refactor: consolidate requests and finalize agent tool states

Share project JSON transport, interaction replies and report selectors.
Settle tool progress consistently for direct streams, reconnects and history, preserving failure reasons and stopped state.

scripts/export-answer-ui-contract.mjs

@@ -1,11 +1,13 @@
 import process from "node:process";
-import { writeFile } from "node:fs/promises";
+import { readFile, writeFile } from "node:fs/promises";
 import { resolve } from "node:path";
 import { zodToJsonSchema } from "zod-to-json-schema";
 import { answerUiCatalog, ANSWER_UI_VERSION } from "../src/features/agent/answer-ui/catalog.ts";
 
-const targets = process.argv[2]
-  ? [resolve(process.argv[2])]
+const check = process.argv.includes("--check");
+const destination = process.argv.slice(2).find((arg) => arg !== "--check");
+const targets = destination
+  ? [resolve(destination)]
   : [
       resolve("../next-tjwater-agent/src/chat/answer-ui-catalog.json"),
       resolve("../next-tjwater-server/contracts/answer-ui-catalog.json")
@@ -23,7 +25,12 @@ const contract = {
     ])
   )
 };
+const content = `${JSON.stringify(contract, null, 2)}\n`;
 for (const target of targets) {
-  await writeFile(target, `${JSON.stringify(contract, null, 2)}\n`);
-  process.stdout.write(`Exported ${contract.components.length} components to ${target}\n`);
+  if (check) {
+    if (await readFile(target, "utf8") !== content) throw new Error(`Answer UI contract differs: ${target}`);
+  } else {
+    await writeFile(target, content);
+  }
+  process.stdout.write(`${check ? "Checked" : "Exported"} ${contract.components.length} components ${check ? "in" : "to"} ${target}\n`);
 }