v0.2.0 - Design Editor: templates, patterns, header/footer variations

Full Design Editor compatibility with custom block categories, page templates,
header/footer variations, and navigation styles. Both FSE (admin) and Twig
(frontend) sides kept in sync.

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

src/scss/_editor-overrides.scss

@@ -0,0 +1,29 @@
+// Editor-specific overrides
+// Adjustments for the block editor iframe to match frontend appearance
+
+.editor-styles-wrapper {
+    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+    line-height: 1.5;
+
+    a {
+        text-decoration-thickness: 1px !important;
+        text-underline-offset: 0.1em;
+    }
+
+    // Alignment overrides matching Bootstrap container widths
+    .alignfull {
+        margin-left: 0;
+        margin-right: 0;
+    }
+
+    .alignwide {
+        max-width: 1140px;
+        margin-left: auto;
+        margin-right: auto;
+    }
+
+    // Block gap matching theme.json blockGap
+    > * + * {
+        margin-block-start: 1.5rem;
+    }
+}