remove dissolved daemon, retire ptyc, fix golden cross-platform

Complete three overdue cleanups discovered during macOS health check:

D-56 daemon dissolution: delete bin/clide.dart, DaemonServer,
and orphaned tests (test/cli/, subprocess_test, in_process_test).
Update stale "clide --daemon" references in i18n catalogs, error
messages, editor_commands, CI scripts, and decision records.

ptyc retirement: delete ptyc/ source tree, PtySession, scm_rights.
Remove from Toolchain resolution, ToolCheck gate, backend
serialization, testmode harness, Makefile, CI, and sandbox
entitlements. PTY spawning uses NativePty (Dart FFI forkpty) since
the terminal was absorbed in-tree. D-5 amended.

Golden tests: wire the existing but never-applied clideGoldenConfig
via flutter_test_config.dart. Disable CI goldens (Skia anti-aliasing
differs between macOS/Linux even with Ahem). Keep platform-keyed
goldens only — goldens/linux/ and goldens/macos/ each run on their
own OS.

Test suite: 826 pass, 0 fail on macOS (was 829 pass, 11 fail).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/kernel/src/toolchain.dart

@@ -16,7 +16,6 @@ class ResolvedPaths {
     this.git,
     this.pql,
     this.tmux,
-    this.ptyc,
     this.shell,
     this.gitEnv,
   });
@@ -24,7 +23,6 @@ class ResolvedPaths {
   final String? git;
   final String? pql;
   final String? tmux;
-  final String? ptyc;
   final String? shell;
   final Map<String, String>? gitEnv;
 }
@@ -33,7 +31,6 @@ class Toolchain extends ChangeNotifier {
   String? _git;
   String? _pql;
   String? _tmux;
-  String? _ptyc;
   String? _shell;
   Map<String, String>? _gitEnv;
   bool _resolved = false;
@@ -41,7 +38,6 @@ class Toolchain extends ChangeNotifier {
   String get git => _git ?? 'git';
   String get pql => _pql ?? 'pql';
   String get tmux => _tmux ?? 'tmux';
-  String get ptyc => _ptyc ?? 'ptyc';
   String get shell => _shell ?? '/bin/bash';
 
   /// Extra environment variables for git (e.g. GIT_EXEC_PATH for dugite).
@@ -76,7 +72,6 @@ class Toolchain extends ChangeNotifier {
     _git = p.git;
     _pql = p.pql;
     _tmux = p.tmux;
-    _ptyc = p.ptyc;
     _shell = p.shell;
     _gitEnv = p.gitEnv;
     _resolved = true;
@@ -106,20 +101,10 @@ class Toolchain extends ChangeNotifier {
     final tmux = _findOnPath('tmux');
     final shell = _findOnPath(Platform.environment['SHELL']?.split('/').last ?? 'bash');
 
-    final ptyc = _firstExisting([
-          '$workspaceRoot/ptyc/bin/ptyc',
-          '$workspaceRoot/native/linux-x64/ptyc',
-          '$workspaceRoot/native/macos-arm64/ptyc',
-          '$workspaceRoot/native/macos-x64/ptyc',
-          if (Platform.environment['HOME'] case final home?) '$home/.local/bin/ptyc',
-        ]) ??
-        _findOnPath('ptyc');
-
     return ResolvedPaths(
       git: git,
       pql: pql,
       tmux: tmux,
-      ptyc: ptyc,
       shell: shell,
       gitEnv: gitEnv,
     );
@@ -182,14 +167,6 @@ ResolvedPaths resolveToolchainPaths(String workspaceRoot) {
     git: git,
     pql: _findOnPathStandalone('pql'),
     tmux: _findOnPathStandalone('tmux'),
-    ptyc: _firstExistingStandalone([
-          '$workspaceRoot/ptyc/bin/ptyc',
-          '$workspaceRoot/native/linux-x64/ptyc',
-          '$workspaceRoot/native/macos-arm64/ptyc',
-          '$workspaceRoot/native/macos-x64/ptyc',
-          if (Platform.environment['HOME'] case final home?) '$home/.local/bin/ptyc',
-        ]) ??
-        _findOnPathStandalone('ptyc'),
     shell: _findOnPathStandalone(Platform.environment['SHELL']?.split('/').last ?? 'bash'),
     gitEnv: gitEnv,
   );