chore: import upstream snapshot with attribution

tests/unit/compression/compression-engines-map-migration.test.ts

@@ -0,0 +1,69 @@
+import { test, after } from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+
+const TEST_DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), "omniroute-compression-engines-"));
+const ORIGINAL_DATA_DIR = process.env.DATA_DIR;
+process.env.DATA_DIR = TEST_DATA_DIR;
+
+const { getDbInstance, resetDbInstance } = await import("../../../src/lib/db/core.ts");
+const { getCompressionSettings, updateCompressionSettings } = await import(
+  "../../../src/lib/db/compression.ts"
+);
+
+function freshDir() {
+  resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+  fs.mkdirSync(TEST_DATA_DIR, { recursive: true });
+}
+
+after(() => {
+  resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+  if (ORIGINAL_DATA_DIR === undefined) {
+    delete process.env.DATA_DIR;
+  } else {
+    process.env.DATA_DIR = ORIGINAL_DATA_DIR;
+  }
+});
+
+test("migration backfills engines map from prior defaultMode + default combo", async () => {
+  freshDir();
+  const db = getDbInstance(); // runs migrations incl. 102
+  // simulate a pre-102 install: master on, defaultMode 'standard', caveman enabled
+  db.prepare(
+    "INSERT OR REPLACE INTO key_value(namespace,key,value) VALUES('compression','enabled','true')"
+  ).run();
+  db.prepare(
+    "INSERT OR REPLACE INTO key_value(namespace,key,value) VALUES('compression','defaultMode','\"standard\"')"
+  ).run();
+  db.prepare(
+    "INSERT OR REPLACE INTO key_value(namespace,key,value) VALUES('compression','cavemanConfig','{\"enabled\":true}')"
+  ).run();
+  const cfg = await getCompressionSettings();
+  assert.equal(cfg.engines.caveman.enabled, true);
+  assert.equal(cfg.activeComboId, null);
+  // No stored engines row → backfilled map is display-only; dispatch stays on the legacy path.
+  assert.equal(cfg.enginesExplicit, false);
+});
+
+test("engines map persists round-trip + activeComboId", async () => {
+  freshDir();
+  getDbInstance();
+  await updateCompressionSettings({
+    enabled: true,
+    engines: {
+      rtk: { enabled: true, level: "standard" },
+      caveman: { enabled: true, level: "full" },
+    },
+    activeComboId: null,
+  });
+  const cfg = await getCompressionSettings();
+  assert.equal(cfg.engines.rtk.enabled, true);
+  assert.equal(cfg.engines.rtk.level, "standard");
+  assert.equal(cfg.engines.caveman.level, "full");
+  // A stored engines row exists → the panel configured engines; dispatch trusts the map.
+  assert.equal(cfg.enginesExplicit, true);
+});