feat(renderer): redesign model setup dialog with tokenized ui primitives

design/model-setup-dialog/v1/README.md

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+# Model Setup Dialog Design v1
+
+## Scope
+- Improve selected-state clarity for provider cards.
+- Unify selected ring and check colors with primary action color.
+- Replace hardcoded red error/close-hover colors with MAI danger tokens.
+
+## Decisions
+- Selected card keeps a single visible selected border layer.
+- Selected fill matches hover fill to avoid a blue tint bias.
+- Error text and close-hover danger visuals use semantic tokens:
+  - --smtc-status-danger-foreground
+  - --smtc-status-danger-background
+
+## Files Updated
+- desktop/renderer/src/components/ModelSetupDialog.vue
+- desktop/renderer/src/components/GatewayLoading.vue
+- desktop/renderer/src/App.vue
+- desktop/renderer/src/styles/global.css
+- desktop/renderer/src/views/ChatView.vue
+
+## Notes
+- This version is intended for design iteration and review on branch design/model-setup-dialog/v1.

desktop/renderer/.storybook/main.ts

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+import type { StorybookConfig } from "@storybook/vue3-vite";
+
+const config: StorybookConfig = {
+  stories: ["../src/**/*.stories.@(js|jsx|mjs|ts|tsx)"],
+  addons: [
+    "@storybook/addon-essentials",
+    "@storybook/addon-interactions",
+    "@storybook/addon-a11y",
+  ],
+  framework: {
+    name: "@storybook/vue3-vite",
+    options: {},
+  },
+  docs: {
+    autodocs: "tag",
+  },
+};
+
+export default config;

desktop/renderer/.storybook/preview.ts

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+import type { Preview } from "@storybook/vue3";
+import "../src/styles/global.css";
+
+const preview: Preview = {
+  parameters: {
+    controls: {
+      matchers: {
+        color: /(background|color)$/i,
+        date: /Date$/i,
+      },
+    },
+    layout: "centered",
+  },
+};
+
+export default preview;