opentui(phase3): launcher integration — HERMES_TUI_ENGINE dual-engine

hermes --tui launches the native OpenTUI engine (Bun) when
HERMES_TUI_ENGINE=opentui (env) or display.tui_engine=opentui (config);
Ink stays the default and the shipping path is untouched.

- _resolve_tui_engine() (env > config > ink); refuses opentui on
  Windows/Termux (no Bun) -> falls back to ink with a notice.
- _make_opentui_argv() -> [bun, src/entry.real.tsx] (no build step).
- _bun_bin() with HERMES_BUN override.
- Branch at top of _make_tui_argv BEFORE _ensure_tui_node (Bun-only host
  must not bootstrap Node).
- Gate _launch_tui NODE_OPTIONS/--max-old-space-size on engine==ink (Bun
  is JSC; the V8 flag errors/ignores).

Verified end-to-end via tmux: real hermes --tui -> Bun -> OpenTUI ->
real Python gateway streamed a real reply. No-flag default still ink.

plugins/platforms/simplex/plugin.yaml

@@ -1,7 +1,7 @@
 name: simplex-platform
 label: SimpleX Chat
 kind: platform
-version: 1.1.0
+version: 1.0.0
 description: >
   SimpleX Chat gateway adapter for Hermes Agent.
   Connects to a local simplex-chat daemon via WebSocket and relays
@@ -9,7 +9,7 @@ description: >
   SimpleX is decentralised and assigns no persistent user IDs —
   every contact is an opaque internal ID generated at connection
   time, making it one of the most private messengers available.
-author: Mibayy, jooray
+author: Mibayy
 # ``requires_env`` and ``optional_env`` entries are surfaced in the
 # ``hermes config`` UI via the platform-plugin env var injector in
 # ``hermes_cli/config.py``.
@@ -27,18 +27,6 @@ optional_env:
     description: "Allow any contact to talk to the bot (dev only — disables allowlist)"
     prompt: "Allow all contacts? (true/false)"
     password: false
-  - name: SIMPLEX_AUTO_ACCEPT
-    description: "Auto-accept incoming contact requests (default: true)"
-    prompt: "Auto-accept contact requests? (true/false)"
-    password: false
-  - name: SIMPLEX_GROUP_ALLOWED
-    description: >-
-      Comma-separated SimpleX group IDs the bot should participate in, or
-      '*' to allow any group. Omit to ignore group messages entirely
-      (safer default — a bot in a group otherwise processes every
-      member's traffic).
-    prompt: "Allowed group IDs (comma-separated, or '*' for any)"
-    password: false
   - name: SIMPLEX_HOME_CHANNEL
     description: "Default contact/group ID for cron / notification delivery"
     prompt: "Home channel contact/group ID (or empty)"
@@ -47,10 +35,3 @@ optional_env:
     description: "Human label for the home channel (defaults to the ID)"
     prompt: "Home channel display name (or empty)"
     password: false
-  - name: HERMES_SIMPLEX_TEXT_BATCH_DELAY
-    description: >-
-      Quiet-period seconds (default: 0.8) used to concatenate rapid-fire
-      inbound text messages into a single MessageEvent — same pattern as
-      Telegram's text batching.
-    prompt: "Text batch flush delay in seconds (default 0.8)"
-    password: false