Merge branch 'master' into claude/unified-environment-credentials-c8841a

Master removed the TUI package, the `meta` and `upgrade` subcommands, and
`--config-replace`, and made raw `dsh` require a `--config` overlay. Resolved
onto that shape:

- Dropped this branch's TUI edits with the surface itself, including
  `tui.cordis.yml`, `runTui`, and the TUI keyless PTY smoke.
- Dropped the `--config-replace` plumbing rather than reintroducing a flag
  master deliberately removed. The gap this branch fixed remains: `dsh -p`
  still could not name its composition, so it keeps `--config`.
- Kept this branch's deletion of the personal `$DSH_HOME/config.yaml` layer,
  which master still carried, and provided the environment snapshot in the new
  raw `runConfig` surface alongside web and headless.
- Ported the headless shutdown PTY test off the personal overlay onto a named
  `--config` file, which is what proves that flag now exists on `-p`.

tsconfig.host.json

@@ -44,6 +44,12 @@
     "apps/web/tests/startup-auto-selection.e2e.ts",
     "apps/web/tests/subagent-conversation.e2e.ts",
     "apps/web/tests/bash-abort-row.e2e.ts",
+    "apps/web/tests/chat-scroll-fixture.ts",
+    "apps/web/tests/chat-scroll-contract.e2e.ts",
+    "apps/web/tests/chat-long-interactions.e2e.ts",
+    "apps/web/tests/chat-continuous-conversation.e2e.ts",
+    "apps/web/tests/complex-history.perf.ts",
+    "apps/web/stress-tests/reasoning-chunks.stress.ts",
     "apps/cli/tests/**/*.ts",
     "examples/*/src/**/*.ts",
     "examples/*/start.ts",
@@ -176,7 +182,6 @@
     { "path": "./packages/ui/app-boot" },
     { "path": "./packages/ui/jsonrpc" },
     { "path": "./packages/examples/jsonrpc-demo" },
-    { "path": "./packages/ui/tui" },
     { "path": "./packages/support/llm-replay" },
     { "path": "./packages/typert/generator" },
     { "path": "./packages/support/acp-snapshot" },