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/@vitest/pretty-format/dist/index.d.ts

@@ -0,0 +1,117 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+interface Colors {
+    comment: {
+        close: string;
+        open: string;
+    };
+    content: {
+        close: string;
+        open: string;
+    };
+    prop: {
+        close: string;
+        open: string;
+    };
+    tag: {
+        close: string;
+        open: string;
+    };
+    value: {
+        close: string;
+        open: string;
+    };
+}
+type Indent = (arg0: string) => string;
+type Refs = Array<unknown>;
+type Print = (arg0: unknown) => string;
+type Theme = Required<{
+    comment?: string;
+    content?: string;
+    prop?: string;
+    tag?: string;
+    value?: string;
+}>;
+type CompareKeys = ((a: string, b: string) => number) | null | undefined;
+type RequiredOptions = Required<PrettyFormatOptions>;
+interface Options extends Omit<RequiredOptions, 'compareKeys' | 'theme'> {
+    compareKeys: CompareKeys;
+    theme: Theme;
+}
+interface PrettyFormatOptions {
+    callToJSON?: boolean;
+    escapeRegex?: boolean;
+    escapeString?: boolean;
+    highlight?: boolean;
+    indent?: number;
+    maxDepth?: number;
+    maxWidth?: number;
+    min?: boolean;
+    printBasicPrototype?: boolean;
+    printFunctionName?: boolean;
+    compareKeys?: CompareKeys;
+    plugins?: Plugins;
+}
+type OptionsReceived = PrettyFormatOptions;
+interface Config {
+    callToJSON: boolean;
+    compareKeys: CompareKeys;
+    colors: Colors;
+    escapeRegex: boolean;
+    escapeString: boolean;
+    indent: string;
+    maxDepth: number;
+    maxWidth: number;
+    min: boolean;
+    plugins: Plugins;
+    printBasicPrototype: boolean;
+    printFunctionName: boolean;
+    spacingInner: string;
+    spacingOuter: string;
+}
+type Printer = (val: unknown, config: Config, indentation: string, depth: number, refs: Refs, hasCalledToJSON?: boolean) => string;
+type Test = (arg0: any) => boolean;
+interface NewPlugin {
+    serialize: (val: any, config: Config, indentation: string, depth: number, refs: Refs, printer: Printer) => string;
+    test: Test;
+}
+interface PluginOptions {
+    edgeSpacing: string;
+    min: boolean;
+    spacing: string;
+}
+interface OldPlugin {
+    print: (val: unknown, print: Print, indent: Indent, options: PluginOptions, colors: Colors) => string;
+    test: Test;
+}
+type Plugin = NewPlugin | OldPlugin;
+type Plugins = Array<Plugin>;
+
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+declare const DEFAULT_OPTIONS: Options;
+/**
+ * Returns a presentation string of your `val` object
+ * @param val any potential JavaScript object
+ * @param options Custom settings
+ */
+declare function format(val: unknown, options?: OptionsReceived): string;
+declare const plugins: {
+    AsymmetricMatcher: NewPlugin;
+    DOMCollection: NewPlugin;
+    DOMElement: NewPlugin;
+    Immutable: NewPlugin;
+    ReactElement: NewPlugin;
+    ReactTestComponent: NewPlugin;
+};
+
+export { type Colors, type CompareKeys, type Config, DEFAULT_OPTIONS, type NewPlugin, type OldPlugin, type Options, type OptionsReceived, type Plugin, type Plugins, type PrettyFormatOptions, type Printer, type Refs, type Theme, format, plugins };