fix(manifold): let outputs list fill drawer

MAP.md

@@ -50,7 +50,7 @@ anchor + locked decisions) and the `docs/specs/*-spec.md` set.
   rect↔circular + feedback markers; ParticleStage has interactive cursor-labelled heatmap sliders, an adjustable
   joystick, and double-click whole-screen follow-mouse input), `Dock` (top Mode selector + 5 vertically-centred drawers), `Drawers`
   (Learning/Inputs/Outputs/Settings/Help; Learning includes the live model-architecture inspector and
-  expanded Outputs owns the remaining scroll height), `TrainingHealth` (real per-iteration loss curve from
+  Outputs owns the remaining scroll height), `TrainingHealth` (real per-iteration loss curve from
   `nisps_ml_loss_history` + per-layer weight health from `nisps_ml_get_layer_stats`; rendered only at
   the Learning drawer's `expanded` depth — that IS the advanced-surface flag), `VerdictCluster`
   (mode-aware), `OutputEditor`/`DualRange`/`CurvePad`, `icons.tsx`

manifold/ONBOARDING.md

@@ -158,8 +158,8 @@ for the narrow pane.
     core has no history; it never synthesises a curve.
   - **inputs** — enable/configure input sources (XY pad / MIDI / gamepad).
   - **route** (label "Outputs") — per-output control matrix + per-backend config; centered prepend/append `+`
-    controls are available in both condensed and expanded views, and at expanded depth the output rows fill the
-    remaining drawer height and scroll independently. The orange drawer tab uses `<` to expand and `>` to condense.
+    controls are available in both condensed and expanded views; the output rows fill the remaining drawer height
+    and scroll independently at both depths. The orange drawer tab uses `<` to expand and `>` to condense.
   - **settings** — icon style (monochrome/colour), input-map shape (xy/joystick/rect/circular), corner radius.
   - **help** — keymap pills + loop explanation.
 - `src/dock/` holds the output-routing internals used by the `route` drawer:

manifold/src/console/Drawers.tsx

@@ -791,9 +791,9 @@ function RoutingDrawer(ctx: ConsoleCtx, depth: DrawerDepth) {
           display: 'flex',
           flexDirection: 'column',
           gap: 4,
-          flex: expanded ? 1 : undefined,
-          minHeight: expanded ? 0 : undefined,
-          maxHeight: expanded ? undefined : 220,
+          flex: 1,
+          minHeight: 0,
+          boxSizing: 'border-box',
           padding: expanded ? '8px 10px' : '6px 10px',
           overflow: 'auto',
         }}