feat(themes): Built-in Solarized and One light/dark themes (#85)

Adds Solarized Light, Solarized Dark, One Light and One Dark as built-in themes across the workbench, editor, terminal and Mermaid, keeping the original palettes (MIT notices in THIRD_PARTY_LICENSES.md, mapping in docs/themes.md).

- Native window colours are read from tokens.css at build time (`theme_frame.rs`) instead of a second colour table.
- Startup restores the built-in palette before first paint.
- Editor schemes, the terminal and Mermaid refresh on switches between themes of the same kind.
- The plugin packages of the same themes are removed.
- A test requires every built-in palette theme to define each token (only listed ones may inherit from the base theme), so new tokens can't silently miss them.

Co-authored-by: Claude <[email protected]>
Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn

src/features/plugins/__tests__/plugins.test.tsx

@@ -144,8 +144,8 @@ describe("store", () => {
 
   it("selects and clears a plugin theme", async () => {
     await refreshPlugins();
-    await selectPluginTheme("theme-solarized", "solarized-dark");
-    expect(usePlugins.getState().activeTheme?.theme.id).toBe("solarized-dark");
+    await selectPluginTheme("theme-harbor-night", "harbor-night");
+    expect(usePlugins.getState().activeTheme?.theme.id).toBe("harbor-night");
     await selectPluginTheme(null, null);
     expect(usePlugins.getState().activeTheme).toBeNull();
   });
@@ -238,8 +238,8 @@ describe("PluginsPage", () => {
     await waitFor(() => expect(screen.getByRole("checkbox", { name: "Enable Hello" })).toBeInTheDocument());
     expect(screen.getByRole("button", { name: "Run Hello: Insert Date" })).toBeDisabled();
 
-    await user.click(within(list).getByText("Solarized Themes"));
-    await user.click(screen.getByRole("button", { name: "Apply theme Solarized Dark" }));
+    await user.click(within(list).getByText("Harbor Night Theme"));
+    await user.click(screen.getByRole("button", { name: "Apply theme Harbor Night" }));
     await waitFor(() => expect(screen.getByRole("button", { name: "Use Default Theme" })).toBeInTheDocument());
 
     await user.type(screen.getByLabelText("Filter plugins"), "toy");
@@ -309,7 +309,7 @@ describe("catalog helpers", () => {
     expect(catalogState(entry, [plugin({ id: "hello", version: "0.0.9" })])).toBe("update");
     expect(catalogState(entry, [plugin({ id: "hello", version: "0.1.0" })])).toBe("installed");
     expect(catalogState(entry, [plugin({ id: "hello", source: "dev" })])).toBe("dev");
-    expect(filterCatalog(sampleCatalog(), "solarized").map((c) => c.id)).toEqual(["theme-solarized"]);
+    expect(filterCatalog(sampleCatalog(), "harbor").map((c) => c.id)).toEqual(["theme-harbor-night"]);
   });
 
   it("disables and re-enables all downloaded plugins, leaving dev plugins alone", async () => {

src/features/plugins/backend.ts

@@ -76,35 +76,21 @@ function ensureSubscribed() {
 // ---------------------------------------------------------------------------
 // Browser simulation: the bundled sample plugins, with `hello` implemented in JS.
 
-const SOLARIZED: ActiveTheme["theme"][] = [
+// templates/theme-plugin, abridged.
+const SAMPLE_THEMES: ActiveTheme["theme"][] = [
   {
-    id: "solarized-light",
-    name: "Solarized Light",
-    kind: "light",
-    tokens: {
-      "--bg-app": "#fdf6e3",
-      "--bg-island": "#fdf6e3",
-      "--bg-frame": "#eee8d5",
-      "--bg-elev": "#eee8d5",
-      "--fg": "#657b83",
-      "--accent": "#268bd2",
-      "--syn-keyword": "#859900",
-      "--syn-string": "#2aa198",
-    },
-  },
-  {
-    id: "solarized-dark",
-    name: "Solarized Dark",
+    id: "harbor-night",
+    name: "Harbor Night",
     kind: "dark",
     tokens: {
-      "--bg-app": "#002b36",
-      "--bg-island": "#002b36",
-      "--bg-frame": "#073642",
-      "--bg-elev": "#073642",
-      "--fg": "#839496",
-      "--accent": "#268bd2",
-      "--syn-keyword": "#859900",
-      "--syn-string": "#2aa198",
+      "--bg-app": "#14171c",
+      "--bg-island": "#14171c",
+      "--bg-frame": "#1f252e",
+      "--bg-elev": "#1b2027",
+      "--fg": "#c9d1dc",
+      "--accent": "#2b9e93",
+      "--syn-keyword": "#e0a46e",
+      "--syn-string": "#9ccc7a",
     },
   },
 ];
@@ -140,14 +126,14 @@ function samplePlugins(): PluginInfo[] {
     },
     {
       ...base,
-      id: "theme-solarized",
-      name: "Solarized Themes",
+      id: "theme-harbor-night",
+      name: "Harbor Night Theme",
       version: "1.0.0",
-      description: "Solarized Light and Solarized Dark: Ethan Schoonover's Solarized palette.",
-      path: "~/Library/Application Support/ai.l0ng.openidea/plugins/theme-solarized",
+      description: "Example dark theme: slate surfaces, a teal accent and a warm syntax palette.",
+      path: "~/Library/Application Support/ai.l0ng.openidea/plugins/theme-harbor-night",
       status: "static",
       hasCode: false,
-      themes: SOLARIZED.map(({ id, name, kind }) => ({ id, name, kind })),
+      themes: SAMPLE_THEMES.map(({ id, name, kind }) => ({ id, name, kind })),
     },
     {
       ...base,
@@ -201,7 +187,7 @@ export function createMemoryPluginsBackend(
   const activeTheme = (): ActiveTheme | null => {
     if (!theme) return null;
     const p = plugins.find((x) => x.id === theme?.pluginId);
-    const t = SOLARIZED.find((x) => x.id === theme?.themeId);
+    const t = SAMPLE_THEMES.find((x) => x.id === theme?.themeId);
     if (!p?.enabled || !t) return null;
     return { pluginId: p.id, theme: t };
   };