feat(FN-3027): add AgentLogViewer, NewAgentDialog improvements, and AgentDe

This merge adds research settings to the settings modal and dashboard (FN-2839, FN-3029), implements a dashboard font scale setting with persistence and documentation (FN-3027), refactors AgentDetailView with a new AgentLogViewer CSS module (FN-2839), and improves NewAgentDialog with custom model dr

Fusion-Task-Id: FN-3027

packages/core/src/settings-schema.ts

@@ -14,6 +14,7 @@ type CompleteSettings<T> = { [K in keyof Required<T>]: Required<T>[K] | undefine
 export const DEFAULT_GLOBAL_SETTINGS = {
   themeMode: "dark",
   colorTheme: "default",
+  dashboardFontScalePct: 100,
   defaultProvider: undefined,
   defaultModelId: undefined,
   fallbackProvider: undefined,