diff --git a/web/src/app/(app)/reviews/page.tsx b/web/src/app/(app)/reviews/page.tsx
index 1c0b74b..8fbf293 100644
--- a/web/src/app/(app)/reviews/page.tsx
+++ b/web/src/app/(app)/reviews/page.tsx
@@ -5,6 +5,17 @@ import { useCallback, useEffect, useMemo, useState } from "react";
 import { AppShell } from "@/components/AppShell";
 import { AgentTimeline } from "@/components/AgentTimeline";
 import { ProposalReviewCard } from "@/components/ProposalReviewCard";
+import {
+  Badge,
+  Button,
+  ListItemButton,
+  Panel,
+  PanelBody,
+  PanelHeader,
+  PanelTitle,
+  StatusBadge,
+  Textarea,
+} from "@/components/ui/Primitives";
 import { approveReviewItem, batchReviewItems, listAgentTimeline, listApprovalQueue, rejectReviewItem } from "@/lib/review-client";
 import { toast } from "@/lib/toast";
 import type { AgentTimelineItem, ApprovalQueueItem } from "@/lib/types";
@@ -175,105 +186,88 @@ export default function ReviewsPage() {
     <AppShell
       title="Agent review"
       description="Approval queue, proposal comparison, and audit-oriented review surfaces for agent-mediated edits."
-      actions={<div className="badge">Operator workflow shell</div>}
+      actions={<Badge>Operator workflow shell</Badge>}
     >
       <section style={{ display: "grid", gridTemplateColumns: "minmax(260px, 320px) minmax(0, 1fr)", gap: "var(--nl-space-4)" }}>
-        <aside className="surface-card" style={{ padding: "var(--nl-space-5)", display: "grid", gap: "var(--nl-space-4)" }}>
-          <div style={{ fontWeight: 700 }}>Operator workflows</div>
+        <Panel as="aside">
+          <PanelHeader>
+            <PanelTitle>Operator workflows</PanelTitle>
+          </PanelHeader>
           <div style={{ display: "grid", gap: "var(--nl-space-3)" }}>
             {operatorWorkflows.map((workflow) => (
               <Link
                 key={workflow.id}
                 href={getWorkflowHref(workflow)}
-                className="surface-muted"
-                style={{ padding: "var(--nl-space-4)", display: "grid", gap: "var(--nl-space-2)" }}
+                style={{ display: "grid", gap: "var(--nl-space-2)" }}
               >
                 <strong>{workflow.name}</strong>
                 <span style={{ color: "var(--nl-text-secondary)" }}>Owner: {workflow.owner}</span>
                 <div style={{ display: "flex", gap: "var(--nl-space-2)", flexWrap: "wrap" }}>
-                  <span className="badge">{workflow.status}</span>
-                  <span className="badge">Queue: {workflow.queueCount}</span>
-                  <span className="badge">SLA {workflow.sla}</span>
+                  <StatusBadge status={workflow.status === "healthy" ? "approved" : "pending"}>
+                    {workflow.status}
+                  </StatusBadge>
+                  <Badge>Queue: {workflow.queueCount}</Badge>
+                  <Badge>SLA {workflow.sla}</Badge>
                 </div>
               </Link>
             ))}
           </div>
-        </aside>
+        </Panel>
 
-        <section className="surface-card" style={{ padding: "var(--nl-space-5)", display: "grid", gap: "var(--nl-space-4)" }}>
-          <div style={{ display: "flex", justifyContent: "space-between", gap: "var(--nl-space-3)", flexWrap: "wrap" }}>
-            <div style={{ fontWeight: 700 }}>Approval queue</div>
+        <Panel>
+          <PanelHeader>
+            <PanelTitle>Approval queue</PanelTitle>
             <div style={{ display: "flex", gap: "var(--nl-space-2)", flexWrap: "wrap", alignItems: "center" }}>
               {batchMode ? (
                 <>
-                  <span className="badge">{selectedBatchIds.size} selected</span>
-                  <button type="button" className="badge" onClick={clearBatch} style={{ cursor: "pointer" }}>Clear</button>
+                  <Badge>{selectedBatchIds.size} selected</Badge>
+                  <Button type="button" variant="ghost" size="sm" onClick={clearBatch}>Clear</Button>
                 </>
               ) : (
-                <button type="button" className="badge" onClick={selectAllForBatch} style={{ cursor: "pointer" }}>Select all</button>
+                <Button type="button" variant="ghost" size="sm" onClick={selectAllForBatch}>Select all</Button>
               )}
-              <span className="badge">status:pending</span>
+              <StatusBadge status="pending">status:pending</StatusBadge>
             </div>
-          </div>
+          </PanelHeader>
           {error ? <div style={{ color: "var(--nl-text-secondary)" }}>{error}</div> : null}
 
           {batchMode ? (
             <div style={{ display: "flex", gap: "var(--nl-space-2)", flexWrap: "wrap" }}>
-              <button
+              <Button
                 type="button"
                 disabled={isSubmitting}
                 onClick={() => void handleBatchDecision("approved")}
-                style={{
-                  border: "none",
-                  borderRadius: "var(--nl-radius-md)",
-                  padding: "8px 16px",
-                  background: "var(--nl-accent-primary)",
-                  color: "var(--nl-text-primary)",
-                  fontWeight: 600,
-                  cursor: "pointer",
-                }}
               >
                 Approve {selectedBatchIds.size}
-              </button>
-              <button
+              </Button>
+              <Button
                 type="button"
                 disabled={isSubmitting}
                 onClick={() => void handleBatchDecision("rejected")}
-                className="surface-muted"
-                style={{
-                  border: "1px solid var(--nl-border-subtle)",
-                  borderRadius: "var(--nl-radius-md)",
-                  padding: "8px 16px",
-                  cursor: "pointer",
-                }}
+                variant="destructive"
               >
                 Reject {selectedBatchIds.size}
-              </button>
+              </Button>
             </div>
           ) : null}
 
           <div style={{ display: "grid", gap: "var(--nl-space-3)" }}>
             {approvalQueue.map((item) => (
-              <button
+              <ListItemButton
                 key={item.id}
-                type="button"
-                className="surface-muted"
+                selected={
+                  batchMode
+                    ? selectedBatchIds.has(item.id)
+                    : featuredProposal?.id === item.id
+                }
                 onClick={() => batchMode ? toggleBatchItem(item.id) : setSelectedApprovalId(item.id)}
                 style={{
-                  padding: "var(--nl-space-4)",
                   display: "flex",
                   justifyContent: "space-between",
                   gap: "var(--nl-space-3)",
                   alignItems: "center",
                   flexWrap: "wrap",
                   textAlign: "left",
-                  width: "100%",
-                  borderColor: batchMode
-                    ? selectedBatchIds.has(item.id) ? "var(--nl-accent-primary)" : undefined
-                    : featuredProposal?.id === item.id ? "var(--nl-accent-primary)" : undefined,
-                  background: batchMode
-                    ? selectedBatchIds.has(item.id) ? "var(--nl-accent-muted)" : undefined
-                    : featuredProposal?.id === item.id ? "var(--nl-accent-muted)" : undefined,
                 }}
               >
                 <div style={{ display: "grid", gap: 4 }}>
@@ -282,38 +276,31 @@ export default function ReviewsPage() {
                 </div>
                 <div style={{ display: "flex", gap: "var(--nl-space-2)", flexWrap: "wrap" }}>
                   {batchMode ? (
-                    <span className="badge">{selectedBatchIds.has(item.id) ? "selected" : "unselected"}</span>
+                    <Badge>{selectedBatchIds.has(item.id) ? "selected" : "unselected"}</Badge>
                   ) : null}
-                  <span className="badge">{item.severity}</span>
-                  <span className="badge">{item.status}</span>
+                  <Badge>{item.severity}</Badge>
+                  <StatusBadge status={item.status === "proposed" ? "proposed" : "pending"}>
+                    {item.status}
+                  </StatusBadge>
                 </div>
-              </button>
+              </ListItemButton>
             ))}
           </div>
-        </section>
+        </Panel>
       </section>
 
-      <section className="surface-card" style={{ padding: "var(--nl-space-5)", display: "grid", gap: "var(--nl-space-3)" }}>
-        <label htmlFor="review-note" style={{ fontWeight: 600 }}>Review note</label>
-        <textarea
+      <Panel>
+        <PanelBody>
+        <Textarea
           id="review-note"
+          label="Review note"
           value={reviewNote}
           onChange={(e) => setReviewNote(e.target.value)}
           placeholder="Optional: add a note explaining your decision…"
           rows={2}
-          style={{
-            width: "100%",
-            padding: "var(--nl-space-3)",
-            background: "var(--nl-bg-elevated)",
-            color: "var(--nl-text-primary)",
-            border: "1px solid var(--nl-border-subtle)",
-            borderRadius: "var(--nl-radius-md)",
-            resize: "vertical",
-            fontFamily: "inherit",
-            fontSize: "0.875rem",
-          }}
         />
-      </section>
+        </PanelBody>
+      </Panel>
 
       {featuredProposal && !batchMode ? (
         <ProposalReviewCard
diff --git a/web/src/app/globals.css b/web/src/app/globals.css
index c670255..cf54e43 100644
--- a/web/src/app/globals.css
+++ b/web/src/app/globals.css
@@ -80,8 +80,7 @@ button {
 
 .app-shell {
   min-height: 100vh;
-  display: grid;
-  grid-template-columns: 280px 1fr;
+  padding-left: 280px;
 }
 
 .sidebar {
@@ -95,6 +94,10 @@ button {
   padding: var(--nl-space-8);
 }
 
+.app-shell > .sidebar {
+  width: 280px;
+}
+
 .surface-card {
   border: 1px solid var(--nl-border-default);
   border-radius: var(--nl-radius-md);
@@ -135,7 +138,7 @@ button {
 
 @media (max-width: 980px) {
   .app-shell {
-    grid-template-columns: 1fr;
+    padding-left: 0;
   }
 
   .sidebar {
diff --git a/web/src/components/AgentTimeline.tsx b/web/src/components/AgentTimeline.tsx
index 9a79e4c..3718e92 100644
--- a/web/src/components/AgentTimeline.tsx
+++ b/web/src/components/AgentTimeline.tsx
@@ -1,23 +1,29 @@
+import { Panel, PanelHeader, PanelTitle, StatusBadge, Timeline } from "@/components/ui/Primitives";
 import type { AgentTimelineItem } from "@/lib/types";
 
 export function AgentTimeline({ items }: { items: AgentTimelineItem[] }) {
   return (
-    <section className="surface-card" style={{ padding: "var(--nl-space-5)", display: "grid", gap: "var(--nl-space-4)" }}>
-      <div style={{ display: "flex", justifyContent: "space-between", gap: "var(--nl-space-3)", alignItems: "center" }}>
-        <div style={{ fontWeight: 700 }}>Agent activity timeline</div>
-        <span className="badge">review UX</span>
-      </div>
-      {items.map((item) => (
-        <div key={item.id} className="surface-muted" style={{ padding: "var(--nl-space-4)", display: "grid", gap: "var(--nl-space-2)" }}>
-          <div style={{ display: "flex", justifyContent: "space-between", gap: "var(--nl-space-3)", flexWrap: "wrap" }}>
-            <strong>{item.actor}</strong>
-            <span style={{ color: "var(--nl-text-secondary)" }}>{item.timestamp}</span>
-          </div>
-          <div>{item.action}</div>
-          <div style={{ color: "var(--nl-text-secondary)" }}>{item.summary}</div>
-          <div className="badge" style={{ width: "fit-content" }}>{item.status}</div>
-        </div>
-      ))}
-    </section>
+    <Panel>
+      <PanelHeader>
+        <PanelTitle>Agent activity timeline</PanelTitle>
+        <StatusBadge status="review">review UX</StatusBadge>
+      </PanelHeader>
+      <Timeline
+        items={items.map((item) => ({
+          id: item.id,
+          title: item.actor,
+          description: (
+            <span>
+              {item.action}
+              <br />
+              {item.summary}
+            </span>
+          ),
+          meta: item.timestamp,
+          status: item.status,
+          tone: item.status === "rejected" ? "danger" : item.status === "approved" ? "success" : "info",
+        }))}
+      />
+    </Panel>
   );
 }
diff --git a/web/src/components/ProposalReviewCard.tsx b/web/src/components/ProposalReviewCard.tsx
index 77b7a14..cc2c1f9 100644
--- a/web/src/components/ProposalReviewCard.tsx
+++ b/web/src/components/ProposalReviewCard.tsx
@@ -1,3 +1,5 @@
+import { Button, DiffCard, Panel, PanelHeader, PanelTitle, StatusBadge } from "@/components/ui/Primitives";
+
 export function ProposalReviewCard({
   title,
   before,
@@ -14,51 +16,33 @@ export function ProposalReviewCard({
   isSubmitting?: boolean;
 }) {
   return (
-    <section className="surface-card" style={{ padding: "var(--nl-space-5)", display: "grid", gap: "var(--nl-space-4)" }}>
-      <div style={{ display: "flex", justifyContent: "space-between", gap: "var(--nl-space-3)", alignItems: "center" }}>
-        <div style={{ fontWeight: 700 }}>{title}</div>
+    <Panel>
+      <PanelHeader>
+        <PanelTitle>{title}</PanelTitle>
         <div style={{ display: "flex", gap: "var(--nl-space-2)", alignItems: "center", flexWrap: "wrap" }}>
-          <span className="badge">before / after</span>
+          <StatusBadge status="review">before / after</StatusBadge>
           {onReject ? (
-            <button
+            <Button
               type="button"
-              className="surface-muted"
+              variant="destructive"
               onClick={onReject}
               disabled={isSubmitting}
-              style={{ border: "1px solid var(--nl-border-subtle)", borderRadius: "var(--nl-radius-md)", padding: "8px 12px" }}
             >
               Reject
-            </button>
+            </Button>
           ) : null}
           {onApprove ? (
-            <button
+            <Button
               type="button"
               onClick={onApprove}
               disabled={isSubmitting}
-              style={{
-                border: "none",
-                borderRadius: "var(--nl-radius-md)",
-                padding: "8px 12px",
-                background: "var(--nl-accent-primary)",
-                color: "var(--nl-text-primary)",
-                fontWeight: 600,
-              }}
             >
               Approve
-            </button>
+            </Button>
           ) : null}
         </div>
-      </div>
-      <div style={{ display: "grid", gridTemplateColumns: "repeat(auto-fit, minmax(240px, 1fr))", gap: "var(--nl-space-4)" }}>
-        <div className="surface-muted" style={{ padding: "var(--nl-space-4)", display: "grid", gap: "var(--nl-space-2)" }}>
-          <strong>Before</strong>
-          <div style={{ color: "var(--nl-text-secondary)", whiteSpace: "pre-wrap" }}>{before}</div>
-        </div>
-        <div className="surface-muted" style={{ padding: "var(--nl-space-4)", display: "grid", gap: "var(--nl-space-2)" }}>
-          <strong>After</strong>
-          <div style={{ color: "var(--nl-text-secondary)", whiteSpace: "pre-wrap" }}>{after}</div>
-        </div>
-      </div>
-    </section>
+      </PanelHeader>
+      <DiffCard before={before} after={after} />
+    </Panel>
   );
 }