feat(dashboard): v0.3.0 — Status panel, dashboard_panel/grid, AppConfig pattern

- main.cpp: bump 0.2.0 → 0.3.0; añadir Status section en Settings via
  settings_window_add_section (fuente API/SQLite, URL, DB path, Reload).
- views.cpp: chart_panel manual + BeginChild custom → dashboard_panel/grid
  del registry. KPI cards con sparkline a la derecha, altura responsive.
- views.h: signature de draw_kpi_row pasa RegistryData (para sparkline).
- CMakeLists.txt: añadir process_state_machine.cpp (dependencia de
  process_runner tras issue 0045).

CMakeLists.txt

@@ -41,6 +41,7 @@ add_imgui_app(registry_dashboard
     ${CMAKE_SOURCE_DIR}/functions/core/select.cpp
     ${CMAKE_SOURCE_DIR}/functions/core/toast.cpp
     ${CMAKE_SOURCE_DIR}/functions/core/process_runner.cpp
+    ${CMAKE_SOURCE_DIR}/functions/core/process_state_machine.cpp
     ${CMAKE_SOURCE_DIR}/functions/core/tree_view.cpp
 )