fix(dashboard): prevent cross-agent overwrite from stale Config tab autosave

Switching agents in the AgentsView split layout while on the Config tab
caused the autosave to write the previously-viewed agent's surface fields
(name, role, title, icon, model, skills) onto the newly-selected agent.
The Config tab's form state was initialized once at mount and never
resynced, while the master-detail layout reused the same component
instance across selections. Add key={selectedAgentId} on AgentDetailView
and key={agent.id} on ConfigTab so both remount with fresh state on every
agent transition.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/dashboard/app/components/AgentDetailView.tsx

@@ -704,7 +704,8 @@ export function AgentDetailView({ agentId, projectId, onClose, addToast, onChild
           )}
 
           {activeTab === "config" && (
-            <ConfigTab 
+            <ConfigTab
+              key={agent.id}
               agent={agent}
               projectId={projectId}
               addToast={addToast}

packages/dashboard/app/components/AgentsView.tsx

@@ -1459,6 +1459,7 @@ export function AgentsView({ addToast, projectId, onOpenTaskLogs, agentOnboardin
           {selectedAgentId ? (
             <Suspense fallback={null}>
               <AgentDetailView
+                key={selectedAgentId}
                 inline
                 showInlineBackButton={isMobileViewport}
                 agentId={selectedAgentId}