feat(frontend): Improve System page and TransactionsTable UX.

System page improvements:
- Add View Logs button to each sync operation with modal dialog
- Implement responsive design for mobile devices
- Remove redundant error count indicators
- Show full transaction text on mobile ("X new transactions")

TransactionsTable improvements:
- Use display_name instead of name • institution_id format
- Show only clean account display names in transaction rows

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/components/System.tsx

@@ -1,4 +1,5 @@
 import { useQuery } from "@tanstack/react-query";
+import { useState } from "react";
 import {
   RefreshCw,
   AlertCircle,
@@ -7,6 +8,7 @@ import {
   Clock,
   TrendingUp,
   User,
+  FileText,
 } from "lucide-react";
 import { apiClient } from "../lib/api";
 import {
@@ -19,7 +21,73 @@ import {
 import { Alert, AlertDescription, AlertTitle } from "./ui/alert";
 import { Button } from "./ui/button";
 import { Badge } from "./ui/badge";
-import type { SyncOperationsResponse } from "../types/api";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+  DialogTrigger,
+} from "./ui/dialog";
+import { ScrollArea } from "./ui/scroll-area";
+import type { SyncOperationsResponse, SyncOperation } from "../types/api";
+
+// Component for viewing sync operation logs
+function LogsDialog({ operation }: { operation: SyncOperation }) {
+  return (
+    <Dialog>
+      <DialogTrigger asChild>
+        <Button variant="outline" size="sm" className="shrink-0">
+          <FileText className="h-3 w-3 mr-1" />
+          <span className="hidden sm:inline">View Logs</span>
+          <span className="sm:hidden">Logs</span>
+        </Button>
+      </DialogTrigger>
+      <DialogContent className="max-w-4xl max-h-[80vh]">
+        <DialogHeader>
+          <DialogTitle>Sync Operation Logs</DialogTitle>
+          <DialogDescription>
+            Operation #{operation.id} - Started at{" "}
+            {new Date(operation.started_at).toLocaleString()}
+          </DialogDescription>
+        </DialogHeader>
+        <ScrollArea className="h-[60vh] w-full rounded border p-4">
+          <div className="space-y-2">
+            {operation.logs.length === 0 ? (
+              <p className="text-muted-foreground text-sm">No logs available</p>
+            ) : (
+              operation.logs.map((log, index) => (
+                <div
+                  key={index}
+                  className="text-sm font-mono bg-muted/50 p-2 rounded text-wrap break-all"
+                >
+                  {log}
+                </div>
+              ))
+            )}
+          </div>
+          {operation.errors.length > 0 && (
+            <>
+              <div className="mt-4 mb-2 text-sm font-semibold text-destructive">
+                Errors:
+              </div>
+              <div className="space-y-2">
+                {operation.errors.map((error, index) => (
+                  <div
+                    key={index}
+                    className="text-sm font-mono bg-destructive/10 border border-destructive/20 p-2 rounded text-wrap break-all text-destructive"
+                  >
+                    {error}
+                  </div>
+                ))}
+              </div>
+            </>
+          )}
+        </ScrollArea>
+      </DialogContent>
+    </Dialog>
+  );
+}
 
 export default function System() {
   const {
@@ -111,8 +179,10 @@ export default function System() {
                 return (
                   <div
                     key={operation.id}
-                    className="flex items-center justify-between p-4 border rounded-lg hover:bg-accent transition-colors"
+                    className="border rounded-lg hover:bg-accent transition-colors"
                   >
+                    {/* Desktop Layout */}
+                    <div className="hidden md:flex items-center justify-between p-4">
                       <div className="flex items-center space-x-4">
                         <div
                           className={`p-2 rounded-full ${
@@ -156,6 +226,7 @@ export default function System() {
                           </div>
                         </div>
                       </div>
+                      <div className="flex items-center space-x-4">
                         <div className="text-right text-sm text-muted-foreground">
                           <div className="flex items-center space-x-2">
                             <User className="h-3 w-3" />
@@ -167,13 +238,70 @@ export default function System() {
                               {operation.transactions_added} new transactions
                             </span>
                           </div>
-                      {operation.errors.length > 0 && (
-                        <div className="flex items-center space-x-2 mt-1 text-red-600">
-                          <AlertCircle className="h-3 w-3" />
-                          <span>{operation.errors.length} errors</span>
                         </div>
+                        <LogsDialog operation={operation} />
+                      </div>
+                    </div>
+
+                    {/* Mobile Layout */}
+                    <div className="md:hidden p-4 space-y-3">
+                      <div className="flex items-start justify-between">
+                        <div className="flex items-center space-x-3">
+                          <div
+                            className={`p-2 rounded-full ${
+                              isRunning
+                                ? "bg-blue-100 text-blue-600"
+                                : operation.success
+                                  ? "bg-green-100 text-green-600"
+                                  : "bg-red-100 text-red-600"
+                            }`}
+                          >
+                            {isRunning ? (
+                              <RefreshCw className="h-4 w-4 animate-spin" />
+                            ) : operation.success ? (
+                              <CheckCircle className="h-4 w-4" />
+                            ) : (
+                              <AlertCircle className="h-4 w-4" />
                             )}
                           </div>
+                          <div>
+                            <h4 className="text-sm font-medium text-foreground">
+                              {isRunning
+                                ? "Sync Running"
+                                : operation.success
+                                  ? "Sync Completed"
+                                  : "Sync Failed"}
+                            </h4>
+                            <Badge variant="outline" className="text-xs mt-1">
+                              {operation.trigger_type}
+                            </Badge>
+                          </div>
+                        </div>
+                        <LogsDialog operation={operation} />
+                      </div>
+
+                      <div className="text-xs text-muted-foreground space-y-2">
+                        <div className="flex items-center space-x-1">
+                          <Clock className="h-3 w-3" />
+                          <span>
+                            {startedAt.toLocaleDateString()}{" "}
+                            {startedAt.toLocaleTimeString()}
+                          </span>
+                          {duration && <span className="ml-2">• {duration}</span>}
+                        </div>
+
+                        <div className="grid grid-cols-2 gap-2 text-xs">
+                          <div className="flex items-center space-x-1">
+                            <User className="h-3 w-3" />
+                            <span>{operation.accounts_processed} accounts</span>
+                          </div>
+                          <div className="flex items-center space-x-1">
+                            <TrendingUp className="h-3 w-3" />
+                            <span>{operation.transactions_added} new transactions</span>
+                          </div>
+                        </div>
+                      </div>
+                    </div>
                   </div>
                 );
               })}

frontend/src/components/TransactionsTable.tsx

@@ -190,8 +190,7 @@ export default function TransactionsTable() {
               <div className="text-xs text-muted-foreground space-y-1">
                 {account && (
                   <p className="truncate">
-                    {account.name || "Unnamed Account"} •{" "}
+                    {account.display_name || "Unnamed Account"}
-                    {account.institution_id}
                   </p>
                 )}
                 {(transaction.creditor_name || transaction.debtor_name) && (
@@ -486,8 +485,7 @@ export default function TransactionsTable() {
                             <div className="text-xs text-muted-foreground space-y-1 mt-1">
                               {account && (
                                 <p className="break-words">
-                                  {account.name || "Unnamed Account"} •{" "}
+                                  {account.display_name || "Unnamed Account"}
-                                  {account.institution_id}
                                 </p>
                               )}
                               {(transaction.creditor_name ||

frontend/src/components/ui/scroll-area.tsx

@@ -0,0 +1,21 @@
+import * as React from "react";
+import { cn } from "../../lib/utils";
+
+const ScrollArea = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, children, ...props }, ref) => (
+  <div
+    ref={ref}
+    className={cn(
+      "relative overflow-auto scrollbar-thin scrollbar-thumb-gray-300 scrollbar-track-gray-100",
+      className
+    )}
+    {...props}
+  >
+    {children}
+  </div>
+));
+ScrollArea.displayName = "ScrollArea";
+
+export { ScrollArea };