diff --git a/CLAUDE.md b/CLAUDE.md
index 4d3fec5..6139626 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -115,6 +115,12 @@ The app uses Svelte 5 runes for state management with a custom store pattern:
 
 **Hotkeys**: Use `app.hotkey(event, condition, callback)` which auto-ignores input fields and contenteditable elements.
 
+**Tooltips**: Never use the `title` attribute for tooltips — appwide. `<Button>`
+takes a `tooltip="…"` prop (it also becomes the `aria-label`, so icon-only
+buttons keep an accessible name); every other element uses the action:
+`use:tooltip={{ content: '…' }}` from `app.svelte.ts`. Both render through
+tippy.js, which the action initializes, updates and destroys.
+
 ### Project Configuration
 
 - **Repo-Struktur**: Monorepo mit `frontend/` (SvelteKit) und `backend/`
diff --git a/frontend/src/lib/components/IconPicker.svelte b/frontend/src/lib/components/IconPicker.svelte
index 3b82026..7132add 100644
--- a/frontend/src/lib/components/IconPicker.svelte
+++ b/frontend/src/lib/components/IconPicker.svelte
@@ -8,6 +8,7 @@
      * beide dieselbe Auswahl zeigen.
      */
     import FlagIcon from './FlagIcon.svelte'
+    import { tooltip } from '$lib/stores/app.svelte'
     import { FLAG_ICON_SUGGESTIONS, iconExists } from '$lib/flagIcons'
     import { Input } from '@/components/ui/input'
     import { Label } from '@/components/ui/label'
@@ -48,8 +49,8 @@
         {#each FLAG_ICON_SUGGESTIONS as name (name)}
             <button
                 type="button"
-                title={name}
                 aria-label={name}
+                use:tooltip={{ content: name }}
                 aria-pressed={value === name}
                 class="grid place-items-center rounded-md p-1.5 hover:bg-accent"
                 class:bg-accent={value === name}
diff --git a/frontend/src/lib/components/RunningTimesToast.svelte b/frontend/src/lib/components/RunningTimesToast.svelte
index 84095ed..8771cb2 100644
--- a/frontend/src/lib/components/RunningTimesToast.svelte
+++ b/frontend/src/lib/components/RunningTimesToast.svelte
@@ -92,7 +92,7 @@
                         variant="ghost"
                         size="icon"
                         class="ml-auto size-7 shrink-0"
-                        title={expanded ? 'Einklappen' : 'Alle anzeigen'}
+                        tooltip={expanded ? 'Einklappen' : 'Alle anzeigen'}
                         onclick={() => (expanded = !expanded)}
                     >
                         {#if expanded}
@@ -128,7 +128,7 @@
                                 variant="ghost"
                                 size="icon"
                                 class="shrink-0"
-                                title="Zeit erfassen"
+                                tooltip="Zeit erfassen"
                                 onclick={() => openTimeDialog(t.rider, t.run)}
                             >
                                 <Timer class="size-4" />
diff --git a/frontend/src/lib/components/ui/button/button.svelte b/frontend/src/lib/components/ui/button/button.svelte
index 89cedcb..46e930b 100644
--- a/frontend/src/lib/components/ui/button/button.svelte
+++ b/frontend/src/lib/components/ui/button/button.svelte
@@ -38,10 +38,18 @@
 		WithElementRef<HTMLAnchorAttributes> & {
 			variant?: ButtonVariant;
 			size?: ButtonSize;
+			/**
+			 * Hinweistext als Tooltip. Ersetzt `title` appweit und dient
+			 * zugleich als Beschriftung, wenn der Knopf nur ein Icon zeigt —
+			 * ohne das bliebe er für Screenreader namenlos.
+			 */
+			tooltip?: string;
 		};
 </script>
 
 <script lang="ts">
+	import { tooltip as tooltipAction } from "$lib/stores/app.svelte";
+
 	let {
 		class: className,
 		variant = "default",
@@ -50,6 +58,7 @@
 		href = undefined,
 		type = "button",
 		disabled,
+		tooltip,
 		children,
 		...restProps
 	}: ButtonProps = $props();
@@ -64,7 +73,9 @@
 		aria-disabled={disabled}
 		role={disabled ? "link" : undefined}
 		tabindex={disabled ? -1 : undefined}
+		aria-label={tooltip}
 		{...restProps}
+		use:tooltipAction={{ content: tooltip }}
 	>
 		{@render children?.()}
 	</a>
@@ -75,7 +86,9 @@
 		class={cn(buttonVariants({ variant, size }), className)}
 		{type}
 		{disabled}
+		aria-label={tooltip}
 		{...restProps}
+		use:tooltipAction={{ content: tooltip }}
 	>
 		{@render children?.()}
 	</button>
diff --git a/frontend/src/lib/stores/app.svelte.ts b/frontend/src/lib/stores/app.svelte.ts
index b90cf05..8758b99 100644
--- a/frontend/src/lib/stores/app.svelte.ts
+++ b/frontend/src/lib/stores/app.svelte.ts
@@ -160,20 +160,46 @@ export const utils = {
     },
 }
 
+/**
+ * Tooltip für ein Element. Appweit die einzige Art, einen Hinweis an einen
+ * Knopf zu hängen — `title` überlassen wir dem Browser nicht mehr: Es
+ * erscheint erst nach einer Sekunde, sieht auf jedem System anders aus und
+ * lässt sich auf Touch-Geräten gar nicht aufrufen.
+ *
+ * Die Action beherrscht Aktualisieren und Aufräumen: Ein Text, der sich
+ * ändert (»Erledigt« / »Wieder öffnen«), muss auch im Tooltip wechseln, und
+ * eine Instanz, die ein entferntes Element überlebt, hinge als leere Blase
+ * im Dokument.
+ */
 export const tooltip = (
     element: HTMLElement,
-    props: { active?: boolean; content?: string; showOnCreate?: boolean },
+    props: { active?: boolean; content?: string; showOnCreate?: boolean } = {},
 ) => {
-    let defaultProps = {
-        active: true,
+    const options = (p: typeof props) => ({
         animation: 'shift-toward-subtle',
-        allowHTML: true,
+        allowHTML: false,
+        content: p.content ?? '',
+        showOnCreate: p.showOnCreate,
+    })
+
+    const wanted = (p: typeof props) => p.active !== false && !!p.content?.trim()
+
+    let instance = wanted(props) ? tippy(element, options(props)) : null
+
+    return {
+        update(next: typeof props) {
+            if (!wanted(next)) {
+                instance?.destroy()
+                instance = null
+                return
+            }
+
+            if (instance) instance.setProps(options(next))
+            else instance = tippy(element, options(next))
+        },
+        destroy() {
+            instance?.destroy()
+            instance = null
+        },
     }
-    props = {...defaultProps, ...props}
-    if (props.showOnCreate) {
-        props = {
-            ...props,
-        }
-    }
-    if (props.active) tippy(element, props)
 }
diff --git a/frontend/src/routes/dashboard/+layout.svelte b/frontend/src/routes/dashboard/+layout.svelte
index 2662b5a..121c58d 100644
--- a/frontend/src/routes/dashboard/+layout.svelte
+++ b/frontend/src/routes/dashboard/+layout.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
     import { auth } from '$lib/stores/pocketbase.svelte'
     import { goto } from '$app/navigation'
-    import { app } from '$lib/stores/app.svelte'
+    import { app, tooltip } from '$lib/stores/app.svelte'
     import { setTeamContext } from '$lib/stores/teams.svelte'
     import { setEventContext } from '$lib/stores/events.svelte'
     import { setRunContext } from '$lib/stores/runs.svelte'
@@ -146,8 +146,8 @@
                             <div class="flex items-center justify-between gap-3">
                                 <a
                                     href="/dashboard/settings"
-                                    title="Profil"
                                     class="flex min-w-0 items-center gap-2"
+                                    use:tooltip={{ content: 'Profil' }}
                                 >
                                     <Avatar user={auth.user} size={24} />
                                     <span class="truncate text-sm font-medium leading-none">
@@ -161,7 +161,7 @@
                                         size="icon"
                                         class="size-7"
                                         onclick={toggleMode}
-                                        title="Design wechseln"
+                                        tooltip="Design wechseln"
                                     >
                                         {#if mode.current === 'dark'}
                                             <Sun class="h-4 w-4" />
@@ -174,7 +174,7 @@
                                         size="icon"
                                         class="size-7"
                                         onclick={handleLogout}
-                                        title="Abmelden"
+                                        tooltip="Abmelden"
                                     >
                                         <LogOut class="h-4 w-4" />
                                     </Button>
@@ -191,7 +191,7 @@
                             size="icon"
                             class="md:hidden"
                             onclick={() => (isMobileMenuOpen = !isMobileMenuOpen)}
-                            title="Menü"
+                            tooltip="Menü"
                         >
                             {#if isMobileMenuOpen}
                                 <X class="h-4 w-4" />
@@ -229,14 +229,14 @@
                                 <TeamSwitcher />
                             </div>
                             <div class="flex items-center gap-1 shrink-0">
-                                <Button variant="ghost" size="icon" onclick={toggleMode} title="Design wechseln">
+                                <Button variant="ghost" size="icon" onclick={toggleMode} tooltip="Design wechseln">
                                     {#if mode.current === 'dark'}
                                         <Sun class="h-4 w-4" />
                                     {:else}
                                         <Moon class="h-4 w-4" />
                                     {/if}
                                 </Button>
-                                <Button variant="ghost" size="icon" onclick={handleLogout} title="Abmelden">
+                                <Button variant="ghost" size="icon" onclick={handleLogout} tooltip="Abmelden">
                                     <LogOut class="h-4 w-4" />
                                 </Button>
                             </div>
diff --git a/frontend/src/routes/dashboard/events/+page.svelte b/frontend/src/routes/dashboard/events/+page.svelte
index 3e87e46..ded6452 100644
--- a/frontend/src/routes/dashboard/events/+page.svelte
+++ b/frontend/src/routes/dashboard/events/+page.svelte
@@ -142,10 +142,10 @@
                                     </CardContent>
                                 </a>
                                 <div class="px-6 pb-4 flex items-center justify-end gap-1 border-t pt-3">
-                                    <Button variant="ghost" size="icon" onclick={() => openEdit(event)} title="Bearbeiten">
+                                    <Button variant="ghost" size="icon" onclick={() => openEdit(event)} tooltip="Bearbeiten">
                                         <Pencil class="h-4 w-4" />
                                     </Button>
-                                    <Button variant="ghost" size="icon" onclick={() => events.remove(event)} title="Löschen">
+                                    <Button variant="ghost" size="icon" onclick={() => events.remove(event)} tooltip="Löschen">
                                         <Trash2 class="h-4 w-4 text-destructive" />
                                     </Button>
                                 </div>
diff --git a/frontend/src/routes/dashboard/settings/riders/+page.svelte b/frontend/src/routes/dashboard/settings/riders/+page.svelte
index cdd020d..10fa7d3 100644
--- a/frontend/src/routes/dashboard/settings/riders/+page.svelte
+++ b/frontend/src/routes/dashboard/settings/riders/+page.svelte
@@ -229,18 +229,18 @@
                                     </Table.Cell>
                                     <Table.Cell class="text-right whitespace-nowrap">
                                         {#if r.user}
-                                            <Button variant="ghost" size="icon" title="Verknüpfung lösen" onclick={() => doUnlink(r)}>
+                                            <Button variant="ghost" size="icon" tooltip="Verknüpfung lösen" onclick={() => doUnlink(r)}>
                                                 <Unlink class="size-4" />
                                             </Button>
                                         {:else}
-                                            <Button variant="ghost" size="icon" title="Konto verknüpfen" onclick={() => openLogin(r)}>
+                                            <Button variant="ghost" size="icon" tooltip="Konto verknüpfen" onclick={() => openLogin(r)}>
                                                 <KeyRound class="size-4" />
                                             </Button>
                                         {/if}
-                                        <Button variant="ghost" size="icon" title="Bearbeiten" onclick={() => openEdit(r)}>
+                                        <Button variant="ghost" size="icon" tooltip="Bearbeiten" onclick={() => openEdit(r)}>
                                             <Pencil class="size-4" />
                                         </Button>
-                                        <Button variant="ghost" size="icon" title="Löschen" onclick={() => riders.remove(r)}>
+                                        <Button variant="ghost" size="icon" tooltip="Löschen" onclick={() => riders.remove(r)}>
                                             <Trash2 class="size-4 text-destructive" />
                                         </Button>
                                     </Table.Cell>
diff --git a/frontend/src/routes/dashboard/settings/team/+page.svelte b/frontend/src/routes/dashboard/settings/team/+page.svelte
index 8dd40ec..e1f3d1c 100644
--- a/frontend/src/routes/dashboard/settings/team/+page.svelte
+++ b/frontend/src/routes/dashboard/settings/team/+page.svelte
@@ -244,7 +244,7 @@
                                     Verlassen
                                 </Button>
                             {:else}
-                                <Button variant="ghost" size="icon" title="Team löschen" onclick={() => teams.remove(t)}>
+                                <Button variant="ghost" size="icon" tooltip="Team löschen" onclick={() => teams.remove(t)}>
                                     <Trash2 class="size-4 text-destructive" />
                                 </Button>
                             {/if}
@@ -286,7 +286,7 @@
                                                 Zu Admin
                                             </Button>
                                         {/if}
-                                        <Button variant="ghost" size="icon" title="Entfernen" onclick={() => doRemoveMember(t, userId)}>
+                                        <Button variant="ghost" size="icon" tooltip="Entfernen" onclick={() => doRemoveMember(t, userId)}>
                                             <UserMinus class="size-4 text-destructive" />
                                         </Button>
                                     </div>
diff --git a/frontend/src/routes/dashboard/trails/+page.svelte b/frontend/src/routes/dashboard/trails/+page.svelte
index 33ed96d..a03ba9d 100644
--- a/frontend/src/routes/dashboard/trails/+page.svelte
+++ b/frontend/src/routes/dashboard/trails/+page.svelte
@@ -5,6 +5,7 @@
     import { getTrailMarkerContext } from '$lib/stores/trailMarkers.svelte'
     import TrailMap from '$lib/components/TrailMap.svelte'
     import { trailStatus } from '$lib/trailStatus'
+    import { tooltip } from '$lib/stores/app.svelte'
     import { getTrailCommentContext } from '$lib/stores/trailComments.svelte'
     import { Button } from '@/components/ui/button'
     import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
@@ -160,7 +161,9 @@
                                 {#if open > 0}
                                     <span
                                         class="flex items-center gap-1 text-amber-600 ml-auto"
-                                        title="{open} offene Meldung{open === 1 ? '' : 'en'}"
+                                        use:tooltip={{
+                                            content: `${open} offene Meldung${open === 1 ? '' : 'en'}`,
+                                        }}
                                     >
                                         <AlertTriangle class="size-4" />
                                         {open}
@@ -177,9 +180,11 @@
                                     class="flex items-center gap-1.5"
                                     class:text-muted-foreground={!freshMarkers}
                                     class:font-medium={freshMarkers}
-                                    title={freshMarkers
-                                        ? `Marker, neue in den letzten ${RECENT_DAYS} Tagen`
-                                        : 'Marker'}
+                                    use:tooltip={{
+                                        content: freshMarkers
+                                            ? `Marker, neue in den letzten ${RECENT_DAYS} Tagen`
+                                            : 'Marker',
+                                    }}
                                 >
                                     <MapPin class="size-4" />
                                     {markerCount}
@@ -191,9 +196,11 @@
                                     class="flex items-center gap-1.5"
                                     class:text-muted-foreground={!freshComments}
                                     class:font-medium={freshComments}
-                                    title={freshComments
-                                        ? `Kommentare, neue in den letzten ${RECENT_DAYS} Tagen`
-                                        : 'Kommentare'}
+                                    use:tooltip={{
+                                        content: freshComments
+                                            ? `Kommentare, neue in den letzten ${RECENT_DAYS} Tagen`
+                                            : 'Kommentare',
+                                    }}
                                 >
                                     <MessageSquare class="size-4" />
                                     {commentCount}
diff --git a/frontend/src/routes/dashboard/trails/[id]/+page.svelte b/frontend/src/routes/dashboard/trails/[id]/+page.svelte
index 817840c..f1ab12e 100644
--- a/frontend/src/routes/dashboard/trails/[id]/+page.svelte
+++ b/frontend/src/routes/dashboard/trails/[id]/+page.svelte
@@ -459,7 +459,7 @@
                                                     variant="ghost"
                                                     size="icon"
                                                     class="size-8"
-                                                    title={m.resolved ? 'Wieder öffnen' : 'Als erledigt markieren'}
+                                                    tooltip={m.resolved ? 'Wieder öffnen' : 'Als erledigt markieren'}
                                                     onclick={async () => {
                                                         try {
                                                             await markers.toggleResolved(m.id)
@@ -474,7 +474,7 @@
                                                     variant="ghost"
                                                     size="icon"
                                                     class="size-8"
-                                                    title="Marker löschen"
+                                                    tooltip="Marker löschen"
                                                     onclick={() => removeMarker(m)}
                                                 >
                                                     <Trash2 class="size-4 text-destructive" />
@@ -583,7 +583,7 @@
                                             </div>
 
                                             {#if v.gpx}
-                                                <Button variant="ghost" size="icon" class="size-8" href={getFileURL(v, v.gpx)} title="GPX herunterladen">
+                                                <Button variant="ghost" size="icon" class="size-8" href={getFileURL(v, v.gpx)} tooltip="GPX herunterladen">
                                                     <Download class="size-4" />
                                                 </Button>
                                             {/if}