Initial commit: OAuth IAM Laravel application

Laravel-based OAuth/IAM service with Passport, Vue 3 frontend, and
Docker Compose setup for local and production deployment.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

resources/scss/components/_page-header.scss

@@ -0,0 +1,20 @@
+@use '../abstracts/variables' as *;
+
+.page-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: $space-4;
+}
+
+.page-title {
+    font-size: $font-2xl;
+    font-weight: 600;
+    letter-spacing: -0.01em;
+    color: var(--color-text-primary);
+}
+
+.page-subtitle {
+    margin-top: $space-1;
+    color: var(--color-text-secondary);
+}