Rebuild the editor as a Vue app: sidebar, pages side by side, tile settings in a drawer (0.2.74)

The page is now web/ (Vue 3 + Vite + TypeScript), built into screen_manager/app/static
with hashed file names; server.py serves index.html as built and /assets/. The Python
API, the data and the firmware are unchanged. Your screens sit in a sidebar, the pages
of a screen stand next to each other at the screen's own shape, the library sits on the
right, and a tile's settings slide in as a drawer while the mockup stays in view. New
screen, Firmware & USB, Alerts, Override YAML and Settings are pages of their own.
Fonts moved to web/src/assets; the tests read the source through tests/editor_sources.py.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

web/src/api.ts

@@ -0,0 +1,33 @@
+// Relative URLs on purpose: the page lives under Home Assistant's ingress path
+// (/api/hassio_ingress/<token>/) and on http://127.0.0.1:8099 in SCREEN_DEV; `api/...`
+// resolves against the page in both. Writes carry the CSRF token the inventory handed out.
+let csrf = "";
+export function setCsrf(token: string) {
+  csrf = token || "";
+}
+
+export async function api(path: string, options: RequestInit = {}): Promise<Response> {
+  const response = await fetch(`api/${path}`, {
+    ...options,
+    headers: {
+      "Content-Type": "application/json",
+      "X-Screen-CSRF": csrf,
+      ...(options.headers as Record<string, string> | undefined),
+    },
+  });
+  if (!response.ok) {
+    let message = "That didn't work. Refresh the page and try again.";
+    try {
+      message = (await response.json()).error || message;
+    } catch {}
+    throw new Error(message);
+  }
+  return response;
+}
+
+export const getJson = async <T = any>(path: string): Promise<T> => (await api(path)).json();
+export const send = async <T = any>(path: string, method: string, body?: unknown, extra: RequestInit = {}): Promise<T> => {
+  const response = await api(path, { method, body: body === undefined ? undefined : JSON.stringify(body), ...extra });
+  const text = await response.text();
+  return (text ? JSON.parse(text) : null) as T;
+};