fix(ui): handle Windows paths in tab titles

packages/ui/src/components/instance-tab.tsx

@@ -11,20 +11,11 @@ interface InstanceTabProps {
   onClose: () => void
 }
 
-function formatFolderName(path: string, instances: Instance[], currentInstance: Instance): string {
-  const name = path.split("/").pop() || path
-
-  const duplicates = instances.filter((i) => {
-    const iName = i.folder.split("/").pop() || i.folder
-    return iName === name
-  })
-
-  if (duplicates.length > 1) {
-    const index = duplicates.findIndex((i) => i.id === currentInstance.id)
-    return `~/${name} (${index + 1})`
-  }
-
-  return `~/${name}`
+function getPathBasename(path: string): string {
+  // Instance folders can be POSIX-like (/Users/...) on macOS/Linux or Windows-like (C:\Users\...).
+  // Normalize by trimming trailing separators and then splitting on both '/' and '\\'.
+  const normalized = path.replace(/[\\/]+$/, "")
+  return normalized.split(/[\\/]/).pop() || path
 }
 
 const InstanceTab: Component<InstanceTabProps> = (props) => {
@@ -58,7 +49,7 @@ const InstanceTab: Component<InstanceTabProps> = (props) => {
       >
         <FolderOpen class="w-4 h-4 flex-shrink-0" />
         <span class="tab-label">
-          {props.instance.folder.split("/").pop() || props.instance.folder}
+          {getPathBasename(props.instance.folder)}
         </span>
         <span
           class={`status-indicator session-status ml-auto ${statusClassName()}`}

packages/ui/src/styles/markdown.css

@@ -1,4 +1,4 @@
-@import "github-markdown-css/github-markdown-light.css" layer(github-markdown-base);
+@import "github-markdown-css/github-markdown-dark.css";
 
 @layer components {
   .markdown-body {
@@ -96,7 +96,6 @@
   .markdown-body code {
     font-family: var(--font-family-mono);
     font-size: var(--font-size-sm);
-    color: var(--text-primary);
     background-color: var(--surface-muted);
     border: 1px solid var(--border-base);
     border-radius: 4px;
@@ -109,23 +108,17 @@
     background: transparent;
   }
 
-  .markdown-body pre:not(.shiki) {
+  .markdown-body pre {
     font-family: var(--font-family-mono);
     font-size: var(--font-size-sm);
     line-height: var(--line-height-normal);
     background-color: var(--surface-code);
-    color: var(--text-primary);
     border: 1px solid var(--border-base);
     border-radius: 8px;
     padding: 0.75rem;
     margin: 1rem 0;
   }
 
-  .markdown-body pre:not(.shiki) code,
-  .markdown-code-block pre:not(.shiki) code {
-    color: var(--text-primary);
-  }
-
   .markdown-body blockquote {
     border-left: 3px solid var(--border-base);
     color: var(--text-secondary);
@@ -175,18 +168,12 @@
     border: 1px solid var(--border-base);
     padding: 0.5rem 0.75rem;
     text-align: left;
-    color: var(--text-primary);
-    background-color: transparent;
   }
 
   .markdown-body th {
     background-color: var(--surface-secondary);
   }
 
-  .markdown-body tbody tr:nth-child(2n) {
-    background-color: var(--surface-muted);
-  }
-
   .markdown-code-block {
     position: relative;
     margin: 10px 0;