Merge feature/timeline into main

src/lib/layout/TopBar.svelte

@@ -20,7 +20,6 @@
 
 <div class="topbar">
   <div class="left">
-    <img src="/logo.png" alt="Logo" class="logo" />
     <span class="app-name">Map Journal</span>
   </div>
 
@@ -66,15 +65,16 @@
 
 <style>
   .topbar {
-    height: 64px;
+    height: 52px;
     display: flex;
     align-items: center;
-    padding: 0 24px;
-    background: #1e2937;
+    padding: 0 32px;
     gap: 16px;
     position: relative;
     z-index: 10;
-    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
+    border-bottom: 1px solid var(--border);
+    background: var(--bg);
+    flex-shrink: 0;
   }
 
   .left {
@@ -83,17 +83,11 @@
     gap: 10px;
   }
 
-  .logo {
-    width: 75px;
-    height: 75px;
-    border-radius: 10px;
-    object-fit: cover;
-    flex-shrink: 0;
-  }
-
   .app-name {
-    font: 700 20px/1.2 sans-serif;
-    color: #f1f5f9;
+    font-family: var(--heading);
+    font-size: 14px;
+    font-weight: 400;
+    color: var(--text-h);
     white-space: nowrap;
   }
 
@@ -106,20 +100,21 @@
   .segmented {
     position: relative;
     display: flex;
-    background: rgba(255, 255, 255, 0.1);
-    border-radius: 999px;
-    padding: 4px;
-    width: 300px;
+    background: var(--bg-subtle);
+    border: 1px solid var(--border);
+    border-radius: 8px;
+    padding: 3px;
   }
 
   .slider {
     position: absolute;
-    top: 4px;
-    left: 4px;
-    width: calc(50% - 4px);
-    height: calc(100% - 8px);
-    background: #fff;
-    border-radius: 999px;
+    top: 3px;
+    left: 3px;
+    width: calc(50% - 3px);
+    height: calc(100% - 6px);
+    background: var(--bg);
+    border-radius: 6px;
+    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
     transition: transform 0.25s ease;
     pointer-events: none;
   }
@@ -128,12 +123,15 @@
     position: relative;
     z-index: 1;
     flex: 1;
-    padding: 10px 20px;
+    padding: 4px 18px;
     border: none;
     background: none;
     cursor: pointer;
-    font: 500 16px/1.4 sans-serif;
-    color: #cbd5e1;
+    font-family: var(--sans);
+    font-size: 13px;
+    font-weight: 300;
+    color: var(--text);
+    letter-spacing: 0.01em;
   }
 
   .right {
@@ -155,8 +153,8 @@
   }
 
   .avatar {
-    width: 45px;
-    height: 45px;
+    width: 32px;
+    height: 32px;
     border-radius: 50%;
     object-fit: cover;
     flex-shrink: 0;
@@ -166,12 +164,12 @@
     position: absolute;
     top: calc(100% + 8px);
     right: 0;
-    background: #1e2937;
-    border: 1px solid #334155;
+    background: var(--bg);
+    border: 1px solid var(--border);
     border-radius: 10px;
     padding: 8px 0;
     min-width: 200px;
-    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
+    box-shadow: var(--shadow);
     z-index: 50;
   }
 
@@ -184,17 +182,17 @@
 
   .menu-name {
     font: 600 14px/1.3 sans-serif;
-    color: #f1f5f9;
+    color: var(--text-h);
   }
 
   .menu-email {
     font: 400 12px/1.3 sans-serif;
-    color: #94a3b8;
+    color: var(--text-sub);
   }
 
   .divider {
     height: 1px;
-    background: #334155;
+    background: var(--border);
     margin: 6px 0;
   }
 
@@ -205,13 +203,13 @@
     background: none;
     text-align: left;
     font: 400 14px/1.4 sans-serif;
-    color: #fca5a5;
+    color: #ef4444;
     cursor: pointer;
     transition: background 0.15s;
   }
 
   .menu-item:hover {
-    background: rgba(255, 255, 255, 0.05);
+    background: var(--bg-subtle);
   }
 
   .backdrop {