diff --git a/frontend/dashboard.css b/frontend/dashboard.css
index c727ddb..41eacab 100644
--- a/frontend/dashboard.css
+++ b/frontend/dashboard.css
@@ -469,25 +469,26 @@ textarea { resize: vertical; min-height: 120px; }
 .issue-sheet-panel { width:min(560px,100%); height:100%; overflow:auto; padding:18px; background:#0b1526; border-left:1px solid #2a496e; }
 .issue-sheet-header { display:flex; align-items:center; justify-content:space-between; gap:10px; }
 .issue-sheet-header button { min-height:44px; }
-.mobile-issue-detail-nav { display:none; }
+.mobile-issue-detail-nav, .mobile-pull-detail-nav { display:none; }
 @media (max-width:600px) {
-  .issue-sheet-panel { padding-top:max(12px,env(safe-area-inset-top)); }
-  .mobile-issue-detail-nav {
+  .issue-sheet-panel, .pull-sheet-panel { padding-top:max(12px,env(safe-area-inset-top)); }
+  .mobile-issue-detail-nav, .mobile-pull-detail-nav {
     position:sticky; top:env(safe-area-inset-top); z-index:6;
     display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:4px;
     margin:8px -6px 12px; padding:6px;
     background:rgba(11,21,38,.98); border-block:1px solid #2a496e;
   }
-  .mobile-issue-detail-nav button {
+  .mobile-issue-detail-nav button, .mobile-pull-detail-nav button {
     min-width:0; min-height:44px; padding:4px; overflow-wrap:anywhere;
     border-color:transparent; font-size:12px;
   }
-  .mobile-issue-detail-nav button[aria-current="location"] {
+  .mobile-issue-detail-nav button[aria-current="location"], .mobile-pull-detail-nav button[aria-current="location"] {
     border-color:#60a5fa; background:#17365a; color:#fff;
   }
   #issue-overview, #issue-conversation, #issue-comment, #issue-planning { scroll-margin-top:72px; }
+  #pull-overview, #pull-conversation, #pull-comment, #pull-review { scroll-margin-top:72px; }
 }
-@media (min-width:601px) { .mobile-issue-detail-nav { display:none; } }
+@media (min-width:601px) { .mobile-issue-detail-nav, .mobile-pull-detail-nav { display:none; } }
 .completed-filed-actions { position:fixed; right:0; bottom:0; z-index:57; box-sizing:border-box; width:min(560px,100%); display:grid; grid-template-columns:minmax(0,1fr); align-items:center; gap:8px; margin:0; padding:10px 12px calc(10px + env(safe-area-inset-bottom)); border:1px solid #4ade80; border-radius:12px 0 0; background:rgba(11,21,38,.98); overflow-wrap:anywhere; }
 .completed-filed-actions[hidden] { display:none; }
 .completed-filed-actions button { min-height:44px; min-width:0; }
diff --git a/frontend/dashboard.js b/frontend/dashboard.js
index 0eb92ff..fc372c4 100644
--- a/frontend/dashboard.js
+++ b/frontend/dashboard.js
@@ -29,6 +29,20 @@
     prefersReducedMotion:() => window.matchMedia('(prefers-reduced-motion: reduce)').matches,
   });
   mobileIssueDetailNavigation.start();
+  const pullDetailPanel = qs('#pull-sheet .pull-sheet-panel');
+  const mobilePullDetailNavigation = createMobileIssueDetailNavigation({
+    root:pullDetailPanel,
+    buttons:Object.fromEntries(Array.from(document.querySelectorAll('[data-pull-section]')).map(button => [button.dataset.pullSection, button])),
+    targets:{
+      overview:qs('#pull-overview'),
+      conversation:qs('#pull-conversation'),
+      reply:qs('#pull-comment'),
+      review:qs('#pull-review'),
+    },
+    beforeNavigate:{review(target) { target.open = true; }},
+    prefersReducedMotion:() => window.matchMedia('(prefers-reduced-motion: reduce)').matches,
+  });
+  mobilePullDetailNavigation.start();
   [
     [qs('.app-menu'), qs('#app-menu-toggle')],
     [qs('.work-settings'), qs('#work-settings-toggle')],
diff --git a/frontend/index.html b/frontend/index.html
index 2e8eac5..3d3a878 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -1208,13 +1208,23 @@
       <div><div class="small" id="pull-sheet-key"></div><h3 id="pull-sheet-title">Assigned pull request</h3></div>
       <button id="close-pull-sheet" type="button">Close</button>
     </div>
-    <div id="pull-sheet-status" class="small" aria-live="polite">Choose a pull request.</div>
-    <button class="pull-retry" id="retry-pull-load" type="button" hidden>Retry loading pull request</button>
-    <div class="pull-sheet-content markdown-content" id="pull-sheet-body"></div>
-    <h2>Full conversation</h2><div id="pull-comments"></div>
-    <button class="conversation-more" id="load-older-pull-comments" type="button" hidden>Load older messages</button>
-    <div id="pull-conversation-status" class="small" aria-live="assertive"></div>
-    <button class="conversation-actions-retry" id="retry-pull-comment-actions" type="button" hidden>Retry comment tools</button>
+    <nav class="mobile-detail-nav mobile-pull-detail-nav" aria-label="Pull request sections">
+      <button type="button" data-pull-section="overview">Overview</button>
+      <button type="button" data-pull-section="conversation">Conversation</button>
+      <button type="button" data-pull-section="reply">Reply</button>
+      <button type="button" data-pull-section="review">Review &amp; merge</button>
+    </nav>
+    <div id="pull-overview">
+      <div id="pull-sheet-status" class="small" aria-live="polite">Choose a pull request.</div>
+      <button class="pull-retry" id="retry-pull-load" type="button" hidden>Retry loading pull request</button>
+      <div class="pull-sheet-content markdown-content" id="pull-sheet-body"></div>
+    </div>
+    <section id="pull-conversation" tabindex="-1">
+      <h2>Full conversation</h2><div id="pull-comments"></div>
+      <button class="conversation-more" id="load-older-pull-comments" type="button" hidden>Load older messages</button>
+      <div id="pull-conversation-status" class="small" aria-live="assertive"></div>
+      <button class="conversation-actions-retry" id="retry-pull-comment-actions" type="button" hidden>Retry comment tools</button>
+    </section>
     <section class="pull-comment-composer" aria-labelledby="pull-comment-title">
       <h2 id="pull-comment-title">Add comment</h2>
       <textarea id="pull-comment" maxlength="10000" placeholder="Write a comment"></textarea>
diff --git a/frontend/mobile-issue-detail-nav.js b/frontend/mobile-issue-detail-nav.js
index 79dfcec..deba34e 100644
--- a/frontend/mobile-issue-detail-nav.js
+++ b/frontend/mobile-issue-detail-nav.js
@@ -17,6 +17,8 @@ function createMobileIssueDetailNavigation(options) {
   function navigate(name) {
     const target = targets[name];
     if (!target) return false;
+    const prepare = options.beforeNavigate && options.beforeNavigate[name];
+    if (prepare) prepare(target);
     if (name === 'actions' && options.planning) options.planning.open = true;
     target.scrollIntoView({
       block: 'start',
diff --git a/tests/test_mobile_pull_detail_navigation.py b/tests/test_mobile_pull_detail_navigation.py
new file mode 100644
index 0000000..34922e6
--- /dev/null
+++ b/tests/test_mobile_pull_detail_navigation.py
@@ -0,0 +1,86 @@
+import json
+import subprocess
+from pathlib import Path
+
+FRONTEND = Path(__file__).resolve().parents[1] / "frontend"
+CONTROLLER = FRONTEND / "mobile-issue-detail-nav.js"
+
+
+def test_pull_navigation_prepares_review_before_scrolling_and_focuses_reply():
+    script = f"""
+const createNavigation = require({json.dumps(str(CONTROLLER))});
+class FakeElement {{
+  constructor(name) {{ this.name=name; this.listeners={{}}; this.attributes={{}}; this.open=false; this.focuses=0; this.scrolls=[]; }}
+  addEventListener(name, callback) {{ this.listeners[name]=callback; }}
+  removeEventListener(name) {{ delete this.listeners[name]; }}
+  setAttribute(name, value) {{ this.attributes[name]=value; }}
+  removeAttribute(name) {{ delete this.attributes[name]; }}
+  focus() {{ this.focuses += 1; }}
+  scrollIntoView(options) {{ this.scrolls.push({{...options, openWhenScrolled:this.open}}); }}
+}}
+const buttons = Object.fromEntries(['overview','conversation','reply','review'].map(name => [name,new FakeElement(name)]));
+const targets = Object.fromEntries(['overview','conversation','reply','review'].map(name => [name,new FakeElement(name)]));
+let prepared = [];
+const navigation = createNavigation({{
+  buttons, targets,
+  beforeNavigate:{{review(target) {{ prepared.push('review'); target.open=true; }}}},
+  prefersReducedMotion:() => true,
+}});
+navigation.start();
+navigation.navigate('reply');
+navigation.navigate('review');
+process.stdout.write(JSON.stringify({{
+  replyFocuses:targets.reply.focuses,
+  reviewScrolls:targets.review.scrolls,
+  prepared,
+  current:Object.fromEntries(Object.entries(buttons).map(([name,button]) => [name,button.attributes['aria-current'] || null])),
+}}));
+"""
+    result = subprocess.run(["node", "-e", script], capture_output=True, text=True)
+
+    assert result.returncode == 0, result.stderr
+    assert json.loads(result.stdout) == {
+        "replyFocuses": 1,
+        "reviewScrolls": [{"block": "start", "behavior": "auto", "openWhenScrolled": True}],
+        "prepared": ["review"],
+        "current": {
+            "overview": None,
+            "conversation": None,
+            "reply": None,
+            "review": "location",
+        },
+    }
+
+
+def test_pull_sheet_wires_four_workspace_destinations_to_existing_lazy_review():
+    html = (FRONTEND / "index.html").read_text()
+    dashboard_js = (FRONTEND / "dashboard.js").read_text()
+
+    assert '<nav class="mobile-detail-nav mobile-pull-detail-nav"' in html
+    assert 'aria-label="Pull request sections"' in html
+    for name, label in (
+        ("overview", "Overview"),
+        ("conversation", "Conversation"),
+        ("reply", "Reply"),
+        ("review", "Review &amp; merge"),
+    ):
+        assert f'data-pull-section="{name}"' in html
+        assert f">{label}</button>" in html
+    assert 'id="pull-overview"' in html
+    assert 'id="pull-conversation"' in html
+    assert 'id="pull-comment"' in html
+    assert 'id="pull-review"' in html
+    assert "document.querySelectorAll('[data-pull-section]')" in dashboard_js
+    assert "beforeNavigate:{review(target) { target.open = true; }}" in dashboard_js
+
+
+def test_pull_workspace_rail_has_phone_containment_and_desktop_visibility_contracts():
+    css = (FRONTEND / "dashboard.css").read_text()
+
+    assert "@media (max-width:600px)" in css
+    assert ".mobile-issue-detail-nav, .mobile-pull-detail-nav" in css
+    assert "position:sticky; top:env(safe-area-inset-top)" in css
+    assert "grid-template-columns:repeat(4,minmax(0,1fr))" in css
+    assert "min-width:0; min-height:44px" in css
+    assert "#pull-overview, #pull-conversation, #pull-comment, #pull-review { scroll-margin-top:72px; }" in css
+    assert "@media (min-width:601px) { .mobile-issue-detail-nav, .mobile-pull-detail-nav { display:none; } }" in css