fix: remove nested .git folders, re-add as normal directories

ui/src/lib/theme.ts

@@ -0,0 +1,39 @@
+import { writable } from "svelte/store";
+import { browser } from "$app/environment";
+
+type Theme = "light" | "dark";
+
+function createThemeStore() {
+  const initial: Theme = browser
+    ? ((localStorage.getItem("theme") as Theme) ?? "dark")
+    : "dark";
+
+  const { subscribe, set, update } = writable<Theme>(initial);
+
+  function applyTheme(theme: Theme) {
+    if (browser) {
+      document.documentElement.setAttribute("data-theme", theme);
+      localStorage.setItem("theme", theme);
+    }
+  }
+
+  // Apply on init
+  if (browser) applyTheme(initial);
+
+  return {
+    subscribe,
+    toggle() {
+      update((current) => {
+        const next = current === "dark" ? "light" : "dark";
+        applyTheme(next);
+        return next;
+      });
+    },
+    set(theme: Theme) {
+      applyTheme(theme);
+      set(theme);
+    },
+  };
+}
+
+export const theme = createThemeStore();