pluriwave/openspec/changes/startup-retry-custom-stations-eq-persistence/tasks.md

Tasks: Startup retry, custom stations, and equalizer persistence

Phase 1: Test seams and RED tests

• 1.1 RED: Add test/servicios/servicio_radio_test.dart proving a transient HTTP failure retries with another host and succeeds.
• 1.2 RED: Add test/servicios/servicio_radio_test.dart proving exhausted retries surface an error after the configured attempt cap.
• 1.3 RED: Add test/estado/estado_radio_test.dart proving a saved custom station is included in the main listing getter.
• 1.4 RED: Add test/estado/estado_radio_test.dart proving main EQ loads from persistence before playback EQ selection.
• 1.5 RED: Add station EQ tests proving own EQ overrides main and disabled own EQ falls back to main.
• 1.6 RED: Add/update a widget test proving PantallaInicio renders custom stations and favorite tap calls the favorite flow.

Phase 2: Foundation / services

• 2.1 GREEN: Modify ServicioRadio to accept injectable http.Client, host list, max attempts, and retry delay while preserving default constructor behavior.
• 2.2 GREEN: Implement bounded retry/host rotation in ServicioRadio._get() without adding unbounded startup waits.
• 2.3 GREEN: Create lib/servicios/servicio_ecualizador.dart with SharedPreferences JSON load/save for main EQ and per-station EQ map.
• 2.4 GREEN: Add equality/copy helpers to PresetEcualizador only if required by tests.

Phase 3: State integration

• 3.1 GREEN: Update EstadoRadio constructor for optional service injection and load EQ config during _init().
• 3.2 GREEN: Add a combined main listing getter (emisorasInicio or equivalent) that includes custom stations plus API stations without duplicates.
• 3.3 GREEN: Persist main EQ changes when no station-own EQ scope is active.
• 3.4 GREEN: Add methods to enable/update/disable EQ per favorite station and persist the map.
• 3.5 GREEN: Change playback EQ selection to apply station EQ when present, otherwise main EQ.

Phase 4: UI wiring

• 4.1 GREEN: Update PantallaInicio to render the combined main listing when no genre filter is selected.
• 4.2 GREEN: Reuse TarjetaEmisora favorite controls for custom stations; do not introduce a parallel favorite path.
• 4.3 GREEN: Update PantallaAjustes EQ controls to show/edit main EQ and, when the current station is a favorite, allow own-EQ vs main-EQ mode.
• 4.4 GREEN: Fix ServicioAudio/handler so emisoraActual is set on successful playback and cleared on stop/error as tests require.

Phase 5: REFACTOR and verification

• 5.1 REFACTOR: Remove duplicated JSON/persistence logic from EstadoRadio where the new service owns it.
• 5.2 REFACTOR: Keep Spanish naming and Provider/ChangeNotifier style consistent with existing folders.
• 5.3 VERIFY: Run flutter test only; never run flutter build.
• 5.4 VERIFY: Compare passing tests against every Given/When/Then scenario in spec.md.