feat: Reinitialize frontend with SvelteKit and TypeScript

- Delete old Vite+Svelte frontend
- Initialize new SvelteKit project with TypeScript
- Configure Tailwind CSS v4 + DaisyUI
- Implement JWT authentication with auto-refresh
- Create login page with form validation (Zod)
- Add protected route guards
- Update Docker configuration for single-stage build
- Add E2E tests with Playwright (6/11 passing)
- Fix Svelte 5 reactivity with $state() runes

Known issues:
- 5 E2E tests failing (timing/async issues)
- Token refresh implementation needs debugging
- Validation error display timing

frontend/node_modules/libphonenumber-js/source/tools/semver-compare.js

@@ -0,0 +1,26 @@
+// Copy-pasted from:
+// https://github.com/substack/semver-compare/blob/master/index.js
+//
+// Inlining this function because some users reported issues with
+// importing from `semver-compare` in a browser with ES6 "native" modules.
+//
+// Fixes `semver-compare` not being able to compare versions with alpha/beta/etc "tags".
+// https://github.com/catamphetamine/libphonenumber-js/issues/381
+export default function(a, b) {
+    a = a.split('-')
+    b = b.split('-')
+    var pa = a[0].split('.')
+    var pb = b[0].split('.')
+    for (var i = 0; i < 3; i++) {
+        var na = Number(pa[i])
+        var nb = Number(pb[i])
+        if (na > nb) return 1
+        if (nb > na) return -1
+        if (!isNaN(na) && isNaN(nb)) return 1
+        if (isNaN(na) && !isNaN(nb)) return -1
+    }
+    if (a[1] && b[1]) {
+        return a[1] > b[1] ? 1 : (a[1] < b[1] ? -1 : 0)
+    }
+    return !a[1] && b[1] ? 1 : (a[1] && !b[1] ? -1 : 0)
+}

frontend/node_modules/libphonenumber-js/source/tools/semver-compare.test.js

@@ -0,0 +1,40 @@
+import semverCompare from './semver-compare.js'
+
+describe('semver-compare', () => {
+	it('should compare versions', () => {
+		const versions = [
+			'1.2.3',
+			'4.11.6',
+			'4.2.0',
+			'1.5.19',
+			'1.5.6',
+			'1.5.4',
+			'1.5.5-alpha.beta',
+			'1.5.5-alpha',
+			'1.5.5',
+			'1.5.5-rc.1',
+			'1.5.5-beta.0',
+			'4.1.3',
+			'2.3.1',
+			'10.5.5',
+			'11.3.0'
+		]
+		expect(versions.sort(semverCompare)).to.deep.equal([
+			'1.2.3',
+			'1.5.4',
+			'1.5.5-alpha',
+			'1.5.5-alpha.beta',
+			'1.5.5-beta.0',
+			'1.5.5-rc.1',
+			'1.5.5',
+			'1.5.6',
+			'1.5.19',
+			'2.3.1',
+			'4.1.3',
+			'4.2.0',
+			'4.11.6',
+			'10.5.5',
+			'11.3.0'
+		])
+	})
+})