Add app source and tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

lib/Peach/designs/OutputSheet.dart

@@ -0,0 +1,70 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import '../about/internal/application/TextType.dart';
+import '../utils/Colors.dart';
+import 'text/Text.dart';
+
+/// A scrollable, copyable console sheet for one-shot command output — docker
+/// logs, a kafka describe, a redis value. Raised from a screen rather than
+/// pushed, because the output is a peek, not a destination.
+void showOutputSheet(BuildContext context, String title, String output) {
+  final jp = context.jp;
+  showModalBottomSheet(
+    context: context,
+    isScrollControlled: true,
+    backgroundColor: jp.surface,
+    shape: const RoundedRectangleBorder(
+      borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
+    ),
+    builder: (sheetContext) => SizedBox(
+      height: MediaQuery.of(sheetContext).size.height * 0.7,
+      child: Padding(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Row(
+              children: [
+                Expanded(child: text(title, 16, TextType.Bold, color: jp.text)),
+                IconButton(
+                  tooltip: 'Copy',
+                  onPressed: () {
+                    Clipboard.setData(ClipboardData(text: output));
+                    ScaffoldMessenger.of(
+                      sheetContext,
+                    ).showSnackBar(const SnackBar(content: Text('Copied.')));
+                  },
+                  icon: const Icon(Icons.copy_all, size: 18),
+                ),
+              ],
+            ),
+            const SizedBox(height: 8),
+            Expanded(
+              child: Container(
+                width: double.infinity,
+                padding: const EdgeInsets.all(12),
+                decoration: BoxDecoration(
+                  color: jp.consoleBg,
+                  borderRadius: BorderRadius.circular(12),
+                  border: Border.all(color: ConsoleColors.frame),
+                ),
+                child: SingleChildScrollView(
+                  child: SelectableText(
+                    output,
+                    style: const TextStyle(
+                      fontFamily: 'monospace',
+                      fontSize: 12.5,
+                      height: 1.4,
+                      color: ConsoleColors.body,
+                    ),
+                  ),
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    ),
+  );
+}