feat(ui): add workspace customization and simplify navigation

server/settings/preferences.ts

@@ -0,0 +1,60 @@
+import "server-only";
+
+import { eq } from "drizzle-orm";
+import { z } from "zod";
+import type { ColorMode } from "@/lib/color-mode";
+import { getSqliteConnection } from "@/server/db/client";
+import { userPreferences } from "@/server/db/schema";
+import { assertEnabledActor, type DomainActor } from "@/server/domain/actor";
+import { DomainError } from "@/server/domain/errors";
+
+const colorModeInputSchema = z.object({
+  colorMode: z.enum(["light", "dark", "system"]),
+});
+
+export type PublicUserPreferences = {
+  colorMode: ColorMode;
+};
+
+export function getUserPreferences(actor: DomainActor): PublicUserPreferences {
+  assertEnabledActor(actor);
+
+  const row = getSqliteConnection().db
+    .select({ colorMode: userPreferences.colorMode })
+    .from(userPreferences)
+    .where(eq(userPreferences.ownerUserId, actor.authUserId))
+    .get();
+
+  return {
+    colorMode: (row?.colorMode as ColorMode | undefined) ?? "system",
+  };
+}
+
+export function updateColorModePreference(
+  actor: DomainActor,
+  input: unknown,
+): PublicUserPreferences {
+  assertEnabledActor(actor);
+
+  const parsed = colorModeInputSchema.safeParse(input);
+  if (!parsed.success) {
+    throw new DomainError("VALIDATION_ERROR", "Renk modu tercihi geçersiz.");
+  }
+
+  const { db } = getSqliteConnection();
+  db.insert(userPreferences)
+    .values({
+      ownerUserId: actor.authUserId,
+      colorMode: parsed.data.colorMode,
+    })
+    .onConflictDoUpdate({
+      target: userPreferences.ownerUserId,
+      set: {
+        colorMode: parsed.data.colorMode,
+        updatedAt: new Date().toISOString(),
+      },
+    })
+    .run();
+
+  return { colorMode: parsed.data.colorMode };
+}