Add plugin framework and settings UI

packages/db/src/schema/plugin_company_settings.ts

@@ -0,0 +1,41 @@
+import { pgTable, uuid, text, timestamp, jsonb, index, uniqueIndex, boolean } from "drizzle-orm/pg-core";
+import { companies } from "./companies.js";
+import { plugins } from "./plugins.js";
+
+/**
+ * `plugin_company_settings` table — stores operator-managed plugin settings
+ * scoped to a specific company.
+ *
+ * This is distinct from `plugin_config`, which stores instance-wide plugin
+ * configuration. Each company can have at most one settings row per plugin.
+ *
+ * Rows represent explicit overrides from the default company behavior:
+ * - no row => plugin is enabled for the company by default
+ * - row with `enabled = false` => plugin is disabled for that company
+ * - row with `enabled = true` => plugin remains enabled and stores company settings
+ */
+export const pluginCompanySettings = pgTable(
+  "plugin_company_settings",
+  {
+    id: uuid("id").primaryKey().defaultRandom(),
+    companyId: uuid("company_id")
+      .notNull()
+      .references(() => companies.id, { onDelete: "cascade" }),
+    pluginId: uuid("plugin_id")
+      .notNull()
+      .references(() => plugins.id, { onDelete: "cascade" }),
+    enabled: boolean("enabled").notNull().default(true),
+    settingsJson: jsonb("settings_json").$type<Record<string, unknown>>().notNull().default({}),
+    lastError: text("last_error"),
+    createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+    updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
+  },
+  (table) => ({
+    companyIdx: index("plugin_company_settings_company_idx").on(table.companyId),
+    pluginIdx: index("plugin_company_settings_plugin_idx").on(table.pluginId),
+    companyPluginUq: uniqueIndex("plugin_company_settings_company_plugin_uq").on(
+      table.companyId,
+      table.pluginId,
+    ),
+  }),
+);