fix(control-ui): filter archived sessions (#77132)

Summary:
- Use sessions.list as the Control UI source of truth for available sessions.
- Hide archived sessions by default and keep the Sessions filter UI explicit, compact, and reversible.
- Preserve session-change behavior, checkpoint details, generated i18n output, and chat/session picker consistency.

Validation:
- pnpm ui:i18n:check
- pnpm test ui/src/styles/components.test.ts ui/src/ui/views/sessions.test.ts ui/src/ui/app-render.helpers.node.test.ts
- pnpm test ui/src/ui/controllers/sessions.test.ts ui/src/ui/app-gateway.sessions.node.test.ts ui/src/ui/views/sessions.test.ts ui/src/styles/components.test.ts ui/src/ui/app-render.helpers.node.test.ts
- pnpm tsgo:test:ui
- Blacksmith Testbox: pnpm check:changed -- <PR paths>

scripts/control-ui-i18n.ts

@@ -953,7 +953,35 @@ async function formatGeneratedTypeScript(filePath: string, source: string): Prom
       rejectOnFailure: true,
     },
   );
-  return result.stdout;
+  return restoreReplacementCorruptedStringLiterals(source, result.stdout);
+}
+
+function restoreReplacementCorruptedStringLiterals(source: string, formatted: string): string {
+  if (!formatted.includes("\uFFFD") || source.includes("\uFFFD")) {
+    return formatted;
+  }
+
+  const stringLiteralPattern = /"(?:\\.|[^"\\])*"/gu;
+  const sourceLiterals = [...source.matchAll(stringLiteralPattern)];
+  const formattedLiterals = [...formatted.matchAll(stringLiteralPattern)];
+  if (sourceLiterals.length !== formattedLiterals.length) {
+    return formatted;
+  }
+
+  let output = "";
+  let cursor = 0;
+  for (const [index, formattedLiteral] of formattedLiterals.entries()) {
+    const replacement = sourceLiterals[index]?.[0];
+    const literal = formattedLiteral[0];
+    const start = formattedLiteral.index;
+    if (replacement === undefined || start === undefined) {
+      return formatted;
+    }
+    output += formatted.slice(cursor, start);
+    output += literal.includes("\uFFFD") && !replacement.includes("\uFFFD") ? replacement : literal;
+    cursor = start + literal.length;
+  }
+  return `${output}${formatted.slice(cursor)}`;
 }
 
 type PendingPrompt = {