diff --git a/apps/web/app/install/install-wizard-client.tsx b/apps/web/app/install/install-wizard-client.tsx
index 3b875c3..9bc85c4 100644
--- a/apps/web/app/install/install-wizard-client.tsx
+++ b/apps/web/app/install/install-wizard-client.tsx
@@ -1214,7 +1214,7 @@ export default function InstallWizardClient() {
         />
       ) : null}
       <header className="sticky top-0 z-50 border-b border-white/[0.06] bg-[hsl(0,0%,3%)]/80 backdrop-blur-xl">
-        <div className="max-w-[1600px] mx-auto px-4 sm:px-6 h-14 flex items-center justify-between">
+        <div className="max-w-[1600px] mx-auto px-6 h-14 flex items-center justify-between">
           <div className="flex items-center gap-4">
             <Link href="/" className="flex items-center gap-2 text-white/60 hover:text-white/90 transition-colors">
               <ArrowLeft className="w-4 h-4" />
@@ -1223,18 +1223,7 @@ export default function InstallWizardClient() {
             <div className="w-px h-5 bg-white/10" />
             <h1 className="text-sm font-medium text-white/80">Configure Installation</h1>
           </div>
-          <div className="flex items-center gap-2 sm:gap-3">
-            <Button
-              variant="ghost"
-              size="sm"
-              onClick={reset}
-              className="lg:hidden text-white/60 hover:text-white hover:bg-white/5"
-              aria-label="Reset to defaults"
-              title="Reset to defaults"
-            >
-              <RefreshCw className="w-4 h-4" />
-              <span className="hidden sm:inline">Reset</span>
-            </Button>
+          <div className="flex items-center gap-3">
             <Button
               variant="ghost"
               size="sm"
@@ -1242,23 +1231,22 @@ export default function InstallWizardClient() {
               className="text-white/60 hover:text-white hover:bg-white/5"
             >
               <Share2 className="w-4 h-4" />
-              <span className="hidden sm:inline">{copied === 'url' ? 'Copied!' : 'Share'}</span>
+              {copied === 'url' ? 'Copied!' : 'Share'}
             </Button>
             <a
               href="/docs/getting-started/quickstart"
               target="_blank"
               className="flex items-center gap-2 text-sm text-white/60 hover:text-white/90 transition-colors"
-              aria-label="Docs"
             >
-              <span className="hidden sm:inline">Docs</span>
+              <span>Docs</span>
               <ExternalLink className="w-3.5 h-3.5" />
             </a>
           </div>
         </div>
       </header>
 
-      <div className="max-w-[1600px] mx-auto flex flex-col lg:flex-row min-h-[calc(100vh-3.5rem)]">
-        <aside className="hidden lg:block w-64 shrink-0 border-r border-white/[0.06] p-6">
+      <div className="max-w-[1600px] mx-auto flex min-h-[calc(100vh-3.5rem)]">
+        <aside className="w-64 shrink-0 border-r border-white/[0.06] p-6">
           <div className="sticky top-20">
             <div className="text-xs font-medium uppercase tracking-wider text-white/30 mb-4">Steps</div>
             <nav className="space-y-1">
@@ -1313,82 +1301,8 @@ export default function InstallWizardClient() {
           </div>
         </aside>
 
-        <main className="flex-1 p-4 sm:p-6 lg:p-8 overflow-visible lg:overflow-y-auto">
+        <main className="flex-1 p-8 overflow-y-auto">
           <div className="max-w-2xl">
-            {/* Mobile: step navigation */}
-            <div className="lg:hidden mb-6">
-              <div className="flex items-center justify-between gap-3">
-                <div className="text-xs font-medium uppercase tracking-wider text-white/30">Steps</div>
-                <div className="text-xs text-white/35">
-                  {currentStep + 1} / {STEPS.length}
-                </div>
-              </div>
-              <div className="mt-3 flex gap-2 overflow-x-auto pb-2 -mx-1 px-1">
-                {STEPS.map((step, index) => {
-                  const isActive = index === currentStep;
-                  const isCompleted = index < currentStep;
-                  return (
-                    <button
-                      key={step.id}
-                      type="button"
-                      onClick={() => goToStep(index)}
-                      className={cn(
-                        'inline-flex items-center gap-2 rounded-lg border px-3 py-2 text-sm transition-colors',
-                        'focus:outline-none focus-visible:ring-2 focus-visible:ring-white/20',
-                        isActive
-                          ? 'border-white/25 bg-white/[0.05] text-white'
-                          : isCompleted
-                            ? 'border-white/[0.10] bg-white/[0.02] text-white/70'
-                            : 'border-white/[0.08] bg-white/[0.01] text-white/50 hover:bg-white/[0.03] hover:text-white/70'
-                      )}
-                    >
-                      <div
-                        className={cn(
-                          'w-6 h-6 rounded-md flex items-center justify-center transition-colors shrink-0',
-                          isActive
-                            ? 'bg-white/10 text-white'
-                            : isCompleted
-                              ? 'bg-emerald-500/10 text-emerald-400'
-                              : 'bg-white/5 text-white/30'
-                        )}
-                      >
-                        {isCompleted ? <Check className="w-3.5 h-3.5" /> : step.icon}
-                      </div>
-                      <span className="whitespace-nowrap font-medium">{step.label}</span>
-                    </button>
-                  );
-                })}
-              </div>
-            </div>
-
-            {/* Mobile/tablet: show live preview (desktop has right sidebar) */}
-            <div className="xl:hidden mb-8">
-              <div className="rounded-xl border border-white/[0.08] bg-black/40 p-4">
-                <div className="text-xs font-medium uppercase tracking-wider text-white/30 mb-3">Live Preview</div>
-                <div className="space-y-2">
-                  <div className="flex items-center justify-between gap-3 text-sm">
-                    <span className="text-white/50">Directory</span>
-                    <span className="font-mono text-white/80 truncate max-w-[60%]">{state.install.installDir}</span>
-                  </div>
-                  <div className="flex items-center justify-between gap-3 text-sm">
-                    <span className="text-white/50">Adapter</span>
-                    <span className="text-white/80">{state.install.storeAdapter}</span>
-                  </div>
-                  <div className="flex items-center justify-between gap-3 text-sm">
-                    <span className="text-white/50">Embedding</span>
-                    <span className="text-white/80 capitalize">{state.embedding.type}</span>
-                  </div>
-                  <div className="flex items-center justify-between gap-3 text-sm">
-                    <span className="text-white/50">Extractors</span>
-                    <span className="text-white/80">{state.modules.extractors.length}</span>
-                  </div>
-                  <div className="flex items-center justify-between gap-3 text-sm">
-                    <span className="text-white/50">Connectors</span>
-                    <span className="text-white/80">{state.modules.connectors.length}</span>
-                  </div>
-                </div>
-              </div>
-            </div>
             {currentStepId === 'install' && (
               <div
                 className={cn(
@@ -1769,7 +1683,7 @@ export default function InstallWizardClient() {
                     </div>
                   </FieldGroup>
 
-                  <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
+                  <div className="grid grid-cols-3 gap-4">
                     <FieldGroup label="Chunk size">
                       <Select
                         value={String(state.defaults.chunkSize)}
@@ -2030,7 +1944,7 @@ export default function InstallWizardClient() {
                 <SectionHeader title="Review & Install" description="Review your configuration and generate the install command." />
 
                 <div className="space-y-6">
-                  <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
+                  <div className="grid grid-cols-2 gap-4">
                     <div className="rounded-xl border border-white/[0.08] bg-white/[0.02] p-4">
                       <div className="text-xs font-medium uppercase tracking-wider text-white/30 mb-2">Database</div>
                       <div className="text-lg font-medium text-white/90">{summary.adapter}</div>
@@ -2095,7 +2009,7 @@ export default function InstallWizardClient() {
                     </div>
                   </div>
 
-                  <div className="flex flex-col sm:flex-row sm:items-center gap-3">
+                  <div className="flex items-center gap-3">
                     {!presetId && (
                       <Button onClick={handleCreatePreset} disabled={creatingPreset} variant="cta">
                         {creatingPreset ? (
@@ -2154,20 +2068,17 @@ export default function InstallWizardClient() {
               </div>
             )}
 
-            <div className="flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between mt-12 pt-6 border-t border-white/[0.06]">
+            <div className="flex items-center justify-between mt-12 pt-6 border-t border-white/[0.06]">
               <Button
                 variant="ghost"
                 onClick={() => goToStep(currentStep - 1)}
                 disabled={currentStep === 0}
-                className={cn(
-                  'w-full sm:w-auto text-white/60 hover:text-white hover:bg-white/5 disabled:opacity-30',
-                  currentStep === 0 && 'hidden sm:invisible'
-                )}
+                className={cn('text-white/60 hover:text-white hover:bg-white/5 disabled:opacity-30', currentStep === 0 && 'invisible')}
               >
                 <ArrowLeft className="w-4 h-4 mr-2" />
                 Previous
               </Button>
-              <div className="flex items-center justify-center gap-1.5">
+              <div className="flex items-center gap-1.5">
                 {STEPS.map((_, index) => (
                   <button
                     key={index}
@@ -2185,7 +2096,7 @@ export default function InstallWizardClient() {
               </div>
               <Button
                 onClick={() => goToStep(currentStep + 1)}
-                className={cn('w-full sm:w-auto', currentStep === STEPS.length - 1 && 'hidden sm:invisible')}
+                className={cn(currentStep === STEPS.length - 1 && 'invisible')}
                 variant="cta"
                 size="sm"
               >
diff --git a/packages/unrag/cli/lib/registry.ts b/packages/unrag/cli/lib/registry.ts
index ecc7e3e..6dce6d3 100644
--- a/packages/unrag/cli/lib/registry.ts
+++ b/packages/unrag/cli/lib/registry.ts
@@ -536,6 +536,10 @@ export async function copyRegistryFiles(selection: RegistrySelection) {
       src: path.join(selection.registryRoot, "core/config.ts"),
       dest: path.join(installBaseAbs, "core/config.ts"),
     },
+    {
+      src: path.join(selection.registryRoot, "core/deep-merge.ts"),
+      dest: path.join(installBaseAbs, "core/deep-merge.ts"),
+    },
     {
       src: path.join(selection.registryRoot, "core/context-engine.ts"),
       dest: path.join(installBaseAbs, "core/context-engine.ts"),
diff --git a/packages/unrag/test/init.test.ts b/packages/unrag/test/init.test.ts
index 2f8c686..9ebdc99 100644
--- a/packages/unrag/test/init.test.ts
+++ b/packages/unrag/test/init.test.ts
@@ -55,6 +55,7 @@ describe("unrag@latest init", () => {
     expect(await pathExists(path.join(runDir, "unrag.config.ts"))).toBe(true);
     expect(await pathExists(path.join(runDir, "lib/unrag", "unrag.md"))).toBe(true);
     expect(await pathExists(path.join(runDir, "lib/unrag/core/delete.ts"))).toBe(true);
+    expect(await pathExists(path.join(runDir, "lib/unrag/core/deep-merge.ts"))).toBe(true);
 
     expect(
       await pathExists(