fix(ui): strip injected inbound metadata from user messages in history (#22142)

* fix(ui): strip injected inbound metadata from user messages in history

Fixes #21106
Fixes #21109
Fixes #22116

OpenClaw prepends structured metadata blocks ("Conversation info",
"Sender:", reply-context) to user messages before sending them to the
LLM. These blocks are intentionally AI-context-only and must never reach
the chat history that users see.

Root cause:
`buildInboundUserContextPrefix` in `inbound-meta.ts` prepends the
blocks directly to the stored user message content string, so they are
persisted verbatim and later shown in webchat, TUI, and every other
rendering surface.

Fix:
• `src/auto-reply/reply/strip-inbound-meta.ts` — new utility with a
  6-sentinel fast-path strip (zero-alloc on miss) + 9-test suite.
• `src/tui/tui-session-actions.ts` — wraps `chatLog.addUser(...)` with
  `stripInboundMetadata()` so the TUI never stores the prefix.
• `ui/src/ui/chat/message-normalizer.ts` — strips user-role text content
  items during normalisation so webchat renders clean messages.

* fix(ui): strip inbound metadata for user messages in display path

* test: fix discord component send test spread typing

* fix: strip inbound metadata from mac chat history decode

* fix: align Swift metadata stripping parser with TS implementation

* fix: normalize line endings in inbound metadata stripper

* chore: document Swift/TS metadata-sentinel ownership

* chore: update changelog for inbound metadata strip fix

* changelog: credit Mellowambience for 22142

---------

Co-authored-by: Vincent Koc <vincentkoc@ieee.org>

src/tui/tui-session-actions.ts

@@ -1,4 +1,5 @@
 import type { TUI } from "@mariozechner/pi-tui";
+import { stripInboundMetadata } from "../auto-reply/reply/strip-inbound-meta.js";
 import type { SessionsPatchResult } from "../gateway/protocol/index.js";
 import {
   normalizeAgentId,
@@ -326,7 +327,7 @@ export function createSessionActions(context: SessionActionContext) {
         if (message.role === "user") {
           const text = extractTextFromMessage(message);
           if (text) {
-            chatLog.addUser(text);
+            chatLog.addUser(stripInboundMetadata(text));
           }
           continue;
         }