style: mule ASCII placeholder in sidebar, bump muted text contrast

Replace Info icon with braille mule art in the right sidebar empty
state. Lighten text-muted (#a8997d → #c4b599) and text-faint
(#5e5448 → #7a6e5e) for better readability across the app.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/layout/RightSidebar.tsx

@@ -1,5 +1,5 @@
 import { useState } from 'react'
-import { X, Star, Info, ShoppingBasket, Trash2, Plus, PanelRightClose } from 'lucide-react'
+import { X, Star, ShoppingBasket, Trash2, Plus, PanelRightClose } from 'lucide-react'
 import clsx from 'clsx'
 import { useMutation, useQueryClient } from '@tanstack/react-query'
 import { usePhotoStore } from '../../store/photoStore'
@@ -192,7 +192,21 @@ export function RightSidebar({ onCollapse }: RightSidebarProps) {
         <Header />
         <div className="flex flex-1 items-center justify-center p-4 text-center">
           <div className="text-text-muted">
-            <Info className="mx-auto mb-2 h-8 w-8" />
+            <pre className="mx-auto mb-3 text-[6px] leading-[6px] opacity-30">{`⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣰⣿⡇⠀⣠⣤⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⣿⣿⡇⢸⣿⡟⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢰⣿⣿⡿⠀⣿⡿⠁⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⠃⣼⡟⠁⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⣀⣀⣀⣤⣶⣿⣿⣿⣧⣀⠋⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠠⣴⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⡄⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⢀⡀⣶⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⠛⠻⣿⣿⡄⠀⠀⠀⠀⠀
+⠀⠀⢠⣼⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣶⣿⣿⣷⡀⠀⠀⠀⠀⠀
+⣠⣤⣿⣿⣿⣿⣿⣿⣿⣿⡿⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡀⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⠘⢿⣿⣿⣿⣿⣿⣿⣿⢿⡆⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠁⠀⠙⠛⠿⠿⣿⣿⠿⣾⡇⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⠁⠀⠀⠀⠀⠀⠀⠹⣿⡿⣦⠈⠁⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠛⠛⠛⠛⠛⠛⠛⠛⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀`}</pre>
             <p className="text-sm">Select photos to view details</p>
           </div>
         </div>

frontend/src/index.css

@@ -10,8 +10,8 @@
     --color-surface-offset: #352c46;
     --color-border: rgba(240, 193, 136, 0.10);
     --color-text: #f0e6d2;
-    --color-text-muted: #a8997d;
+    --color-text-muted: #c4b599;
-    --color-text-faint: #5e5448;
+    --color-text-faint: #7a6e5e;
     --color-primary: #e8965a;
     --color-pick: #8aaa5a;
     --color-reject: #d06464;