshot(`
+    {
+      "issues": [
+        {
+          "code": "too_small",
+          "inclusive": true,
+          "message": "Too small: expected string to have >=1 characters",
+          "minimum": 1,
+          "origin": "string",
+          "path": [
+            "nested",
+            "confirm",
+          ],
+        },
+        {
+          "code": "custom",
+          "message": "Confirm length should be > 2",
+          "path": [
+            "nested",
+            "confirm",
+          ],
+        },
+        {
+          "code": "custom",
+          "message": "Value must be "bar"",
+          "path": [
+            "nested",
+            "confirm",
+          ],
+        },
+        {
+          "code": "custom",
+          "message": "Password and confirm must match",
+          "path": [
+            "nested",
+            "confirm",
+          ],
+        },
+      ],
+    }
+  `);
+});