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/index.d.ts

@@ -0,0 +1,42 @@
+import type { AddedKeywordDefinition, AnySchemaObject, KeywordErrorCxt, KeywordCxtParams } from "../../types";
+import type { SchemaCxt, SchemaObjCxt } from "..";
+import { SubschemaArgs } from "./subschema";
+import { Code, Name, CodeGen } from "../codegen";
+import type { JSONType } from "../rules";
+import { ErrorPaths } from "../errors";
+export declare function validateFunctionCode(it: SchemaCxt): void;
+export declare class KeywordCxt implements KeywordErrorCxt {
+    readonly gen: CodeGen;
+    readonly allErrors?: boolean;
+    readonly keyword: string;
+    readonly data: Name;
+    readonly $data?: string | false;
+    schema: any;
+    readonly schemaValue: Code | number | boolean;
+    readonly schemaCode: Code | number | boolean;
+    readonly schemaType: JSONType[];
+    readonly parentSchema: AnySchemaObject;
+    readonly errsCount?: Name;
+    params: KeywordCxtParams;
+    readonly it: SchemaObjCxt;
+    readonly def: AddedKeywordDefinition;
+    constructor(it: SchemaObjCxt, def: AddedKeywordDefinition, keyword: string);
+    result(condition: Code, successAction?: () => void, failAction?: () => void): void;
+    failResult(condition: Code, successAction?: () => void, failAction?: () => void): void;
+    pass(condition: Code, failAction?: () => void): void;
+    fail(condition?: Code): void;
+    fail$data(condition: Code): void;
+    error(append?: boolean, errorParams?: KeywordCxtParams, errorPaths?: ErrorPaths): void;
+    private _error;
+    $dataError(): void;
+    reset(): void;
+    ok(cond: Code | boolean): void;
+    setParams(obj: KeywordCxtParams, assign?: true): void;
+    block$data(valid: Name, codeBlock: () => void, $dataValid?: Code): void;
+    check$data(valid?: Name, $dataValid?: Code): void;
+    invalid$data(): Code;
+    subschema(appl: SubschemaArgs, valid: Name): SchemaCxt;
+    mergeEvaluated(schemaCxt: SchemaCxt, toName?: typeof Name): void;
+    mergeValidEvaluated(schemaCxt: SchemaCxt, valid: Name): boolean | void;
+}
+export declare function getData($data: string, { dataLevel, dataNames, dataPathArr }: SchemaCxt): Code | number;