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/util.d.ts

@@ -0,0 +1,40 @@
+import type { AnySchema, EvaluatedProperties, EvaluatedItems } from "../types";
+import type { SchemaCxt, SchemaObjCxt } from ".";
+import { Code, Name, CodeGen } from "./codegen";
+import type { Rule, ValidationRules } from "./rules";
+export declare function toHash<T extends string = string>(arr: T[]): {
+    [K in T]?: true;
+};
+export declare function alwaysValidSchema(it: SchemaCxt, schema: AnySchema): boolean | void;
+export declare function checkUnknownRules(it: SchemaCxt, schema?: AnySchema): void;
+export declare function schemaHasRules(schema: AnySchema, rules: {
+    [Key in string]?: boolean | Rule;
+}): boolean;
+export declare function schemaHasRulesButRef(schema: AnySchema, RULES: ValidationRules): boolean;
+export declare function schemaRefOrVal({ topSchemaRef, schemaPath }: SchemaObjCxt, schema: unknown, keyword: string, $data?: string | false): Code | number | boolean;
+export declare function unescapeFragment(str: string): string;
+export declare function escapeFragment(str: string | number): string;
+export declare function escapeJsonPointer(str: string | number): string;
+export declare function unescapeJsonPointer(str: string): string;
+export declare function eachItem<T>(xs: T | T[], f: (x: T) => void): void;
+type SomeEvaluated = EvaluatedProperties | EvaluatedItems;
+type MergeEvaluatedFunc<T extends SomeEvaluated> = (gen: CodeGen, from: Name | T, to: Name | Exclude<T, true> | undefined, toName?: typeof Name) => Name | T;
+interface MergeEvaluated {
+    props: MergeEvaluatedFunc<EvaluatedProperties>;
+    items: MergeEvaluatedFunc<EvaluatedItems>;
+}
+export declare const mergeEvaluated: MergeEvaluated;
+export declare function evaluatedPropsToName(gen: CodeGen, ps?: EvaluatedProperties): Name;
+export declare function setEvaluated(gen: CodeGen, props: Name, ps: {
+    [K in string]?: true;
+}): void;
+export declare function useFunc(gen: CodeGen, f: {
+    code: string;
+}): Name;
+export declare enum Type {
+    Num = 0,
+    Str = 1
+}
+export declare function getErrorPath(dataProp: Name | string | number, dataPropType?: Type, jsPropertySyntax?: boolean): Code | string;
+export declare function checkStrictMode(it: SchemaCxt, msg: string, mode?: boolean | "log"): void;
+export {};