diff --git a/crates/tui/src/main.rs b/crates/tui/src/main.rs
index b6c859ea..6111fd25 100644
--- a/crates/tui/src/main.rs
+++ b/crates/tui/src/main.rs
@@ -625,6 +625,21 @@ fn resolve_serve_bind_host(mobile: bool, host: Option<String>) -> ServeBindHost
     }
 }
 
+fn validate_serve_mode_selection(mcp: bool, http: bool, mobile: bool, acp: bool) -> Result<bool> {
+    if http && mobile {
+        bail!("--http and --mobile are mutually exclusive; choose one");
+    }
+    let http_selected = http || mobile;
+    let selected_modes = [mcp, http_selected, acp]
+        .into_iter()
+        .filter(|selected| *selected)
+        .count();
+    if selected_modes != 1 {
+        bail!("Choose exactly one server mode: --mcp, --http/--mobile, or --acp");
+    }
+    Ok(http_selected)
+}
+
 #[derive(Subcommand, Debug, Clone)]
 enum McpCommand {
     /// List configured MCP servers
@@ -952,14 +967,8 @@ async fn main() -> Result<()> {
                 let workspace = cli.workspace.clone().unwrap_or_else(|| {
                     std::env::current_dir().unwrap_or_else(|_| PathBuf::from("."))
                 });
-                let http_selected = args.http || args.mobile;
-                let selected_modes = [args.mcp, http_selected, args.acp]
-                    .into_iter()
-                    .filter(|selected| *selected)
-                    .count();
-                if selected_modes != 1 {
-                    bail!("Choose exactly one server mode: --mcp, --http/--mobile, or --acp");
-                }
+                let http_selected =
+                    validate_serve_mode_selection(args.mcp, args.http, args.mobile, args.acp)?;
                 if args.mcp {
                     mcp_server::run_mcp_server(workspace)
                 } else if http_selected {
@@ -5641,6 +5650,15 @@ mod serve_bind_host_tests {
             }
         );
     }
+
+    #[test]
+    fn http_and_mobile_are_mutually_exclusive() {
+        let err = validate_serve_mode_selection(false, true, true, false).unwrap_err();
+        assert!(
+            err.to_string()
+                .contains("--http and --mobile are mutually exclusive")
+        );
+    }
 }
 
 #[cfg(test)]
diff --git a/crates/tui/src/runtime_mobile.html b/crates/tui/src/runtime_mobile.html
index f7ca0af0..cf8d6e44 100644
--- a/crates/tui/src/runtime_mobile.html
+++ b/crates/tui/src/runtime_mobile.html
@@ -275,7 +275,7 @@
     }
 
     function token() {
-      return $("token").value.trim();
+      return $("token").value;
     }
 
     function takeTokenFromUrl() {
@@ -368,7 +368,8 @@
         method: "POST",
         body: JSON.stringify({ decision, remember })
       });
-      container.innerHTML = "<span class='meta'>Decision sent: " + escapeHtml(result.decision) + "</span>";
+      const decided = result?.decision ?? decision;
+      container.innerHTML = "<span class='meta'>Decision sent: " + escapeHtml(decided) + "</span>";
     }
 
     function appendEvent(name, data) {