chore(dev): add HTTPS Vite dev server and HTTP launch profile

Serve Vite over HTTPS on :7081 using a certificate exported from dotnet dev-certs (scripts/dev-certs.ps1). Add an http launch profile on :5078 as the default backend and point the /api proxy at it, so dev runs on defaults without env vars.

client/vite.config.ts

@@ -1,11 +1,30 @@
+import fs from 'node:fs'
+import { fileURLToPath } from 'node:url'
 import vue from '@vitejs/plugin-vue'
 import { defineConfig } from 'vite'
 
+// Certyfikat PEM wygenerowany przez scripts/dev-certs.ps1 (dotnet dev-certs https).
+const certDir = fileURLToPath(new URL('./.certs', import.meta.url))
+const certFile = `${certDir}/dev.pem`
+const keyFile = `${certDir}/dev-key.pem`
+const hasCerts = fs.existsSync(certFile) && fs.existsSync(keyFile)
+
+if (!hasCerts) {
+  console.warn(
+    '[vite] Brak certyfikatów w client/.certs — dev-server wstanie po HTTP. ' +
+      'Uruchom: pwsh ../scripts/dev-certs.ps1 (z katalogu client/).',
+  )
+}
+
+// Domyślnie backend z profilu `http` (launchSettings.json), port 5078.
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [vue()],
   server: {
-    port: 5173,
+    port: 7081,
+    https: hasCerts
+      ? { cert: fs.readFileSync(certFile), key: fs.readFileSync(keyFile) }
+      : undefined,
     proxy: {
       '/api': {
         target: 'http://localhost:5078',