fix(tui): strip inbound metadata blocks from user messages (clean rewrite) (#22345)

* fix(tui): strip inbound metadata blocks from user text

* chore: clean up metadata-strip format and changelog credit

* chore: format tui metadata-strip tests

* test: align metadata-strip regression expectations

* refactor: reuse canonical inbound metadata stripper

* test: allow tmp media fixture paths in media-understanding tests

* refactor: reuse canonical inbound metadata stripper

* format: fix changelog blank line after headings

* test: fix unrelated check typing regressions

* test: align memory async mock embedding signatures

* test: avoid tsgo mock typing pitfall

* test: restore async search mock typings in merge tree

* test: trigger ci rerun without behavior change

* chore: dedupe todays changelog entries

* fix: dedupe sqlite mock keys in qmd manager test

* Update qmd-manager.test.ts

* test: align chat metadata sanitization expectation

src/gateway/server.chat.gateway-server-chat-b.e2e.test.ts

@@ -150,6 +150,7 @@ describe("gateway server chat", () => {
         let capturedOpts: GetReplyOptions | undefined;
         spy.mockImplementationOnce(async (_ctx: unknown, opts?: GetReplyOptions) => {
           capturedOpts = opts;
+          return undefined;
         });
 
         const sendRes = await rpcReq(ws, "chat.send", {
@@ -314,6 +315,7 @@ describe("gateway server chat", () => {
             { once: true },
           );
         });
+        return undefined;
       });
 
       const sendResP = onceMessage(ws, (o) => o.type === "res" && o.id === "send-abort-1", 8_000);