more targeted refresh

src/components/common/RefreshHotkey.svelte

@@ -6,7 +6,8 @@
    * navigating, and editable controls are ignored so composing text is safe.
    */
   interface Props {
-    onrefresh?: () => void
+    /** Returning false means this page has no refreshable timeline. */
+    onrefresh?: () => void | boolean
   }
 
   let { onrefresh = () => window.location.reload() }: Props = $props()
@@ -35,8 +36,8 @@
       return
     }
 
-    event.preventDefault()
-    onrefresh()
+    const handled = onrefresh()
+    if (handled !== false) event.preventDefault()
   }
 </script>
 

src/components/common/RefreshHotkey.test.ts

@@ -33,4 +33,18 @@ describe('RefreshHotkey', () => {
 
     expect(onrefresh).not.toHaveBeenCalled()
   })
+
+  it('leaves the shortcut unclaimed when the page has no timeline', () => {
+    render(RefreshHotkey, { props: { onrefresh: () => false } })
+    const event = new KeyboardEvent('keydown', {
+      key: 'R',
+      shiftKey: true,
+      bubbles: true,
+      cancelable: true,
+    })
+
+    window.dispatchEvent(event)
+
+    expect(event.defaultPrevented).toBe(false)
+  })
 })