feat: block Bridge swap when send amount exceeds available balance

The Bridge screen let a user type any amount and enabled the Swap
button regardless of what they actually held, unlike the Swap screen
which shows a live "Max: X" and disables on overflow. The confirm-step
ValidationSystem would still catch it before signing, but only after
routing through Send - no immediate feedback on the Bridge screen
itself.

Wires WalletInteractor.assetFlow(chainId, assetId) to the currently
selected origin side (re-subscribed on every direction/pair change),
tracking Asset.transferable - the same field the real transfer
validation checks. Reuses the existing MaxAmountView/MaxAvailableView
widget the Swap screen already uses for the "Max: X" display, and adds
a matching error-bordered state to BridgeAssetInputView. The
"Insufficient balance" string (bridge_insufficient_balance) was
already translated into every locale but never wired to any code.

feature-assets/src/main/res/layout/fragment_bridge.xml

@@ -25,13 +25,27 @@
             android:orientation="vertical"
             android:padding="16dp">
 
-            <TextView
-                android:id="@+id/bridgeFromLabel"
-                style="@style/TextAppearance.NovaFoundation.Regular.Footnote"
-                android:layout_width="wrap_content"
+            <LinearLayout
+                android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:text="@string/bridge_you_send"
-                android:textColor="@color/text_secondary" />
+                android:gravity="center_vertical"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/bridgeFromLabel"
+                    style="@style/TextAppearance.NovaFoundation.Regular.Footnote"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="@string/bridge_you_send"
+                    android:textColor="@color/text_secondary" />
+
+                <io.novafoundation.nova.feature_wallet_api.presentation.view.amount.MaxAmountView
+                    android:id="@+id/bridgeFromMaxAmount"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content" />
+
+            </LinearLayout>
 
             <io.novafoundation.nova.feature_assets.presentation.bridge.view.BridgeAssetInputView
                 android:id="@+id/bridgeFromCard"

feature-assets/src/main/res/layout/view_bridge_asset_input.xml

@@ -110,4 +110,15 @@
 
     </androidx.constraintlayout.widget.ConstraintLayout>
 
+    <TextView
+        android:id="@+id/bridgeAssetInputError"
+        style="@style/TextAppearance.NovaFoundation.Regular.Caption1"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:textColor="@color/text_negative"
+        android:visibility="gone"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/bridgeAssetInputContainer" />
+
 </merge>