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/ajv/dist/vocabularies/validation/index.js

@@ -0,0 +1,33 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const limitNumber_1 = require("./limitNumber");
+const multipleOf_1 = require("./multipleOf");
+const limitLength_1 = require("./limitLength");
+const pattern_1 = require("./pattern");
+const limitProperties_1 = require("./limitProperties");
+const required_1 = require("./required");
+const limitItems_1 = require("./limitItems");
+const uniqueItems_1 = require("./uniqueItems");
+const const_1 = require("./const");
+const enum_1 = require("./enum");
+const validation = [
+    // number
+    limitNumber_1.default,
+    multipleOf_1.default,
+    // string
+    limitLength_1.default,
+    pattern_1.default,
+    // object
+    limitProperties_1.default,
+    required_1.default,
+    // array
+    limitItems_1.default,
+    uniqueItems_1.default,
+    // any
+    { keyword: "type", schemaType: ["string", "array"] },
+    { keyword: "nullable", schemaType: "boolean" },
+    const_1.default,
+    enum_1.default,
+];
+exports.default = validation;
+//# sourceMappingURL=index.js.map