refactor(settings): reorganize appearance section into folder

- Move appearance-section.tsx into appearance/ folder
- Move theme-options.ts into appearance/config/
- Update import paths in appearance-section.tsx
- Update settings-view.tsx to import from new location
- All TypeScript diagnostics passing
- Follows api-keys folder pattern

app/src/components/views/settings-view.tsx

@@ -34,7 +34,7 @@ import {
   ClaudeCliStatus,
   CodexCliStatus,
 } from "./settings-view/cli-status-section";
-import { AppearanceSection } from "./settings-view/appearance-section";
+import { AppearanceSection } from "./settings-view/appearance/appearance-section";
 import { KanbanDisplaySection } from "./settings-view/kanban-display-section";
 import { KeyboardShortcutsSection } from "./settings-view/keyboard-shortcuts-section";
 import { FeatureDefaultsSection } from "./settings-view/feature-defaults-section";

app/src/components/views/settings-view/appearance/appearance-section.tsx

@@ -0,0 +1,61 @@
+import { Button } from "@/components/ui/button";
+import { Label } from "@/components/ui/label";
+import { Palette } from "lucide-react";
+import { themeOptions } from "./config/theme-options";
+import type { Theme, Project } from "../types";
+
+interface AppearanceSectionProps {
+  effectiveTheme: Theme;
+  currentProject: Project | null;
+  onThemeChange: (theme: Theme) => void;
+}
+
+export function AppearanceSection({
+  effectiveTheme,
+  currentProject,
+  onThemeChange,
+}: AppearanceSectionProps) {
+  return (
+    <div
+      id="appearance"
+      className="rounded-xl border border-border bg-card backdrop-blur-md overflow-hidden scroll-mt-6"
+    >
+      <div className="p-6 border-b border-border">
+        <div className="flex items-center gap-2 mb-2">
+          <Palette className="w-5 h-5 text-brand-500" />
+          <h2 className="text-lg font-semibold text-foreground">Appearance</h2>
+        </div>
+        <p className="text-sm text-muted-foreground">
+          Customize the look and feel of your application.
+        </p>
+      </div>
+      <div className="p-6 space-y-4">
+        <div className="space-y-3">
+          <Label className="text-foreground">
+            Theme{" "}
+            {currentProject ? `(for ${currentProject.name})` : "(Global)"}
+          </Label>
+          <div className="grid grid-cols-2 md:grid-cols-4 gap-3">
+            {themeOptions.map(({ value, label, Icon, testId }) => {
+              const isActive = effectiveTheme === value;
+              return (
+                <Button
+                  key={value}
+                  variant={isActive ? "secondary" : "outline"}
+                  onClick={() => onThemeChange(value)}
+                  className={`flex items-center justify-center gap-2 px-3 py-3 h-auto ${
+                    isActive ? "border-brand-500 ring-1 ring-brand-500/50" : ""
+                  }`}
+                  data-testid={testId}
+                >
+                  <Icon className="w-4 h-4" />
+                  <span className="font-medium text-sm">{label}</span>
+                </Button>
+              );
+            })}
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}

app/src/components/views/settings-view/appearance/config/theme-options.ts

@@ -0,0 +1,88 @@
+import {
+  type LucideIcon,
+  Atom,
+  Cat,
+  Eclipse,
+  Flame,
+  Ghost,
+  Moon,
+  Radio,
+  Snowflake,
+  Sparkles,
+  Sun,
+  Terminal,
+  Trees,
+} from "lucide-react";
+import { Theme } from "../types";
+
+export interface ThemeOption {
+  value: Theme;
+  label: string;
+  Icon: LucideIcon;
+  testId: string;
+}
+
+export const themeOptions: ReadonlyArray<ThemeOption> = [
+  { value: "dark", label: "Dark", Icon: Moon, testId: "dark-mode-button" },
+  { value: "light", label: "Light", Icon: Sun, testId: "light-mode-button" },
+  {
+    value: "retro",
+    label: "Retro",
+    Icon: Terminal,
+    testId: "retro-mode-button",
+  },
+  {
+    value: "dracula",
+    label: "Dracula",
+    Icon: Ghost,
+    testId: "dracula-mode-button",
+  },
+  {
+    value: "nord",
+    label: "Nord",
+    Icon: Snowflake,
+    testId: "nord-mode-button",
+  },
+  {
+    value: "monokai",
+    label: "Monokai",
+    Icon: Flame,
+    testId: "monokai-mode-button",
+  },
+  {
+    value: "tokyonight",
+    label: "Tokyo Night",
+    Icon: Sparkles,
+    testId: "tokyonight-mode-button",
+  },
+  {
+    value: "solarized",
+    label: "Solarized",
+    Icon: Eclipse,
+    testId: "solarized-mode-button",
+  },
+  {
+    value: "gruvbox",
+    label: "Gruvbox",
+    Icon: Trees,
+    testId: "gruvbox-mode-button",
+  },
+  {
+    value: "catppuccin",
+    label: "Catppuccin",
+    Icon: Cat,
+    testId: "catppuccin-mode-button",
+  },
+  {
+    value: "onedark",
+    label: "One Dark",
+    Icon: Atom,
+    testId: "onedark-mode-button",
+  },
+  {
+    value: "synthwave",
+    label: "Synthwave",
+    Icon: Radio,
+    testId: "synthwave-mode-button",
+  },
+];