feat: initial smart home dashboard

- Next.js 14 + TypeScript + Tailwind CSS
- Glassmorphism design with ambient orbs
- Cards: Light x2, Temperature, AirPurifier, Tasks, Weather, Savings
- Home Assistant integration (demo mode if no token)
- Vikunja tasks API
- Pulse savings API
- wttr.in weather
- Framer Motion animations
- Dark/light theme toggle
- Bottom navigation
- Dockerfile for deployment

lib/api.ts

@@ -0,0 +1,66 @@
+export async function callHA(
+  domain: string,
+  service: string,
+  entity_id: string,
+  extra?: Record<string, any>
+) {
+  const res = await fetch("/api/ha", {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({ domain, service, entity_id, ...extra }),
+  });
+  return res.json();
+}
+
+export async function toggleLight(entity_id: string, on: boolean) {
+  return callHA("light", on ? "turn_on" : "turn_off", entity_id);
+}
+
+export async function setLightBrightness(entity_id: string, brightness: number) {
+  return callHA("light", "turn_on", entity_id, { brightness });
+}
+
+export async function toggleFan(entity_id: string, on: boolean) {
+  return callHA("fan", on ? "turn_on" : "turn_off", entity_id);
+}
+
+export async function setFanPreset(entity_id: string, preset_mode: string) {
+  return callHA("fan", "set_preset_mode", entity_id, { preset_mode });
+}
+
+export async function setClimateTemp(entity_id: string, temperature: number) {
+  return callHA("climate", "set_temperature", entity_id, { temperature });
+}
+
+export async function fetchWeather() {
+  const res = await fetch("/api/weather", { next: { revalidate: 600 } });
+  return res.json();
+}
+
+export async function fetchTasks() {
+  const res = await fetch("/api/tasks", { cache: "no-store" });
+  return res.json();
+}
+
+export async function createTask(title: string) {
+  const res = await fetch("/api/tasks", {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({ title }),
+  });
+  return res.json();
+}
+
+export async function toggleTask(id: number, done: boolean) {
+  const res = await fetch("/api/tasks", {
+    method: "PATCH",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({ id, done }),
+  });
+  return res.json();
+}
+
+export async function fetchSavings() {
+  const res = await fetch("/api/savings", { next: { revalidate: 300 } });
+  return res.json();
+}

lib/ha.ts

@@ -0,0 +1,19 @@
+export interface HAState {
+  entity_id: string;
+  state: string;
+  attributes: Record<string, any>;
+}
+
+export interface HAStates {
+  demo: boolean;
+  states: Record<string, HAState>;
+}
+
+export function getBrightnessPct(brightness?: number): number {
+  if (!brightness) return 0;
+  return Math.round((brightness / 255) * 100);
+}
+
+export function pctToBrightness(pct: number): number {
+  return Math.round((pct / 100) * 255);
+}