fix: iOS PWA bottom nav shifting up in standalone mode

In iOS WebKit standalone (home screen) mode, position:fixed elements
move with the page when the body itself becomes scrollable - unlike
regular Safari where fixed elements stay pinned. The root cause was
body having min-height: 100dvh without overflow: hidden, which allowed
body scroll to occur when content overflowed.

Fix: html and body are now overflow: hidden with fixed height (100% / 100dvh)
so all scrolling is confined to .app-content. Service worker bumped to
shell-v30 to force re-download of reset.css on installed PWAs.

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.17.4] - 2026-04-13
+
+### Fixed
+- iOS PWA: bottom navigation no longer shifts upward in standalone mode - root cause was `body` having `min-height: 100dvh` and no `overflow: hidden`, which allowed the body to scroll; in iOS WebKit standalone mode, body scroll moves `position: fixed` elements rather than keeping them pinned; fix: `html` and `body` are now `overflow: hidden` with fixed height so all scrolling is confined to `.app-content`
+- Service worker: cache bumped to `shell-v30` to ensure iOS devices receive the updated `reset.css`
+
 ## [0.17.3] - 2026-04-13
 
 ### Fixed

package.json

@@ -1,6 +1,6 @@
 {
   "name": "oikos",
-  "version": "0.17.3",
+  "version": "0.17.4",
   "description": "Self-hosted family planner - calendar, tasks, shopping, meal planning, budget and more. Private, open-source, no subscription.",
   "main": "server/index.js",
   "type": "module",

public/styles/reset.css

@@ -21,11 +21,14 @@ html {
   scroll-behavior: smooth;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
+  /* iOS PWA: verhindert Body-Scroll, der position:fixed-Elemente verschiebt */
+  height: 100%;
+  overflow: hidden;
 }
 
 body {
-  min-height: 100dvh;
-  overflow-x: hidden;
+  height: 100dvh;
+  overflow: hidden;
 }
 
 img, svg, video {

public/sw.js

@@ -12,7 +12,7 @@
  *   API: Immer Netzwerk (kein Caching von Nutzerdaten)
  */
 
-const SHELL_CACHE   = 'oikos-shell-v29';
+const SHELL_CACHE   = 'oikos-shell-v30';
 const PAGES_CACHE   = 'oikos-pages-v28';
 const ASSETS_CACHE  = 'oikos-assets-v27';
 const ALL_CACHES    = [SHELL_CACHE, PAGES_CACHE, ASSETS_CACHE];