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/backend_entry.dart

@@ -45,8 +45,8 @@ void backendEntry(BackendBootMessage boot) {
   late Toolchain toolchain;
 
   // Phase 1: resolve toolchain — just find binaries, don't init services.
-  // We need a project root for ptyc/dugite paths. Use a sensible
-  // default; the real project comes from project.open.
+  // We need a project root for dugite paths. Use a sensible default;
+  // the real project comes from project.open.
   final resolveRoot = boot.hintRoot ?? Platform.environment['HOME'] ?? '/tmp';
   toolchain = Toolchain();
   toolchain.applyResolved(resolveToolchainPaths(resolveRoot));
@@ -78,7 +78,7 @@ void backendEntry(BackendBootMessage boot) {
       final workDir = Directory(projectPath);
 
       // Re-resolve toolchain with the actual project root (finds
-      // dugite in native/dugite/, ptyc in ptyc/bin/, etc.)
+      // dugite in native/dugite/, etc.)
       toolchain = Toolchain();
       toolchain.applyResolved(resolveToolchainPaths(projectPath));
 
@@ -138,7 +138,6 @@ Map<String, Object?> _serializeToolchain(Toolchain tc) => {
       'git': tc.git,
       'pql': tc.pql,
       'tmux': tc.tmux,
-      'ptyc': tc.ptyc,
       'shell': tc.shell,
       'gitEnv': tc.gitEnv,
       'missing': tc.missing,