docs: add Matrix community chat links

docs/README.md

@@ -44,6 +44,14 @@ Keywarden provides a clean web UI to generate, import, and securely store SSH ke
 
 ---
 
+## Community
+
+Have questions, ideas, or feedback? Join the Keywarden Matrix chat room:
+
+➡️ [#keywarden:techniverse.net](https://matrix.to/#/#keywarden:techniverse.net)
+
+---
+
 ## License
 
 Keywarden is licensed under the [GNU Affero General Public License v3.0 (AGPL-3.0-or-later)](../LICENSE).

docs/contributing.md

@@ -144,6 +144,14 @@ Test files are co-located with their packages (e.g., `auth_test.go`, `config_tes
 - Error messages should be lowercase
 - Log messages use the structured logging package (`logging.Info`, `logging.Debug`, etc.)
 
+## Community & Communication
+
+For questions, discussions, and coordination with other contributors, join the Matrix chat:
+
+➡️ [#keywarden:techniverse.net](https://matrix.to/#/#keywarden:techniverse.net)
+
+---
+
 ## License
 
 All contributions must be compatible with the [AGPL-3.0-or-later](../LICENSE) license.

docs/troubleshooting.md

@@ -213,3 +213,11 @@ Every HTTP request is logged with:
 - Response time
 - Client IP address
 - Username (if authenticated)
+
+---
+
+## Still Need Help?
+
+If your issue isn't covered here, join the community Matrix chat to ask for help:
+
+➡️ [#keywarden:techniverse.net](https://matrix.to/#/#keywarden:techniverse.net)