Fjern hjemmeskjerm-widget

Widgeten har vært en vedlikeholdskostnad uten et klart produktformål:
den duplikerte lokasjonslogikken fra hovedappen, kunne vise inntil
24 timer gammel GPS-posisjon uten alderindikator, og krevde en egen
WorkManager-periodisk oppdatering. Den strategiske vurderingen
(2026-04-17) konkluderte med at den samme nytten kan leveres via
app-åpning eller en lettere mekanisme senere, og at flaten bør
krympes før pitch mot offentlig sektor.

Denne endringen fjerner widget/-pakken for begge flavors
(standard + fdroid), AppWidgetProvider-mottakeren i manifestet,
WidgetUpdateWorker, androidx.work:work-runtime-ktx-avhengigheten,
widget_prefs SharedPreferences-lagringen i MainActivity, samt
widget_*-strenger og linjen om «for hjemmeskjerm-widgeten» i
about-dialogen. Dokumentasjonen i CLAUDE.md, ARCHITECTURE.md,
README.md, STANDING_ON_SHOULDERS.md og fastlane-beskrivelsene
er justert tilsvarende. Historiske changelogs (v3, v5, v6, v7)
er bevisst urørt — de beskriver korrekt hva som ble levert i
de versjonene.

Eksisterende widget-plasseringer på brukernes hjemmeskjerm
forsvinner automatisk neste gang appen oppdateres; Android
fjerner foreldreløse provider-komponenter uten migreringskode.
Begge debug-flavors bygger rent etter endringen.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ARCHITECTURE.md

@@ -13,7 +13,6 @@ This document describes the architecture of Tilfluktsrom, a Norwegian emergency
   - [Compass System](#compass-system)
   - [Map & Tile Caching](#map--tile-caching)
   - [Build Variants](#build-variants)
-  - [Home Screen Widget](#home-screen-widget)
   - [Deep Linking](#deep-linking)
 - [Progressive Web App](#progressive-web-app)
   - [Module Structure](#module-structure)
@@ -41,7 +40,7 @@ This is an emergency app. Core functionality — finding the nearest shelter, co
 The Android app runs on devices without Google Play Services (LineageOS, GrapheneOS, /e/OS). Every Google-specific API has an AOSP fallback. Play Services improve accuracy and battery life when available, but are never required.
 
 ### Minimal Dependencies
-Both platforms use few, well-chosen libraries. No heavy frameworks, no external CDNs at runtime. The PWA bundles everything locally; the Android app uses only OSMDroid, Room, OkHttp, and WorkManager.
+Both platforms use few, well-chosen libraries. No heavy frameworks, no external CDNs at runtime. The PWA bundles everything locally; the Android app uses only OSMDroid, Room, and OkHttp.
 
 ### Data Sovereignty
 Shelter data comes directly from Geonorge (the Norwegian mapping authority). No intermediate servers. The app fetches, converts, and caches the data locally.
@@ -107,15 +106,12 @@ no.naiv.tilfluktsrom/
 │   ├── ShelterListAdapter.kt    # RecyclerView adapter for shelter list
 │   ├── CivilDefenseInfoDialog.kt # Emergency instructions
 │   └── AboutDialog.kt           # Privacy and copyright
-├── util/
-│   ├── CoordinateConverter.kt   # UTM33N → WGS84 (Karney method)
-│   └── DistanceUtils.kt         # Haversine distance and bearing
-└── widget/
-    ├── ShelterWidgetProvider.kt  # Home screen widget (flavor-specific)
-    └── WidgetUpdateWorker.kt     # WorkManager periodic update
+└── util/
+    ├── CoordinateConverter.kt   # UTM33N → WGS84 (Karney method)
+    └── DistanceUtils.kt         # Haversine distance and bearing
 ```
 
-Files under `location/` and `widget/` have separate implementations per build variant:
+Files under `location/` have separate implementations per build variant:
 - `app/src/standard/java/` — Google Play Services variant
 - `app/src/fdroid/java/` — AOSP-only variant
 
@@ -198,21 +194,6 @@ The `standard` flavor adds `com.google.android.gms:play-services-location`. Runt
 
 Both flavors produce identical user experiences — `standard` achieves faster GPS fixes and better battery efficiency when Play Services are present.
 
-### Home Screen Widget
-
-**ShelterWidgetProvider** displays the nearest shelter's address, capacity, and distance. Updated by:
-
-1. **MainActivity** — sends latest location on each GPS update
-2. **WorkManager** — `WidgetUpdateWorker` runs every 15 minutes, requests a fresh location fix
-3. **Manual** — user taps refresh button on the widget
-
-**Location resolution (priority order):**
-1. Location from intent (WorkManager or MainActivity)
-2. FusedLocationProviderClient cache (standard)
-3. Active GPS request (10s timeout)
-4. LocationManager cache
-5. SharedPreferences saved location (max 24h old)
-
 ### Deep Linking
 
 **HTTPS App Links:** `https://tilfluktsrom.naiv.no/shelter/{lokalId}`