refactor(ui): clean up Dashboard from 9 chaotic sections to 4 focused ones

Remove HealthRing, DepartmentOverview, TaskPipeline, SprintProgress,
GoalProgress, WorkforceGrid, ConnectorHealth. Move Needs Attention to
top. Reduce 9 metric cards to 4. Add Active Work section. -50KB bundle.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/renderer/App.tsx

@@ -808,12 +808,7 @@ export function App() {
                   projects={companyProjects}
                   activity={filteredActivity}
                   costs={companyCosts}
-                  connectors={snapshot.connectors}
-                  meetings={companyMeetings}
-                  sprints={companySprints}
                   messages={snapshot.agentMessages?.filter((message) => !currentCompany || message.companyId === currentCompany.id) ?? []}
-                  browserActions={browserActions}
-                  workflows={snapshot.workflows?.filter((workflow) => !currentCompany || workflow.companyId === currentCompany.id) ?? []}
                   onNavigate={navigateTo}
                 />
               ) : null}