Improve mobile git views and concurrent rendering safety

- Pass the `origin` parameter through history and PR redirect routes.
- Move source control panel ref updates to `useEffect` to prevent side
  effects during concurrent renders.
- Resolve commit file changes to empty if disconnected to avoid a stuck
  loading spinner.
- Standardize PR sidebar header button styling and accessibility labels.

mobile/app/h/[hostId]/history/[worktreeId].tsx

@@ -9,6 +9,7 @@ export default function HistoryRedirect() {
     hostId?: string | string[]
     worktreeId?: string | string[]
     name?: string | string[]
+    origin?: string | string[]
   }>()
   return (
     <Redirect
@@ -18,6 +19,7 @@ export default function HistoryRedirect() {
           hostId: firstParam(params.hostId),
           worktreeId: firstParam(params.worktreeId),
           name: firstParam(params.name),
+          origin: firstParam(params.origin),
           tab: 'history'
         }
       }}

mobile/app/h/[hostId]/pr/[worktreeId].tsx

@@ -10,6 +10,7 @@ export default function PrRedirect() {
     hostId?: string | string[]
     worktreeId?: string | string[]
     name?: string | string[]
+    origin?: string | string[]
   }>()
   return (
     <Redirect
@@ -19,6 +20,7 @@ export default function PrRedirect() {
           hostId: firstParam(params.hostId),
           worktreeId: firstParam(params.worktreeId),
           name: firstParam(params.name),
+          origin: firstParam(params.origin),
           tab: 'pr'
         }
       }}

mobile/src/components/pr-sidebar/PRSidebarHeader.tsx

@@ -55,8 +55,8 @@ export function PRSidebarHeader({ pr, details, titleAction }: Props) {
               onPress={openPr}
               hitSlop={8}
               accessibilityRole="link"
-              accessibilityLabel={`Open pull request #${pr.number} on the web`}
-              style={({ pressed }) => [styles.openWebButton, pressed && { opacity: 0.6 }]}
+              accessibilityLabel={`Open pull request #${pr.number} in browser`}
+              style={({ pressed }) => [styles.iconButton, pressed && { opacity: 0.6 }]}
             >
               <ExternalLink size={16} color={colors.textSecondary} strokeWidth={2.2} />
             </Pressable>

mobile/src/components/pr-sidebar/mobile-pr-sidebar-styles.ts

@@ -75,13 +75,6 @@ export const mobilePrSidebarStyles = StyleSheet.create({
     fontSize: typography.metaSize,
     fontWeight: '700'
   },
-  openWebButton: {
-    minWidth: 32,
-    minHeight: 32,
-    alignItems: 'center',
-    justifyContent: 'center',
-    borderRadius: radii.button
-  },
   prTitle: {
     color: colors.textPrimary,
     fontSize: typography.titleSize,

mobile/src/source-control/MobileGitHistoryList.tsx

@@ -99,7 +99,14 @@ export const MobileGitHistoryList = memo(function MobileGitHistoryList({
     (row: MobileCommitRow) => {
       const next = expanded === row.id ? null : row.id
       setExpanded(next)
-      if (next && client && !filesById[row.id]) {
+      if (next && !filesById[row.id]) {
+        // No client (disconnected while cached rows stay visible): resolve to an
+        // empty file list so the row shows "No file changes" instead of a spinner
+        // that never completes — no request can be made.
+        if (!client) {
+          setFilesById((prev) => ({ ...prev, [row.id]: [] }))
+          return
+        }
         setFilesById((prev) => ({ ...prev, [row.id]: 'loading' }))
         void client
           .sendRequest('git.commitCompare', { worktree: `id:${worktreeId}`, commitId: row.id })

mobile/src/source-control/MobileSourceControlPanel.tsx

@@ -133,12 +133,16 @@ export function MobileSourceControlPanel({
   }, [worktreeId])
   const statusBranch = status?.branch ?? null
   const statusHead = status?.head ?? branchCompareResult?.summary.headOid ?? null
-  if (statusBranch) {
-    lastPrBranchRef.current = statusBranch
-  }
-  if (statusHead) {
-    lastPrHeadRef.current = statusHead
-  }
+  // Write last-known identity in an effect, not the render body: a discarded
+  // concurrent render must not leave the fallback holding a never-committed value.
+  useEffect(() => {
+    if (statusBranch) {
+      lastPrBranchRef.current = statusBranch
+    }
+    if (statusHead) {
+      lastPrHeadRef.current = statusHead
+    }
+  }, [statusBranch, statusHead])
   const prBranch = statusBranch ?? lastPrBranchRef.current
   const prHeadSha = statusHead ?? lastPrHeadRef.current
   const prController = useMobilePrSidebarController({