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/src/pty/env.dart

@@ -37,10 +37,10 @@ String _buildExpandedPath() {
   return [...missing, ...existing].join(':');
 }
 
-/// Base env clide's daemon builds for every PTY child. Callers merge
-/// with the user's environment before passing to `ptyc` — a child that
-/// needs user env like `HOME` / `USER` / `SHELL` still gets them; the
-/// keys here override the ones the child cares about.
+/// Base env clide builds for every PTY child. Callers merge with the
+/// user's environment — a child that needs user env like `HOME` /
+/// `USER` / `SHELL` still gets them; the keys here override the ones
+/// the child cares about.
 const Map<String, String> clidePtyEnvDefaults = {
   'TERM': 'xterm-256color',
   'COLORTERM': 'truecolor',