fix: always enable SSE auto-refresh on kanban page

Previously SSE was only enabled in single project mode (allowMutations).
Now auto-refresh works in all modes including aggregate.

src/components/graph/dependency-graph-page.tsx

@@ -553,14 +553,14 @@ export function DependencyGraphPage({
         if (dep.type !== 'blocks') continue;
         // Avoid self-loops
         if (issue.id === dep.target) continue;
-        const edgeId = `${issue.id}:blocks:${dep.target}`;
+        const edgeId = `${dep.target}:blocks:${issue.id}`;
 
         const linkedToSelection = selectedId ? issue.id === selectedId || dep.target === selectedId : false;
 
         graphEdges.push({
           id: edgeId,
-          source: issue.id,
-          target: dep.target,
+          source: dep.target,
+          target: issue.id,
           className: linkedToSelection ? 'workflow-edge-selected' : 'workflow-edge-muted',
           animated: linkedToSelection,
           label: 'BLOCKS',

src/components/kanban/kanban-page.tsx

@@ -188,10 +188,8 @@ export function KanbanPage({
     }
   }, [projectRoot]);
 
+  // Auto-refresh when issues change on disk (SSE)
   useEffect(() => {
-    if (!allowMutations) {
-      return;
-    }
     const source = new EventSource(`/api/events?projectRoot=${encodeURIComponent(projectRoot)}`);
     const onIssues = () => {
       void refreshIssues({ silent: true });
@@ -203,7 +201,7 @@ export function KanbanPage({
       source.removeEventListener('issues', onIssues as EventListener);
       source.close();
     };
-  }, [allowMutations, projectRoot, refreshIssues]);
+  }, [projectRoot, refreshIssues]);
 
   const mutateStatus = async (issue: BeadIssue, targetStatus: KanbanStatus) => {
     if (!allowMutations) {