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/jtd/discriminator.js

@@ -0,0 +1,71 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const codegen_1 = require("../../compile/codegen");
+const metadata_1 = require("./metadata");
+const nullable_1 = require("./nullable");
+const error_1 = require("./error");
+const types_1 = require("../discriminator/types");
+const error = {
+    message: (cxt) => {
+        const { schema, params } = cxt;
+        return params.discrError
+            ? params.discrError === types_1.DiscrError.Tag
+                ? `tag "${schema}" must be string`
+                : `value of tag "${schema}" must be in mapping`
+            : (0, error_1.typeErrorMessage)(cxt, "object");
+    },
+    params: (cxt) => {
+        const { schema, params } = cxt;
+        return params.discrError
+            ? (0, codegen_1._) `{error: ${params.discrError}, tag: ${schema}, tagValue: ${params.tag}}`
+            : (0, error_1.typeErrorParams)(cxt, "object");
+    },
+};
+const def = {
+    keyword: "discriminator",
+    schemaType: "string",
+    implements: ["mapping"],
+    error,
+    code(cxt) {
+        (0, metadata_1.checkMetadata)(cxt);
+        const { gen, data, schema, parentSchema } = cxt;
+        const [valid, cond] = (0, nullable_1.checkNullableObject)(cxt, data);
+        gen.if(cond);
+        validateDiscriminator();
+        gen.elseIf((0, codegen_1.not)(valid));
+        cxt.error();
+        gen.endIf();
+        cxt.ok(valid);
+        function validateDiscriminator() {
+            const tag = gen.const("tag", (0, codegen_1._) `${data}${(0, codegen_1.getProperty)(schema)}`);
+            gen.if((0, codegen_1._) `${tag} === undefined`);
+            cxt.error(false, { discrError: types_1.DiscrError.Tag, tag });
+            gen.elseIf((0, codegen_1._) `typeof ${tag} == "string"`);
+            validateMapping(tag);
+            gen.else();
+            cxt.error(false, { discrError: types_1.DiscrError.Tag, tag }, { instancePath: schema });
+            gen.endIf();
+        }
+        function validateMapping(tag) {
+            gen.if(false);
+            for (const tagValue in parentSchema.mapping) {
+                gen.elseIf((0, codegen_1._) `${tag} === ${tagValue}`);
+                gen.assign(valid, applyTagSchema(tagValue));
+            }
+            gen.else();
+            cxt.error(false, { discrError: types_1.DiscrError.Mapping, tag }, { instancePath: schema, schemaPath: "mapping", parentSchema: true });
+            gen.endIf();
+        }
+        function applyTagSchema(schemaProp) {
+            const _valid = gen.name("valid");
+            cxt.subschema({
+                keyword: "mapping",
+                schemaProp,
+                jtdDiscriminator: schema,
+            }, _valid);
+            return _valid;
+        }
+    },
+};
+exports.default = def;
+//# sourceMappingURL=discriminator.js.map