add: search bar

Add new header and search bar

app/assets/styles/page.css

@@ -0,0 +1,34 @@
+.filter-bar {
+    background: var(--color-lightest);
+    display: flex;
+    justify-content: space-between;
+    padding: 1rem;
+
+    & > button {
+        all: unset;
+        cursor: pointer;
+        color: var(--color-main-darkest);
+        font-weight: bolder;
+        font-family: 'Roboto', sans-serif;
+
+        &.active {
+            color: var(--color-main-darkest);
+        }
+
+        &:not(.active) {
+            opacity: .5;
+        }
+    }
+}
+
+.search-bar {
+    padding: 0 1rem 1rem 1rem;
+}
+
+.content {
+    min-height: 100dvh;
+    border-top-left-radius: 15px;
+    border-top-right-radius: 15px;
+    overflow: hidden;
+    background: var(--color-lightest);
+}