strengthen repo verification and runtime coverage

Add clearer app docs plus targeted desktop, CLI, web, and worker tests so cross-surface regressions are caught earlier and the repo is easier to navigate.

apps/cli/test/run-tests.mjs

@@ -0,0 +1,31 @@
+import { mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import { spawn } from "node:child_process";
+import { fileURLToPath } from "node:url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const packageDir = path.resolve(__dirname, "..");
+const tempRoot = await mkdtemp(path.join(tmpdir(), "rowboat-cli-test-"));
+const testWorkDir = path.join(tempRoot, "workspace");
+
+try {
+  const exitCode = await new Promise((resolve, reject) => {
+    const child = spawn(process.execPath, ["--test", "./test/repos.test.mjs", "./test/server.test.mjs"], {
+      cwd: packageDir,
+      stdio: "inherit",
+      env: {
+        ...process.env,
+        ROWBOAT_WORKDIR: testWorkDir,
+      },
+    });
+
+    child.on("error", reject);
+    child.on("exit", (code) => resolve(code ?? 1));
+  });
+
+  process.exitCode = Number(exitCode);
+} finally {
+  await rm(tempRoot, { recursive: true, force: true });
+}