Fix: dashboard "Last Execution" panel stuck on "Loading..." when no execution exists (#1714)

loadLastExecution()'s success handler only called displayLastExecution()
when the backend returned a non-null last_execution, so on a fresh server
(no tool run yet) the initial "Loading..." placeholder was never replaced.
displayLastExecution(null) already renders the correct empty state
("No executions yet.") — it just wasn't being called.

Add the missing else branch, mirroring how the Tool Usage and Executions
Queue panels already handle their empty states.

Fixes #1713

Co-authored-by: arimu1 <19286898+arimu1@users.noreply.github.com>

CHANGELOG.md

@@ -32,6 +32,12 @@ Status of the `main` branch. Changes prior to the next official version change w
     - used in `JetBrainsFindDeclarationTool`
     when using plugin version 2023.3.3+
 
+* Dashboard:
+  - Fix: the "Last Execution" panel stayed on "Loading..." forever when there was no logged execution
+    (e.g. a fresh server / no tool run yet), because `loadLastExecution()` only rendered the panel when
+    the backend returned a non-null execution; the empty state is now rendered via the existing
+    `displayLastExecution(null)` path, mirroring the other panels #1713
+
 * Dependencies:
   - Bump mcp from 1.27.0 to 1.28.1
 

src/serena/resources/dashboard/dashboard.js

@@ -913,6 +913,8 @@ class Dashboard {
                 if (response.status === 'success') {
                     if (response.last_execution !== null && response.last_execution.logged) {
                         self.displayLastExecution(response.last_execution);
+                    } else {
+                        self.displayLastExecution(null);
                     }
                 } else {
                     console.error('Error loading last execution:', response.message);