fix(telegram): stabilize reply dispatch runtime

Summary:
- Add a stable provider-dispatcher dist entry and legacy alias coverage for stale reply-dispatch chunks.
- Make Telegram reasoning stream previews transient after final delivery and harden visible-send reasoning sanitization.
- Document transient /reasoning stream behavior and credit @BunsDev in the changelog.

Verification:
- pnpm test src/agents/tools/message-tool.test.ts src/infra/tsdown-config.test.ts test/scripts/runtime-postbuild.test.ts extensions/telegram/src/bot-message-dispatch.test.ts src/plugin-sdk/channel-streaming.test.ts src/plugin-sdk/channel-entry-contract.test.ts
- OPENCLAW_VITEST_MAX_WORKERS=1 pnpm test src/channels/plugins/module-loader.test.ts src/plugin-sdk/channel-entry-contract.test.ts
- pnpm exec oxfmt --check --threads=1 <changed files>
- git diff --check
- pnpm build
- GitHub PR checks for b8b7a91834

docs/concepts/messages.md

@@ -166,7 +166,7 @@ OpenClaw can expose or hide model reasoning:
 
 - `/reasoning on|off|stream` controls visibility.
 - Reasoning content still counts toward token usage when produced by the model.
-- Telegram supports reasoning stream into the draft bubble.
+- Telegram supports reasoning stream into a transient draft bubble that is deleted after final delivery; use `/reasoning on` for persistent reasoning output.
 
 Details: [Thinking + reasoning directives](/tools/thinking) and [Token use](/reference/token-use).
 

docs/concepts/streaming.md

@@ -162,7 +162,7 @@ Telegram:
 - Uses `sendMessage` + `editMessageText` preview updates across DMs and group/topics.
 - Sends a fresh final message instead of editing in place when a preview has been visible for about one minute, then cleans up the preview so Telegram's timestamp reflects reply completion.
 - Preview streaming is skipped when Telegram block streaming is explicitly enabled (to avoid double-streaming).
-- `/reasoning stream` can write reasoning to preview.
+- `/reasoning stream` can write reasoning to a transient preview that is deleted after final delivery.
 
 Discord: