Improve assistant message action placement for split responses (#1032)

* Improve assistant message action placement for split responses

* Add toggle for split assistant message actions

* Address split message actions review feedback

* Fix inline assistant actions

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Co-authored-by: vhqtvn <8930337+vhqtvn@users.noreply.github.com>
Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/web/server/lib/opencode/settings-helpers.js

@@ -373,6 +373,9 @@ export const createSettingsHelpers = (dependencies) => {
     if (typeof candidate.stickyUserHeader === 'boolean') {
       result.stickyUserHeader = candidate.stickyUserHeader;
     }
+    if (typeof candidate.showSplitAssistantMessageActions === 'boolean') {
+      result.showSplitAssistantMessageActions = candidate.showSplitAssistantMessageActions;
+    }
     if (typeof candidate.fontSize === 'number' && Number.isFinite(candidate.fontSize)) {
       result.fontSize = Math.max(50, Math.min(200, Math.round(candidate.fontSize)));
     }