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/compile/validate/boolSchema.js

@@ -0,0 +1,50 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.boolOrEmptySchema = exports.topBoolOrEmptySchema = void 0;
+const errors_1 = require("../errors");
+const codegen_1 = require("../codegen");
+const names_1 = require("../names");
+const boolError = {
+    message: "boolean schema is false",
+};
+function topBoolOrEmptySchema(it) {
+    const { gen, schema, validateName } = it;
+    if (schema === false) {
+        falseSchemaError(it, false);
+    }
+    else if (typeof schema == "object" && schema.$async === true) {
+        gen.return(names_1.default.data);
+    }
+    else {
+        gen.assign((0, codegen_1._) `${validateName}.errors`, null);
+        gen.return(true);
+    }
+}
+exports.topBoolOrEmptySchema = topBoolOrEmptySchema;
+function boolOrEmptySchema(it, valid) {
+    const { gen, schema } = it;
+    if (schema === false) {
+        gen.var(valid, false); // TODO var
+        falseSchemaError(it);
+    }
+    else {
+        gen.var(valid, true); // TODO var
+    }
+}
+exports.boolOrEmptySchema = boolOrEmptySchema;
+function falseSchemaError(it, overrideAllErrors) {
+    const { gen, data } = it;
+    // TODO maybe some other interface should be used for non-keyword validation errors...
+    const cxt = {
+        gen,
+        keyword: "false schema",
+        data,
+        schema: false,
+        schemaCode: false,
+        schemaValue: false,
+        params: {},
+        it,
+    };
+    (0, errors_1.reportError)(cxt, boolError, undefined, overrideAllErrors);
+}
+//# sourceMappingURL=boolSchema.js.map