Add progressive web app companion for cross-platform access

Vite + TypeScript PWA that mirrors the Android app's core features:
- Pre-processed shelter data (build-time UTM33N→WGS84 conversion)
- Leaflet map with shelter markers, user location, and offline tiles
- Canvas compass arrow (ported from DirectionArrowView.kt)
- IndexedDB shelter cache with 7-day staleness check
- Service worker with CacheFirst tiles and precached app shell
- i18n for en, nb, nn (ported from Android strings.xml)
- iOS/Android compass handling with low-pass filter
- Respects user map interaction (no auto-snap on pan/zoom)
- Build revision cache-breaker for reliable SW updates

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pwa/node_modules/tinyspy/dist/index.js

@@ -0,0 +1,149 @@
+// src/utils.ts
+function d(e, t) {
+  if (!e)
+    throw new Error(t);
+}
+function y(e, t) {
+  return typeof t === e;
+}
+function w(e) {
+  return e instanceof Promise;
+}
+function f(e, t, n) {
+  Object.defineProperty(e, t, n);
+}
+function l(e, t, n) {
+  Object.defineProperty(e, t, { value: n });
+}
+
+// src/constants.ts
+var u = Symbol.for("tinyspy:spy");
+
+// src/internal.ts
+var x = /* @__PURE__ */ new Set(), P = (e) => {
+  e.called = !1, e.callCount = 0, e.calls = [], e.results = [], e.resolves = [], e.next = [];
+}, K = (e) => (f(e, u, { value: { reset: () => P(e[u]) } }), e[u]), T = (e) => e[u] || K(e);
+function m(e) {
+  d(
+    y("function", e) || y("undefined", e),
+    "cannot spy on a non-function value"
+  );
+  let t = function(...s) {
+    let r = T(t);
+    r.called = !0, r.callCount++, r.calls.push(s);
+    let S = r.next.shift();
+    if (S) {
+      r.results.push(S);
+      let [o, g] = S;
+      if (o === "ok")
+        return g;
+      throw g;
+    }
+    let p, c = "ok", a = r.results.length;
+    if (r.impl)
+      try {
+        new.target ? p = Reflect.construct(r.impl, s, new.target) : p = r.impl.apply(this, s), c = "ok";
+      } catch (o) {
+        throw p = o, c = "error", r.results.push([c, o]), o;
+      }
+    let R = [c, p];
+    return w(p) && p.then(
+      (o) => r.resolves[a] = ["ok", o],
+      (o) => r.resolves[a] = ["error", o]
+    ), r.results.push(R), p;
+  };
+  l(t, "_isMockFunction", !0), l(t, "length", e ? e.length : 0), l(t, "name", e && e.name || "spy");
+  let n = T(t);
+  return n.reset(), n.impl = e, t;
+}
+function A(e) {
+  let t = T(e);
+  "returns" in e || (f(e, "returns", {
+    get: () => t.results.map(([, n]) => n)
+  }), [
+    "called",
+    "callCount",
+    "results",
+    "resolves",
+    "calls",
+    "reset",
+    "impl"
+  ].forEach(
+    (n) => f(e, n, { get: () => t[n], set: (s) => t[n] = s })
+  ), l(e, "nextError", (n) => (t.next.push(["error", n]), t)), l(e, "nextResult", (n) => (t.next.push(["ok", n]), t)));
+}
+
+// src/spy.ts
+function L(e) {
+  let t = m(e);
+  return A(t), t;
+}
+
+// src/spyOn.ts
+var k = (e, t) => Object.getOwnPropertyDescriptor(e, t), O = (e, t) => {
+  t != null && typeof t == "function" && t.prototype != null && Object.setPrototypeOf(e.prototype, t.prototype);
+};
+function C(e, t, n) {
+  d(
+    !y("undefined", e),
+    "spyOn could not find an object to spy upon"
+  ), d(
+    y("object", e) || y("function", e),
+    "cannot spyOn on a primitive value"
+  );
+  let [s, r] = (() => {
+    if (!y("object", t))
+      return [t, "value"];
+    if ("getter" in t && "setter" in t)
+      throw new Error("cannot spy on both getter and setter");
+    if ("getter" in t)
+      return [t.getter, "get"];
+    if ("setter" in t)
+      return [t.setter, "set"];
+    throw new Error("specify getter or setter to spy on");
+  })(), S = k(e, s), p = Object.getPrototypeOf(e), c = p && k(p, s), a = S || c;
+  d(
+    a || s in e,
+    `${String(s)} does not exist`
+  );
+  let R = !1;
+  r === "value" && a && !a.value && a.get && (r = "get", R = !0, n = a.get());
+  let o;
+  a ? o = a[r] : r !== "value" ? o = () => e[s] : o = e[s];
+  let g = (v) => {
+    let { value: M, ...h } = a || {
+      configurable: !0,
+      writable: !0
+    };
+    r !== "value" && delete h.writable, h[r] = v, f(e, s, h);
+  }, b = () => a ? f(e, s, a) : g(o);
+  n || (n = o);
+  let i = m(n);
+  r === "value" && O(i, o);
+  let I = i[u];
+  return l(I, "restore", b), l(I, "getOriginal", () => R ? o() : o), l(I, "willCall", (v) => (I.impl = v, i)), g(
+    R ? () => (O(i, n), i) : i
+  ), x.add(i), i;
+}
+function U(e, t, n) {
+  let s = C(e, t, n);
+  return A(s), ["restore", "getOriginal", "willCall"].forEach((r) => {
+    l(s, r, s[u][r]);
+  }), s;
+}
+
+// src/restoreAll.ts
+function Y() {
+  for (let e of x)
+    e.restore();
+  x.clear();
+}
+export {
+  m as createInternalSpy,
+  T as getInternalState,
+  C as internalSpyOn,
+  Y as restoreAll,
+  x as spies,
+  L as spy,
+  U as spyOn
+};