add a native startup banner to the empty Claude pane (T-149)

Replaces the bare "Waiting for Claude…" empty state with ClaudeBanner:
clide's own logo, a "Claude" label, the session role (primary /
secondary N), the workspace (home-collapsed), the tmux status line, and
a warming-up hint. ConversationView gains an optional emptyState widget;
the pane supplies the banner from data it already has.

Fully owned — no tmux capture-pane, no Anthropic artwork. The "Claude"
label uses Anthropic's published accent #d97757 nominatively; recorded
under a new trademark_notices section in assets/licenses.yaml (clide is
unaffiliated, bundles no Anthropic logo/artwork). Also fixes a stale
forkpty->pty reference in that file.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lib/builtin/claude/src/claude_banner.dart

@@ -0,0 +1,65 @@
+/// Native startup banner for the empty Claude pane (T-149).
+///
+/// Shown by [ConversationView] before any transcript items arrive — a
+/// clide-branded placeholder (clide's own logo) that orients the user:
+/// which session, which workspace, what status. The "Claude" label uses
+/// Anthropic's published accent colour ([claudeAccent], #d97757) purely
+/// to identify Claude — nominative use; clide bundles no Anthropic
+/// artwork (see assets/licenses.yaml trademark_notices).
+library;
+
+import 'dart:io' show Platform;
+
+import 'package:clide/builtin/claude/src/conversation_view.dart' show claudeAccent;
+import 'package:clide/widgets/widgets.dart';
+import 'package:flutter/widgets.dart';
+
+class ClaudeBanner extends StatelessWidget {
+  const ClaudeBanner({super.key, required this.role, this.workspace, this.statusLine});
+
+  /// Session role, e.g. `'primary'` or `'secondary 2'`.
+  final String role;
+
+  /// Repo root for this session (shown home-collapsed).
+  final String? workspace;
+
+  /// Status line, e.g. `'tmux · clide-claude-…'`.
+  final String? statusLine;
+
+  @override
+  Widget build(BuildContext context) {
+    final ws = _collapseHome(workspace);
+    return Center(
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          const ClideSvgView.asset('assets/logo/logo.svg', width: 60, height: 60),
+          const SizedBox(height: 18),
+          ClideText(
+            'Claude',
+            fontSize: clideFontDialogTitle,
+            color: claudeAccent,
+            fontWeight: FontWeight.w500,
+          ),
+          const SizedBox(height: 2),
+          ClideText(role, fontSize: clideFontSmall, muted: true, fontFamily: clideMonoFamily),
+          const SizedBox(height: 16),
+          if (ws != null) ClideText(ws, fontSize: clideFontCaption, muted: true),
+          if (statusLine != null) ...[
+            const SizedBox(height: 2),
+            ClideText(statusLine!, fontSize: clideFontSmall, muted: true, fontFamily: clideMonoFamily),
+          ],
+          const SizedBox(height: 16),
+          const ClideText('Warming up — your conversation will appear here.', fontSize: clideFontSmall, muted: true),
+        ],
+      ),
+    );
+  }
+
+  static String? _collapseHome(String? path) {
+    if (path == null) return null;
+    final home = Platform.environment['HOME'] ?? '';
+    if (home.isNotEmpty && path.startsWith(home)) return '~${path.substring(home.length)}';
+    return path;
+  }
+}

lib/builtin/claude/src/claude_pane.dart

@@ -7,6 +7,7 @@ import 'package:clide/widgets/widgets.dart';
 import 'package:flutter/services.dart' show rootBundle;
 import 'package:flutter/widgets.dart';
 
+import 'claude_banner.dart';
 import 'claude_composer.dart';
 import 'clipboard_paste.dart';
 import 'conversation_controller.dart';
@@ -46,6 +47,7 @@ class _ClaudePaneState extends State<ClaudePane> {
   String? _paneId;
   String? _sessionName;
   String? _sessionId;
+  String? _repoRoot;
   String? _error;
   String _statusLine = 'attaching…';
 
@@ -142,6 +144,7 @@ class _ClaudePaneState extends State<ClaudePane> {
     if (rootResp.ok) {
       repoRoot = (rootResp.data['path'] as String?) ?? repoRoot;
     }
+    _repoRoot = repoRoot;
 
     _sessionName = widget.isPrimary ? primarySessionName(repoRoot) : secondarySessionName(repoRoot, widget.secondaryIndex!);
     // Bind this pane to a specific Claude session id so concurrent
@@ -310,7 +313,16 @@ class _ClaudePaneState extends State<ClaudePane> {
     } else if (_conversation != null) {
       body = Column(
         children: [
-          Expanded(child: ConversationView(controller: _conversation!)),
+          Expanded(
+            child: ConversationView(
+              controller: _conversation!,
+              emptyState: ClaudeBanner(
+                role: widget.isPrimary ? 'primary' : 'secondary ${widget.secondaryIndex}',
+                workspace: _repoRoot,
+                statusLine: _statusLine,
+              ),
+            ),
+          ),
           ClaudeComposer(
             enabled: _paneId != null,
             onSubmit: _send,

lib/builtin/claude/src/conversation_view.dart

@@ -23,6 +23,7 @@ class ConversationView extends StatefulWidget {
     super.key,
     required this.controller,
     this.wrapInSelectionArea = true,
+    this.emptyState,
   });
 
   final ConversationController controller;
@@ -32,6 +33,10 @@ class ConversationView extends StatefulWidget {
   /// selection spans tiles — nesting SelectionAreas is illegal (T-140).
   final bool wrapInSelectionArea;
 
+  /// Shown while there are no items yet (e.g. the [ClaudeBanner] startup
+  /// banner). Defaults to a plain "Waiting for Claude…" hint.
+  final Widget? emptyState;
+
   @override
   State<ConversationView> createState() => _ConversationViewState();
 }
@@ -80,9 +85,7 @@ class _ConversationViewState extends State<ConversationView> {
     if (items.isEmpty) {
       return ColoredBox(
         color: tokens.panelBackground,
-        child: const Center(
-          child: ClideText('Waiting for Claude…', muted: true),
-        ),
+        child: widget.emptyState ?? const Center(child: ClideText('Waiting for Claude…', muted: true)),
       );
     }