chore(frontend): Svelte 5 / Vite 8 / Tailwind CSS 4 dependency set

Move the toolchain to Svelte 5.57, Vite 8.3, vite-plugin-svelte 7.3,
svelte-check 4.7.6, svelte-spa-router 5.1.1, Tailwind 4.3 (plus the
new @tailwindcss/vite plugin), flowbite-svelte 1.33 and flowbite
4.0.2.

Dropped outright: svelte-preprocess (only ever handled lang="ts",
which the vite plugin does natively), svelte-headless-table (peers
svelte ^4, dead end - the one table gets rewritten dependency-free),
postcss/autoprefixer (v4 handles transforms internally) and the
vanilla flowbite.js script tag (no data-* usage anywhere; the Svelte
components are self-contained).

Deliberately pinned, not upgraded: typescript stays 5.9
(svelte-check peers ^5||^6, and 7.x is the native-port rewrite) and
@wailsio/runtime stays 3.0.0-beta.20 (must match the Go framework and
CLI exactly - it moves in lockstep with them, never alone).

Fresh lockfile, zero npm vulnerabilities (was ten).

frontend/package.json

@@ -11,26 +11,23 @@
     "check": "svelte-check --tsconfig ./tsconfig.json"
   },
   "devDependencies": {
-    "@sveltejs/vite-plugin-svelte": "^2.4.1",
-    "@tsconfig/svelte": "^4.0.1",
-    "autoprefixer": "^10.4.20",
-    "postcss": "^8.4.45",
-    "svelte": "^4.0.0",
-    "svelte-check": "^3.4.3",
-    "svelte-headless-table": "^0.18.3",
-    "svelte-preprocess": "^5.0.3",
-    "svelte-spa-router": "^4.0.1",
-    "tailwind-merge": "^2.5.2",
-    "tailwindcss": "^3.4.10",
-    "tslib": "^2.7.0",
-    "typescript": "^5.0.0",
-    "vite": "^4.5.5"
+    "@sveltejs/vite-plugin-svelte": "^7.3.0",
+    "@tailwindcss/vite": "^4.3.3",
+    "@tsconfig/svelte": "^5.0.8",
+    "svelte": "^5.57.0",
+    "svelte-check": "^4.7.6",
+    "svelte-spa-router": "^5.1.1",
+    "tailwind-merge": "^3.7.0",
+    "tailwindcss": "^4.3.3",
+    "tslib": "^2.8.0",
+    "typescript": "^5.9.3",
+    "vite": "^8.3.0"
   },
   "dependencies": {
     "@popperjs/core": "^2.11.8",
     "@wailsio/runtime": "3.0.0-beta.20",
-    "flowbite": "^2.5.1",
-    "flowbite-svelte": "^0.46.16",
-    "moment": "^2.30.1"
+    "flowbite": "^4.0.2",
+    "flowbite-svelte": "^1.33.1",
+    "moment": "^2.31.0"
   }
 }

frontend/postcss.config.js

@@ -1,6 +0,0 @@
-export default {
-  plugins: {
-    tailwindcss: {},
-    autoprefixer: {},
-  },
-}

frontend/svelte.config.js

@@ -1,7 +0,0 @@
-import sveltePreprocess from 'svelte-preprocess'
-
-export default {
-  // Consult https://github.com/sveltejs/svelte-preprocess
-  // for more information about preprocessors
-  preprocess: sveltePreprocess()
-}

frontend/tailwind.config.js

@@ -1,44 +0,0 @@
-import flowbitePlugin from 'flowbite/plugin'
-/** @type {import('tailwindcss').Config} */
-export default {
-    content: [
-        "./index.html",
-        "./src/**/*.{svelte,js,ts,jsx,tsx}",
-        "./node_modules/flowbite/**/*.{html,js,svelte,ts}",
-        "./node_modules/flowbite-svelte/**/*.{html,js,svelte,ts}",
-    ],
-    plugins: [ flowbitePlugin ],
-
-    darkMode: 'media',
-
-    theme: {
-        container: {
-            center: true,
-            padding: {
-                DEFAULT: '1rem',
-                sm: '2rem',
-                lg: '4rem',
-                xl: '5rem',
-                '2xl': '6rem',
-            },
-        },
-        extend: {
-            colors: {
-                // flowbite-svelte
-                primary: {
-                    50: '#FFF5F2',
-                    100: '#FFF1EE',
-                    200: '#FFE4DE',
-                    300: '#FFD5CC',
-                    400: '#FFBCAD',
-                    500: '#FE795D',
-                    600: '#EF562F',
-                    700: '#EB4F27',
-                    800: '#CC4522',
-                    900: '#A5371B'
-                },
-            }
-        }
-    }
-}
-