fix(grabaciones): wire the recordings library into Settings navigation

WU15 shipped PantallaGrabaciones (the recordings library: storage bar,
recording rows, the "..." Rename/Share/Delete menu) fully tested but
reachable from nowhere in the app - a gap flagged in WU15's own
apply-progress notes, not fixed there since it needed a design
decision rather than a guess.

Coordinator ruling applied: the approved mockup's "Ajustes > Grabaciones"
screen depicts the library, not the folder/size settings form. So the
GRABACIONES Y MUSICA group's "Grabaciones" row in pantalla_ajustes.dart
now opens PantallaGrabaciones instead of PantallaAjustesGrabaciones.
The settings form is not dropped - it stays reachable, now from within
the library via a settings icon in its PluriPushScaffold actions,
matching the existing pantalla_ajustes_timer_sueno.dart "Add" action
precedent for a real capability living in the header.

One new ARB key (en/es only, per precedent): recordingsLibrarySettingsTooltip.

Tests: 604 -> 605 (one scenario re-targeted in pantalla_ajustes_test.dart,
one new scenario in pantalla_grabaciones_test.dart, which needed the
same ListTile-ink-assertion suppression helper WU3a/WU3b established
since it now pushes a ListTile-bearing settings screen). flutter
analyze unchanged at 1 pre-existing info.

Recorded in tasks.md as WU15b - not part of the original 18-unit plan,
added here to close the gap WU15 flagged.

openspec/changes/rediseno-funcional/tasks.md

@@ -13,6 +13,9 @@
 > needs. Tables and checklists are used throughout to keep it scannable despite the length.
 > **WU12 does not exist** — the native EQ band-count spike was resolved before planning closed (Engram id 2498, "keep
 > 5 bands"). Numbering skips 11→13 on purpose; this is not a gap.
+> **WU15b was added mid-apply, not planned upfront** — WU15 shipped `PantallaGrabaciones` (the recordings library)
+> fully tested but reachable from nowhere in the app. WU15b (below, after WU15's section) is the coordinator-ruled fix
+> that wires it into Settings navigation. It is small and does not change the 18-commit delivery model's shape.
 > Strict TDD is ON. Runner: `flutter test`. `flutter analyze` and a **scoped** `dart format` gate every commit.
 > **`flutter build` is never run.**
 >
@@ -51,6 +54,7 @@
 | 13 | `feat(eq): restyle equalizer screen and add custom presets` | 3a | 400-550 | Medium-High | Monitor |
 | 14 | `feat(reproductor): restructure full player with tool-tray and EQ sheet` | 13 | 450-600 | Medium-High | Monitor |
 | 15 | `feat(grabaciones): add recordings library screen` | 3b | ~~300-400~~ → **REALIZED: 1,767** (1,767+ / 0-, 22 files) | Medium | Monitor§ |
+| 15b | `fix(grabaciones): wire the recordings library into Settings navigation` | 15 | 60-100 | Low | No |
 | 16 | `feat(connectivity): restyle offline and reconnect banners` | 1 | 150-250 | Low | No |
 | 17 | `feat(bienvenida): add monetization-free welcome screen` | 1 | 150-200 | Low | No |
 | 18 | `feat(i18n): add redesign strings and translate Escuchar rename to 11 locales` | all | ~0 eng. / 400-600 data | Medium (data volume, low logic risk) | No |
@@ -640,7 +644,45 @@ and no task asks it to gain a "view library" link. WU15's own **Verify** command
 `pantalla_ajustes_grabaciones_test.dart` — confirming this screen is not meant to touch WU3b's file in this work
 unit. Not invented here; needs a design decision, not a guess.
 
-## WU16 — Connectivity states
+## WU15b — Wire the recordings library into Settings navigation
+
+**Not in the original plan — added to close the WU15 gap noted above.** WU15 built `PantallaGrabaciones` (the
+recordings library) fully tested and committed, but left it unreachable from the app: `rg "PantallaGrabaciones" lib/`
+found only its own declaration. This work unit exists solely to fix that.
+
+**Commit**: `fix(grabaciones): wire the recordings library into Settings navigation`
+**Depends on**: WU15
+**Spec refs**: `recordings-library` — Browsable Recordings List (reachability); `app-navigation-shell` — Push-Chrome
+on Second-Level Screens (the settings form stays a pushed screen, now one level deeper)
+**Verify**: `flutter test test/pantallas/pantalla_ajustes_test.dart test/pantallas/pantalla_grabaciones_test.dart test/pantallas/ajustes/pantalla_ajustes_grabaciones_test.dart && flutter analyze && dart format --set-exit-if-changed $(git diff --cached --name-only --diff-filter=ACM HEAD -- '*.dart')`
+**Modified tests**: `pantalla_ajustes_test.dart` (one scenario re-targeted), `pantalla_grabaciones_test.dart` (one new
+scenario)
+
+**Coordinator ruling applied.** The approved mockup's screen 12 ("Ajustes › Grabaciones") depicts the recordings
+**library**, not the settings form — so the `GRABACIONES Y MÚSICA` group's "Grabaciones" row now opens
+`PantallaGrabaciones` (the library) instead of `PantallaAjustesGrabaciones` (the folder/size-limit settings form).
+The settings form is not dropped: it stays reachable, but now from **within** the library, via a settings icon in its
+`PluriPushScaffold.actions` (matching the existing `pantalla_ajustes_timer_sueno.dart` "Add" action precedent for a
+real capability living in the header, not decorative chrome).
+
+- [x] 15b.1 RED — re-targeted `pantalla_ajustes_test.dart`'s "tapping the Grabaciones row" scenario: it now asserts
+      landing on `PantallaGrabaciones` (`find.text('My recordings')`), not the settings form (`find.text('Change
+      path')` asserted absent).
+- [x] 15b.2 RED — added a new scenario to `pantalla_grabaciones_test.dart`: tapping the library's settings icon
+      pushes a second `PluriPushScaffold` showing the settings form (`find.text('Change path')`).
+- [x] 15b.3 GREEN — `pantalla_ajustes.dart`: the "Grabaciones" `FilaAjuste.onTap` now pushes `PantallaGrabaciones`;
+      removed the now-unused `PantallaAjustesGrabaciones` import from this file.
+- [x] 15b.4 GREEN — `pantalla_grabaciones.dart`: added `actions: [IconButton(Icons.settings_outlined, ...)]` to its
+      `PluriPushScaffold`, pushing `PantallaAjustesGrabaciones`. One new ARB key (en/es only, matching precedent):
+      `recordingsLibrarySettingsTooltip`.
+- [x] 15b.5 REFACTOR — confirmed the new test needed the same `_suppressListTileInkAssertion()` helper WU3a/WU3b
+      established (WU3b Discovery 9: any pushed screen whose `PluriGlassSurface` body contains a tappable `ListTile`
+      needs it) — added to `pantalla_grabaciones_test.dart`, scoped to only the one new scenario that mounts
+      `PantallaAjustesGrabaciones`.
+- [x] 15b.6 Verify — scoped suite green: 605/605 (up from 604), 2 skipped (unchanged, both pre-existing WU15
+      documented skips). `flutter analyze`: 1 issue, identical to baseline. Literal-encoding scan: zero hits.
+
+
 
 **Commit**: `feat(connectivity): restyle offline and reconnect banners`
 **Depends on**: WU1