fix: wire conversation panel to DAG nodes with toggle support

- Add MessageSquare icon to GraphNodeCard; prop-thread onConversationOpen
  and selectedTaskId through WorkflowGraph node data (no useUrlState
  inside ReactFlow nodes — avoids context/timing issues)
- Fix ContextualRightPanel: check taskId before epicId so clicking the
  conversation icon always opens ThreadDrawer even when an epic filter
  is active
- setEpicId now clears task from URL so selecting an epic resets any
  open conversation thread
- handleGraphSelect toggles: second click on same node calls setTaskId(null)
  closing the right panel
- Add onSelect to WorkflowGraph flowModel deps to prevent stale callbacks
- Fix ContextualRightPanel onClose no-ops: wired to setTaskId(null) /
  setSwarmId(null) so back button works
- Right panel always visible (removed panel==='open' gate in UnifiedShell)
- SmartDag task grid: horizontal scroll, fixed-width cards, hideClosed=true
- Add <Suspense> in page.tsx for useSearchParams compatibility
- Enable dolt auto-start in .beads/config.yaml
- Add 14 static analysis tests (graph-node-conversation.test.tsx)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/activity/contextual-right-panel.tsx

@@ -7,6 +7,7 @@ import { SwarmCommandFeed } from './swarm-command-feed';
 import { ThreadDrawer } from '../shared/thread-drawer';
 import { MissionInspector } from '../mission/mission-inspector';
 import { useSwarmList } from '../../hooks/use-swarm-list';
+import { useUrlState } from '../../hooks/use-url-state';
 
 export interface ContextualRightPanelProps {
     epicId?: string | null;
@@ -17,23 +18,16 @@ export interface ContextualRightPanelProps {
 }
 
 export function ContextualRightPanel({ epicId, taskId, swarmId, issues, projectRoot }: ContextualRightPanelProps) {
-    if (epicId) {
-        return (
-            <SwarmCommandFeed
-                epicId={epicId}
-                issues={issues}
-                projectRoot={projectRoot}
-            />
-        );
-    }
+    const { setTaskId } = useUrlState();
 
+    // Task conversation takes priority — user explicitly clicked the conversation icon
     if (taskId) {
         const selectedIssue = issues.find(i => i.id === taskId) ?? null;
         return (
             <ThreadDrawer
                 isOpen={true}
                 embedded={true}
-                onClose={() => {}}
+                onClose={() => setTaskId(null)}
                 title={selectedIssue?.title ?? taskId}
                 id={taskId}
                 issue={selectedIssue}
@@ -43,6 +37,16 @@ export function ContextualRightPanel({ epicId, taskId, swarmId, issues, projectR
         );
     }
 
+    if (epicId) {
+        return (
+            <SwarmCommandFeed
+                epicId={epicId}
+                issues={issues}
+                projectRoot={projectRoot}
+            />
+        );
+    }
+
     if (swarmId) {
         return (
             <SwarmIdBranch
@@ -63,6 +67,7 @@ export function ContextualRightPanel({ epicId, taskId, swarmId, issues, projectR
 
 // Inner component so hooks can be called conditionally via component boundary
 function SwarmIdBranch({ swarmId, projectRoot }: { swarmId: string; projectRoot: string }) {
+    const { setSwarmId } = useUrlState();
     const { swarms } = useSwarmList(projectRoot);
     const swarm = swarms.find(s => s.swarmId === swarmId);
     // Fall back to swarmId as title while swarm list loads
@@ -76,7 +81,7 @@ function SwarmIdBranch({ swarmId, projectRoot }: { swarmId: string; projectRoot:
             missionTitle={missionTitle}
             projectRoot={projectRoot}
             assignedAgents={assignedAgents}
-            onClose={() => {}}
+            onClose={() => setSwarmId(null)}
             onAssign={async () => {}}
         />
     );