Implement experimental file-based encrypted private chat

Add fixed-suite Rust/WASI identity files, signed challenge authentication, ciphertext-only SQLite storage, a minimal LibreJS-compatible interface, and consistent backup snapshots. Keep production unchanged and document the local workflow, limits, source distribution, and browser recovery tests.

1 files changed, 31 insertions, 0 deletions

diff --git a/crates/chat-server/web/worker.js b/crates/chat-server/web/worker.js
new file mode 100644
index 0000000..64e0795
--- /dev/null
+++ b/crates/chat-server/web/worker.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-3.0
+
+importScripts('/wasi.mjs');
+
+self.onmessage = async event => {
+    try {
+        const result = await self.stackChatWasi.runCommand(event.data.bytes, event.data.request);
+        self.postMessage({ result });
+    } catch {
+        self.postMessage({ error: 'Cryptographic operation failed. Check your file, password, origin, and sender.' });
+    } finally {
+        self.close();
+    }
+};
+
+// @license-end