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/workbox-navigation-preload/LICENSE

@@ -0,0 +1,19 @@
+Copyright 2018 Google LLC
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

pwa/node_modules/workbox-navigation-preload/README.md

@@ -0,0 +1 @@
+This module's documentation can be found at https://developers.google.com/web/tools/workbox/modules/workbox-navigation-preload

pwa/node_modules/workbox-navigation-preload/_version.js

@@ -0,0 +1,6 @@
+"use strict";
+// @ts-ignore
+try {
+    self['workbox:navigation-preload:7.3.0'] && _();
+}
+catch (e) { }

pwa/node_modules/workbox-navigation-preload/_version.mjs

@@ -0,0 +1 @@
+try{self['workbox:navigation-preload:7.4.0']&&_()}catch(e){}// eslint-disable-line

pwa/node_modules/workbox-navigation-preload/build/workbox-navigation-preload.dev.js

@@ -0,0 +1,99 @@
+this.workbox = this.workbox || {};
+this.workbox.navigationPreload = (function (exports, logger_js) {
+    'use strict';
+
+    // @ts-ignore
+    try {
+      self['workbox:navigation-preload:7.3.0'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * @return {boolean} Whether or not the current browser supports enabling
+     * navigation preload.
+     *
+     * @memberof workbox-navigation-preload
+     */
+    function isSupported() {
+      return Boolean(self.registration && self.registration.navigationPreload);
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * If the browser supports Navigation Preload, then this will disable it.
+     *
+     * @memberof workbox-navigation-preload
+     */
+    function disable() {
+      if (isSupported()) {
+        self.addEventListener('activate', event => {
+          event.waitUntil(self.registration.navigationPreload.disable().then(() => {
+            {
+              logger_js.logger.log(`Navigation preload is disabled.`);
+            }
+          }));
+        });
+      } else {
+        {
+          logger_js.logger.log(`Navigation preload is not supported in this browser.`);
+        }
+      }
+    }
+
+    /*
+      Copyright 2018 Google LLC
+
+      Use of this source code is governed by an MIT-style
+      license that can be found in the LICENSE file or at
+      https://opensource.org/licenses/MIT.
+    */
+    /**
+     * If the browser supports Navigation Preload, then this will enable it.
+     *
+     * @param {string} [headerValue] Optionally, allows developers to
+     * [override](https://developers.google.com/web/updates/2017/02/navigation-preload#changing_the_header)
+     * the value of the `Service-Worker-Navigation-Preload` header which will be
+     * sent to the server when making the navigation request.
+     *
+     * @memberof workbox-navigation-preload
+     */
+    function enable(headerValue) {
+      if (isSupported()) {
+        self.addEventListener('activate', event => {
+          event.waitUntil(self.registration.navigationPreload.enable().then(() => {
+            // Defaults to Service-Worker-Navigation-Preload: true if not set.
+            if (headerValue) {
+              void self.registration.navigationPreload.setHeaderValue(headerValue);
+            }
+            {
+              logger_js.logger.log(`Navigation preload is enabled.`);
+            }
+          }));
+        });
+      } else {
+        {
+          logger_js.logger.log(`Navigation preload is not supported in this browser.`);
+        }
+      }
+    }
+
+    exports.disable = disable;
+    exports.enable = enable;
+    exports.isSupported = isSupported;
+
+    return exports;
+
+})({}, workbox.core._private);
+//# sourceMappingURL=workbox-navigation-preload.dev.js.map

pwa/node_modules/workbox-navigation-preload/build/workbox-navigation-preload.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.navigationPreload=function(t){"use strict";try{self["workbox:navigation-preload:7.3.0"]&&_()}catch(t){}function e(){return Boolean(self.registration&&self.registration.navigationPreload)}return t.disable=function(){e()&&self.addEventListener("activate",(t=>{t.waitUntil(self.registration.navigationPreload.disable().then((()=>{})))}))},t.enable=function(t){e()&&self.addEventListener("activate",(e=>{e.waitUntil(self.registration.navigationPreload.enable().then((()=>{t&&self.registration.navigationPreload.setHeaderValue(t)})))}))},t.isSupported=e,t}({});
+//# sourceMappingURL=workbox-navigation-preload.prod.js.map

pwa/node_modules/workbox-navigation-preload/build/workbox-navigation-preload.prod.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"workbox-navigation-preload.prod.js","sources":["../_version.js","../isSupported.js","../disable.js","../enable.js"],"sourcesContent":["\"use strict\";\n// @ts-ignore\ntry {\n    self['workbox:navigation-preload:7.3.0'] && _();\n}\ncatch (e) { }\n","/*\n  Copyright 2018 Google LLC\n\n  Use of this source code is governed by an MIT-style\n  license that can be found in the LICENSE file or at\n  https://opensource.org/licenses/MIT.\n*/\nimport './_version.js';\n/**\n * @return {boolean} Whether or not the current browser supports enabling\n * navigation preload.\n *\n * @memberof workbox-navigation-preload\n */\nfunction isSupported() {\n    return Boolean(self.registration && self.registration.navigationPreload);\n}\nexport { isSupported };\n","/*\n  Copyright 2018 Google LLC\n\n  Use of this source code is governed by an MIT-style\n  license that can be found in the LICENSE file or at\n  https://opensource.org/licenses/MIT.\n*/\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { isSupported } from './isSupported.js';\nimport './_version.js';\n/**\n * If the browser supports Navigation Preload, then this will disable it.\n *\n * @memberof workbox-navigation-preload\n */\nfunction disable() {\n    if (isSupported()) {\n        self.addEventListener('activate', (event) => {\n            event.waitUntil(self.registration.navigationPreload.disable().then(() => {\n                if (process.env.NODE_ENV !== 'production') {\n                    logger.log(`Navigation preload is disabled.`);\n                }\n            }));\n        });\n    }\n    else {\n        if (process.env.NODE_ENV !== 'production') {\n            logger.log(`Navigation preload is not supported in this browser.`);\n        }\n    }\n}\nexport { disable };\n","/*\n  Copyright 2018 Google LLC\n\n  Use of this source code is governed by an MIT-style\n  license that can be found in the LICENSE file or at\n  https://opensource.org/licenses/MIT.\n*/\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { isSupported } from './isSupported.js';\nimport './_version.js';\n/**\n * If the browser supports Navigation Preload, then this will enable it.\n *\n * @param {string} [headerValue] Optionally, allows developers to\n * [override](https://developers.google.com/web/updates/2017/02/navigation-preload#changing_the_header)\n * the value of the `Service-Worker-Navigation-Preload` header which will be\n * sent to the server when making the navigation request.\n *\n * @memberof workbox-navigation-preload\n */\nfunction enable(headerValue) {\n    if (isSupported()) {\n        self.addEventListener('activate', (event) => {\n            event.waitUntil(self.registration.navigationPreload.enable().then(() => {\n                // Defaults to Service-Worker-Navigation-Preload: true if not set.\n                if (headerValue) {\n                    void self.registration.navigationPreload.setHeaderValue(headerValue);\n                }\n                if (process.env.NODE_ENV !== 'production') {\n                    logger.log(`Navigation preload is enabled.`);\n                }\n            }));\n        });\n    }\n    else {\n        if (process.env.NODE_ENV !== 'production') {\n            logger.log(`Navigation preload is not supported in this browser.`);\n        }\n    }\n}\nexport { enable };\n"],"names":["self","_","e","isSupported","Boolean","registration","navigationPreload","addEventListener","event","waitUntil","disable","then","headerValue","enable","setHeaderValue"],"mappings":"sFAEA,IACIA,KAAK,qCAAuCC,GAChD,CACA,MAAOC,GAAG,CCSV,SAASC,IACL,OAAOC,QAAQJ,KAAKK,cAAgBL,KAAKK,aAAaC,kBAC1D,kBCDA,WACQH,KACAH,KAAKO,iBAAiB,YAAaC,IAC/BA,EAAMC,UAAUT,KAAKK,aAAaC,kBAAkBI,UAAUC,MAAK,SAIhE,GAQf,WCVA,SAAgBC,GACRT,KACAH,KAAKO,iBAAiB,YAAaC,IAC/BA,EAAMC,UAAUT,KAAKK,aAAaC,kBAAkBO,SAASF,MAAK,KAE1DC,GACKZ,KAAKK,aAAaC,kBAAkBQ,eAAeF,EAC5D,IAID,GAQf"}

pwa/node_modules/workbox-navigation-preload/disable.d.ts

@@ -0,0 +1,8 @@
+import './_version.js';
+/**
+ * If the browser supports Navigation Preload, then this will disable it.
+ *
+ * @memberof workbox-navigation-preload
+ */
+declare function disable(): void;
+export { disable };

pwa/node_modules/workbox-navigation-preload/disable.js

@@ -0,0 +1,32 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+import { logger } from 'workbox-core/_private/logger.js';
+import { isSupported } from './isSupported.js';
+import './_version.js';
+/**
+ * If the browser supports Navigation Preload, then this will disable it.
+ *
+ * @memberof workbox-navigation-preload
+ */
+function disable() {
+    if (isSupported()) {
+        self.addEventListener('activate', (event) => {
+            event.waitUntil(self.registration.navigationPreload.disable().then(() => {
+                if (process.env.NODE_ENV !== 'production') {
+                    logger.log(`Navigation preload is disabled.`);
+                }
+            }));
+        });
+    }
+    else {
+        if (process.env.NODE_ENV !== 'production') {
+            logger.log(`Navigation preload is not supported in this browser.`);
+        }
+    }
+}
+export { disable };

pwa/node_modules/workbox-navigation-preload/disable.mjs

@@ -0,0 +1 @@
+export * from './disable.js';

pwa/node_modules/workbox-navigation-preload/enable.d.ts

@@ -0,0 +1,13 @@
+import './_version.js';
+/**
+ * If the browser supports Navigation Preload, then this will enable it.
+ *
+ * @param {string} [headerValue] Optionally, allows developers to
+ * [override](https://developers.google.com/web/updates/2017/02/navigation-preload#changing_the_header)
+ * the value of the `Service-Worker-Navigation-Preload` header which will be
+ * sent to the server when making the navigation request.
+ *
+ * @memberof workbox-navigation-preload
+ */
+declare function enable(headerValue?: string): void;
+export { enable };

pwa/node_modules/workbox-navigation-preload/enable.js

@@ -0,0 +1,41 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+import { logger } from 'workbox-core/_private/logger.js';
+import { isSupported } from './isSupported.js';
+import './_version.js';
+/**
+ * If the browser supports Navigation Preload, then this will enable it.
+ *
+ * @param {string} [headerValue] Optionally, allows developers to
+ * [override](https://developers.google.com/web/updates/2017/02/navigation-preload#changing_the_header)
+ * the value of the `Service-Worker-Navigation-Preload` header which will be
+ * sent to the server when making the navigation request.
+ *
+ * @memberof workbox-navigation-preload
+ */
+function enable(headerValue) {
+    if (isSupported()) {
+        self.addEventListener('activate', (event) => {
+            event.waitUntil(self.registration.navigationPreload.enable().then(() => {
+                // Defaults to Service-Worker-Navigation-Preload: true if not set.
+                if (headerValue) {
+                    void self.registration.navigationPreload.setHeaderValue(headerValue);
+                }
+                if (process.env.NODE_ENV !== 'production') {
+                    logger.log(`Navigation preload is enabled.`);
+                }
+            }));
+        });
+    }
+    else {
+        if (process.env.NODE_ENV !== 'production') {
+            logger.log(`Navigation preload is not supported in this browser.`);
+        }
+    }
+}
+export { enable };

pwa/node_modules/workbox-navigation-preload/enable.mjs

@@ -0,0 +1 @@
+export * from './enable.js';

pwa/node_modules/workbox-navigation-preload/index.d.ts

@@ -0,0 +1,23 @@
+import { disable } from './disable.js';
+import { enable } from './enable.js';
+import { isSupported } from './isSupported.js';
+import './_version.js';
+interface NavigationPreloadState {
+    enabled?: boolean;
+    headerValue?: string;
+}
+interface NavigationPreloadManager {
+    disable(): Promise<void>;
+    enable(): Promise<void>;
+    getState(): Promise<NavigationPreloadState>;
+    setHeaderValue(value: string): Promise<void>;
+}
+declare global {
+    interface ServiceWorkerRegistration {
+        readonly navigationPreload: NavigationPreloadManager;
+    }
+}
+/**
+ * @module workbox-navigation-preload
+ */
+export { disable, enable, isSupported };

pwa/node_modules/workbox-navigation-preload/index.js

@@ -0,0 +1,15 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+import { disable } from './disable.js';
+import { enable } from './enable.js';
+import { isSupported } from './isSupported.js';
+import './_version.js';
+/**
+ * @module workbox-navigation-preload
+ */
+export { disable, enable, isSupported };

pwa/node_modules/workbox-navigation-preload/index.mjs

@@ -0,0 +1 @@
+export * from './index.js';

pwa/node_modules/workbox-navigation-preload/isSupported.d.ts

@@ -0,0 +1,9 @@
+import './_version.js';
+/**
+ * @return {boolean} Whether or not the current browser supports enabling
+ * navigation preload.
+ *
+ * @memberof workbox-navigation-preload
+ */
+declare function isSupported(): boolean;
+export { isSupported };

pwa/node_modules/workbox-navigation-preload/isSupported.js

@@ -0,0 +1,18 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+import './_version.js';
+/**
+ * @return {boolean} Whether or not the current browser supports enabling
+ * navigation preload.
+ *
+ * @memberof workbox-navigation-preload
+ */
+function isSupported() {
+    return Boolean(self.registration && self.registration.navigationPreload);
+}
+export { isSupported };

pwa/node_modules/workbox-navigation-preload/isSupported.mjs

@@ -0,0 +1 @@
+export * from './isSupported.js';

pwa/node_modules/workbox-navigation-preload/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "workbox-navigation-preload",
+  "version": "7.4.0",
+  "license": "MIT",
+  "author": "Google's Web DevRel Team and Google's Aurora Team",
+  "description": "This library allows developers to opt-in to using Navigation Preload in their service worker.",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/googlechrome/workbox.git"
+  },
+  "bugs": "https://github.com/googlechrome/workbox/issues",
+  "homepage": "https://github.com/GoogleChrome/workbox",
+  "keywords": [
+    "workbox",
+    "workboxjs",
+    "service worker",
+    "sw",
+    "navigation"
+  ],
+  "workbox": {
+    "browserNamespace": "workbox.navigationPreload",
+    "packageType": "sw"
+  },
+  "main": "index.js",
+  "module": "index.mjs",
+  "types": "index.d.ts",
+  "dependencies": {
+    "workbox-core": "7.4.0"
+  },
+  "gitHead": "fa702feeddd417fcdfa495cd9428fb4a28632e92"
+}

pwa/node_modules/workbox-navigation-preload/src/_version.ts

@@ -0,0 +1,2 @@
+// @ts-ignore
+try{self['workbox:navigation-preload:7.4.0']&&_()}catch(e){}

pwa/node_modules/workbox-navigation-preload/src/disable.ts

@@ -0,0 +1,39 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {logger} from 'workbox-core/_private/logger.js';
+import {isSupported} from './isSupported.js';
+import './_version.js';
+
+// Give TypeScript the correct global.
+declare let self: ServiceWorkerGlobalScope;
+
+/**
+ * If the browser supports Navigation Preload, then this will disable it.
+ *
+ * @memberof workbox-navigation-preload
+ */
+function disable(): void {
+  if (isSupported()) {
+    self.addEventListener('activate', (event: ExtendableEvent) => {
+      event.waitUntil(
+        self.registration.navigationPreload.disable().then(() => {
+          if (process.env.NODE_ENV !== 'production') {
+            logger.log(`Navigation preload is disabled.`);
+          }
+        }),
+      );
+    });
+  } else {
+    if (process.env.NODE_ENV !== 'production') {
+      logger.log(`Navigation preload is not supported in this browser.`);
+    }
+  }
+}
+
+export {disable};

pwa/node_modules/workbox-navigation-preload/src/enable.ts

@@ -0,0 +1,51 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {logger} from 'workbox-core/_private/logger.js';
+import {isSupported} from './isSupported.js';
+import './_version.js';
+
+// Give TypeScript the correct global.
+declare let self: ServiceWorkerGlobalScope;
+
+/**
+ * If the browser supports Navigation Preload, then this will enable it.
+ *
+ * @param {string} [headerValue] Optionally, allows developers to
+ * [override](https://developers.google.com/web/updates/2017/02/navigation-preload#changing_the_header)
+ * the value of the `Service-Worker-Navigation-Preload` header which will be
+ * sent to the server when making the navigation request.
+ *
+ * @memberof workbox-navigation-preload
+ */
+function enable(headerValue?: string): void {
+  if (isSupported()) {
+    self.addEventListener('activate', (event: ExtendableEvent) => {
+      event.waitUntil(
+        self.registration.navigationPreload.enable().then(() => {
+          // Defaults to Service-Worker-Navigation-Preload: true if not set.
+          if (headerValue) {
+            void self.registration.navigationPreload.setHeaderValue(
+              headerValue,
+            );
+          }
+
+          if (process.env.NODE_ENV !== 'production') {
+            logger.log(`Navigation preload is enabled.`);
+          }
+        }),
+      );
+    });
+  } else {
+    if (process.env.NODE_ENV !== 'production') {
+      logger.log(`Navigation preload is not supported in this browser.`);
+    }
+  }
+}
+
+export {enable};

pwa/node_modules/workbox-navigation-preload/src/index.ts

@@ -0,0 +1,37 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import {disable} from './disable.js';
+import {enable} from './enable.js';
+import {isSupported} from './isSupported.js';
+import './_version.js';
+
+// See https://github.com/GoogleChrome/workbox/issues/2946
+interface NavigationPreloadState {
+  enabled?: boolean;
+  headerValue?: string;
+}
+
+interface NavigationPreloadManager {
+  disable(): Promise<void>;
+  enable(): Promise<void>;
+  getState(): Promise<NavigationPreloadState>;
+  setHeaderValue(value: string): Promise<void>;
+}
+
+declare global {
+  interface ServiceWorkerRegistration {
+    readonly navigationPreload: NavigationPreloadManager;
+  }
+}
+
+/**
+ * @module workbox-navigation-preload
+ */
+
+export {disable, enable, isSupported};

pwa/node_modules/workbox-navigation-preload/src/isSupported.ts

@@ -0,0 +1,24 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import './_version.js';
+
+// Give TypeScript the correct global.
+declare let self: ServiceWorkerGlobalScope;
+
+/**
+ * @return {boolean} Whether or not the current browser supports enabling
+ * navigation preload.
+ *
+ * @memberof workbox-navigation-preload
+ */
+function isSupported(): boolean {
+  return Boolean(self.registration && self.registration.navigationPreload);
+}
+
+export {isSupported};

pwa/node_modules/workbox-navigation-preload/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../../tsconfig",
+  "compilerOptions": {
+    "outDir": "./",
+    "rootDir": "./src",
+    "tsBuildInfoFile": "./tsconfig.tsbuildinfo"
+  },
+  "include": ["src/**/*.ts"],
+  "references": [{"path": "../workbox-core/"}]
+}