Add instance experimental setting for isolated workspaces

Introduce a singleton instance_settings store and experimental settings API, add the Experimental instance settings page, and gate execution workspace behavior behind the new enableIsolatedWorkspaces flag.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/services/instance-settings.ts

@@ -0,0 +1,95 @@
+import type { Db } from "@paperclipai/db";
+import { companies, instanceSettings } from "@paperclipai/db";
+import {
+  instanceExperimentalSettingsSchema,
+  type InstanceExperimentalSettings,
+  type InstanceSettings,
+  type PatchInstanceExperimentalSettings,
+} from "@paperclipai/shared";
+import { eq } from "drizzle-orm";
+
+const DEFAULT_SINGLETON_KEY = "default";
+
+function normalizeExperimentalSettings(raw: unknown): InstanceExperimentalSettings {
+  const parsed = instanceExperimentalSettingsSchema.safeParse(raw ?? {});
+  if (parsed.success) {
+    return {
+      enableIsolatedWorkspaces: parsed.data.enableIsolatedWorkspaces ?? false,
+    };
+  }
+  return {
+    enableIsolatedWorkspaces: false,
+  };
+}
+
+function toInstanceSettings(row: typeof instanceSettings.$inferSelect): InstanceSettings {
+  return {
+    id: row.id,
+    experimental: normalizeExperimentalSettings(row.experimental),
+    createdAt: row.createdAt,
+    updatedAt: row.updatedAt,
+  };
+}
+
+export function instanceSettingsService(db: Db) {
+  async function getOrCreateRow() {
+    const existing = await db
+      .select()
+      .from(instanceSettings)
+      .where(eq(instanceSettings.singletonKey, DEFAULT_SINGLETON_KEY))
+      .then((rows) => rows[0] ?? null);
+    if (existing) return existing;
+
+    const now = new Date();
+    const [created] = await db
+      .insert(instanceSettings)
+      .values({
+        singletonKey: DEFAULT_SINGLETON_KEY,
+        experimental: {},
+        createdAt: now,
+        updatedAt: now,
+      })
+      .onConflictDoUpdate({
+        target: [instanceSettings.singletonKey],
+        set: {
+          updatedAt: now,
+        },
+      })
+      .returning();
+
+    return created;
+  }
+
+  return {
+    get: async (): Promise<InstanceSettings> => toInstanceSettings(await getOrCreateRow()),
+
+    getExperimental: async (): Promise<InstanceExperimentalSettings> => {
+      const row = await getOrCreateRow();
+      return normalizeExperimentalSettings(row.experimental);
+    },
+
+    updateExperimental: async (patch: PatchInstanceExperimentalSettings): Promise<InstanceSettings> => {
+      const current = await getOrCreateRow();
+      const nextExperimental = normalizeExperimentalSettings({
+        ...normalizeExperimentalSettings(current.experimental),
+        ...patch,
+      });
+      const now = new Date();
+      const [updated] = await db
+        .update(instanceSettings)
+        .set({
+          experimental: { ...nextExperimental },
+          updatedAt: now,
+        })
+        .where(eq(instanceSettings.id, current.id))
+        .returning();
+      return toInstanceSettings(updated ?? current);
+    },
+
+    listCompanyIds: async (): Promise<string[]> =>
+      db
+        .select({ id: companies.id })
+        .from(companies)
+        .then((rows) => rows.map((row) => row.id)),
+  };
+}