Add langdock api key env var on work mode

modules/home/opencode.nix

@@ -88,5 +88,14 @@ in
 
     # Link the generated config to the expected location
     xdg.configFile."opencode/opencode.json".source = config.lib.file.mkOutOfStoreSymlink config.sops.templates."opencode/opencode.json".path;
+
+    # Export the decrypted langdock API key as an env var (work config only).
+    # The secret lives in a runtime file, so we read it at shell startup rather
+    # than baking it into the Nix store via home.sessionVariables.
+    programs.zsh.initContent = lib.mkIf cfg.workMode ''
+      if [ -r "${config.sops.secrets.langdock_api_key.path}" ]; then
+        export LANGDOCK_API_KEY="$(cat "${config.sops.secrets.langdock_api_key.path}")"
+      fi
+    '';
   };
 }