Add keyboard mode toggle and QR scanner improvements

- Add keyboard mode toggle button (⇧K) in sidebar
- Triple-Escape to quickly exit keyboard mode
- Extract QrScannerModal to shared component
- Add QR scanner for NWC wallet connection in Settings
- Update Help page with keyboard toggle documentation
- Fix keyboard navigation getting stuck on inbox
- Improve feed loading after login (loads immediately)
- DM conversation page layout improvements

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/StuffStats/RepostButton.tsx

@@ -77,11 +77,11 @@ export default function RepostButton({ stuff }: { stuff: Event | string }) {
   const trigger = (
     <button
       className={cn(
-        'flex gap-1 items-center px-3 h-full enabled:hover:text-lime-500 disabled:text-muted-foreground/40',
+        'flex gap-1 items-center px-3 h-full enabled:hover:text-lime-500 disabled:text-muted-foreground/40 group',
         hasReposted ? 'text-lime-500' : 'text-muted-foreground'
       )}
       disabled={!event}
-      title={t('Repost')}
+      title={t('Repost (p) / Quote (q)')}
       data-action="repost"
       onClick={() => {
         if (!event) return
@@ -91,7 +91,10 @@ export default function RepostButton({ stuff }: { stuff: Event | string }) {
         }
       }}
     >
-      {reposting ? <Loader className="animate-spin" /> : <Repeat />}
+      <span className="relative">
+        {reposting ? <Loader className="animate-spin" /> : <Repeat />}
+        <kbd className="absolute -top-1.5 -right-2 text-[9px] font-mono opacity-50 group-hover:opacity-100">p</kbd>
+      </span>
       {!!repostCount && <div className="text-sm">{formatCount(repostCount)}</div>}
     </button>
   )
@@ -108,10 +111,25 @@ export default function RepostButton({ stuff }: { stuff: Event | string }) {
     />
   )
 
+  // Hidden button for keyboard shortcut (q for quote)
+  const quoteButton = (
+    <button
+      className="hidden"
+      data-action="quote"
+      onClick={(e) => {
+        e.stopPropagation()
+        checkLogin(() => {
+          setIsPostDialogOpen(true)
+        })
+      }}
+    />
+  )
+
   if (isSmallScreen) {
     return (
       <>
         {trigger}
+        {quoteButton}
         <Drawer open={isDrawerOpen} onOpenChange={setIsDrawerOpen}>
           <DrawerOverlay onClick={() => setIsDrawerOpen(false)} />
           <DrawerContent hideOverlay>
@@ -170,12 +188,12 @@ export default function RepostButton({ stuff }: { stuff: Event | string }) {
                 setIsPostDialogOpen(true)
               })
             }}
-            data-action="quote"
           >
             <PencilLine /> {t('Quote')}
           </DropdownMenuItem>
         </DropdownMenuContent>
       </DropdownMenu>
+      {quoteButton}
       {postEditor}
     </>
   )