diff --git a/frontend/src/app/globals.css b/frontend/src/app/globals.css
index 18da97d6..4fee4bb5 100644
--- a/frontend/src/app/globals.css
+++ b/frontend/src/app/globals.css
@@ -412,6 +412,11 @@ button:disabled { cursor: default; opacity: .45; }
 .birth-time-confirmation-panel { display: grid; gap: var(--space-3); padding: var(--space-4); border-left: 2px solid var(--color-action); background: var(--color-action-soft); }
 .birth-time-confirmation-panel > b { color: var(--color-ink); font-size: var(--type-body-sm); }
 .birth-time-confirmation-panel > p { margin: 0; color: var(--color-ink-secondary); font-size: var(--type-caption); line-height: 1.6; word-break: keep-all; overflow-wrap: break-word; }
+.birth-time-next-step { box-sizing: border-box; width: 100%; display: grid; gap: var(--space-3); padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-action-soft); }
+.birth-time-next-step > b { color: var(--color-ink); }
+.birth-time-next-step > p { margin: 0; color: var(--color-ink-secondary); }
+.birth-time-next-step > .birth-time-guided-action { width: 100%; min-height: 48px; }
+.birth-time-next-step > .form-error { width: 100%; color: var(--color-danger); }
 .birth-time-retry-card { display: grid; justify-items: start; gap: var(--space-3); }
 .birth-time-retry-card p { margin: 0; color: var(--color-ink-secondary); font-size: var(--type-body-sm); line-height: 1.6; }
 .birth-time-guide-turn, .birth-time-evidence-draft-card, .birth-time-scoring-status, .birth-time-candidate-terminal { min-width: 0; max-width: 100%; display: grid; gap: var(--space-4); }
diff --git a/frontend/src/components/birth-time-candidate-result.tsx b/frontend/src/components/birth-time-candidate-result.tsx
index 0b3471dd..61a94a23 100644
--- a/frontend/src/components/birth-time-candidate-result.tsx
+++ b/frontend/src/components/birth-time-candidate-result.tsx
@@ -7,6 +7,7 @@ import { guidedTerminalPath } from "@/lib/birth-time-guided-terminal";
 type CandidateResultProps = {
   readonly journey: JourneyClientResponse;
   readonly controller: BirthTimeGuidedController;
+  readonly error: string;
 };
 
 const confidenceLabels = {
@@ -15,7 +16,7 @@ const confidenceLabels = {
   high: "较高置信",
 } as const;
 
-export function BirthTimeCandidateResult({ journey, controller }: CandidateResultProps) {
+export function BirthTimeCandidateResult({ journey, controller, error }: CandidateResultProps) {
   const result = journey.candidateResult;
   const action = journey.nextAction;
   const dynamic = journey.journeyProtocol === "dynamic-choice-v2";
@@ -24,7 +25,8 @@ export function BirthTimeCandidateResult({ journey, controller }: CandidateResul
     return (
       <div className="birth-time-candidate-result" aria-live="polite">
         <p className="birth-time-evidence-boundary">系统不会选择或应用未经证据支持的具体分钟，<span className="phrase-nowrap">当前排盘使用时间</span>保持不变。</p>
-        {terminalPath && <TerminalAction controller={controller} path={terminalPath} />}
+        {terminalPath && <TerminalAction controller={controller} error={error} path={terminalPath} />}
+        {!terminalPath && error ? <p className="form-error" role="alert">{error}</p> : null}
       </div>
     );
   }
@@ -52,13 +54,13 @@ export function BirthTimeCandidateResult({ journey, controller }: CandidateResul
       {action.kind === "present_low_result" && (
         <div className="birth-time-candidate-terminal" role="status">
           <p>{dynamic ? "目前没有足够的新信息继续稳定缩小范围，本次评估已结束并保存当前候选范围。" : "本轮校正已安全结束，只保留候选范围，当前排盘使用时间保持不变。"}</p>
-          {terminalPath && <TerminalAction controller={controller} path={terminalPath} />}
+          {terminalPath && <TerminalAction controller={controller} error={error} path={terminalPath} />}
         </div>
       )}
       {action.kind === "present_medium_result" && winner && dynamic && (
         <div className="birth-time-candidate-terminal" role="status">
           <p>已形成较窄的候选范围，本次评估已结束；它不会自动改动<span className="phrase-nowrap">当前排盘使用时间</span>。</p>
-          {terminalPath && <TerminalAction controller={controller} path={terminalPath} />}
+          {terminalPath && <TerminalAction controller={controller} error={error} path={terminalPath} />}
         </div>
       )}
       {action.kind === "present_medium_result" && winner && !dynamic && (
@@ -72,7 +74,7 @@ export function BirthTimeCandidateResult({ journey, controller }: CandidateResul
       {action.kind === "candidate_saved" && (
         <div className="birth-time-candidate-terminal" role="status">
           <p className="birth-time-success-note">候选时间范围已保存。<span className="phrase-nowrap">当前排盘使用时间</span>没有改变。</p>
-          {terminalPath && <TerminalAction controller={controller} path={terminalPath} />}
+          {terminalPath && <TerminalAction controller={controller} error={error} path={terminalPath} />}
         </div>
       )}
       {action.kind === "request_candidate_confirmation" && winner && (
@@ -90,27 +92,32 @@ export function BirthTimeCandidateResult({ journey, controller }: CandidateResul
           <button className="button-primary birth-time-guided-action" disabled={controller.pending} type="button" onClick={controller.acknowledgeReady}>继续使用此排盘</button>
         </div>
       )}
+      {!terminalPath && error ? <p className="form-error" role="alert">{error}</p> : null}
     </div>
   );
 }
 
-function TerminalAction({ controller, path }: {
+function TerminalAction({ controller, error, path }: {
   readonly controller: BirthTimeGuidedController;
+  readonly error: string;
   readonly path: NonNullable<ReturnType<typeof guidedTerminalPath>>;
 }) {
   if (path.kind === "complete_with_candidate") {
     return (
-      <div className="birth-time-new-assessment">
+      <div className="birth-time-next-step">
+        <b>评估已完成，下一步</b>
+        <p>点击后将使用 {path.time} 作为当前排盘时间并进入对话；原始填报和本次候选结果仍会保留。</p>
         <button className="button-primary birth-time-guided-action" disabled={controller.pending} onClick={() => controller.completeCandidate(path.time)} type="button">
-          {controller.pending ? "保存中…" : "完成并继续对话"}
+          {controller.pending ? `正在采用 ${path.time}…` : `采用 ${path.time} 并进入对话`}
         </button>
-        <small>将以 {path.time} 作为当前工作排盘时间；候选状态和原始资料都会保留。</small>
+        {error ? <p className="form-error" role="alert">{error}</p> : null}
       </div>
     );
   }
   return (
     <div className="birth-time-new-assessment">
       <button className="button-secondary birth-time-guided-action" disabled={controller.pending} onClick={controller.editBirthTimeDetails} type="button">开始新的评估</button>
+      {error ? <p className="form-error" role="alert">{error}</p> : null}
       <small>会建立新的记录，当前结果仍会保留。</small>
     </div>
   );
diff --git a/frontend/src/components/birth-time-legacy-rectification.tsx b/frontend/src/components/birth-time-legacy-rectification.tsx
index e6e1d56d..5e3dc65b 100644
--- a/frontend/src/components/birth-time-legacy-rectification.tsx
+++ b/frontend/src/components/birth-time-legacy-rectification.tsx
@@ -76,8 +76,14 @@ export function BirthTimeLegacyRectification(props: LegacyRectificationProps) {
       {action.kind === "score_pending" && <p className="birth-time-scoring-status" role="status">正在使用已确认的关键经历评分…</p>}
       {action.kind === "retry_scoring" && <button className="button-primary birth-time-guided-action" disabled={props.controller.pending} onClick={props.controller.retryScoring} type="button">重新评分</button>}
       {action.kind === "paused" && <button className="button-primary birth-time-guided-action" disabled={props.controller.pending} onClick={props.controller.resume} type="button">继续校正</button>}
-      {showsCandidate && <BirthTimeCandidateResult controller={props.controller} journey={props.journey} />}
-      {error && <p className="form-error" role="alert">{error}</p>}
+      {showsCandidate ? (
+        <BirthTimeCandidateResult
+          controller={props.controller}
+          error={error}
+          journey={props.journey}
+        />
+      ) : null}
+      {error && !showsCandidate ? <p className="form-error" role="alert">{error}</p> : null}
     </section>
   );
 }
diff --git a/frontend/src/components/birth-time-rectification.tsx b/frontend/src/components/birth-time-rectification.tsx
index a59e8206..c7a07940 100644
--- a/frontend/src/components/birth-time-rectification.tsx
+++ b/frontend/src/components/birth-time-rectification.tsx
@@ -115,8 +115,14 @@ export function BirthTimeRectification(props: BirthTimeRectificationProps) {
       )}
       {action.kind === "retry_scoring" && <button className="button-primary birth-time-guided-action" disabled={props.controller.pending} onClick={props.controller.retryScoring} type="button">重新评分</button>}
       {action.kind === "paused" && <button className="button-primary birth-time-guided-action" disabled={props.controller.pending} onClick={props.controller.resume} type="button">继续本次评估</button>}
-      {showsCandidate && <BirthTimeCandidateResult controller={props.controller} journey={props.journey} />}
-      {error && action.kind !== "ask_dynamic_choice" && action.kind !== "clarify_unmatched_answer" && <p className="form-error" role="alert">{error}</p>}
+      {showsCandidate ? (
+        <BirthTimeCandidateResult
+          controller={props.controller}
+          error={error}
+          journey={props.journey}
+        />
+      ) : null}
+      {error && !showsCandidate ? <p className="form-error" role="alert">{error}</p> : null}
     </section>
   );
 }
diff --git a/frontend/tests/birth-time-guided-review-fixes.test.ts b/frontend/tests/birth-time-guided-review-fixes.test.ts
index f96acedc..f7d23106 100644
--- a/frontend/tests/birth-time-guided-review-fixes.test.ts
+++ b/frontend/tests/birth-time-guided-review-fixes.test.ts
@@ -119,6 +119,23 @@ test("ready completion is explicit and terminal low has no finish mutation", ()
   assert.doesNotMatch(candidateSource, /controller\.finish/);
 });
 
+test("terminal candidate owns one explicit next step and its completion error", () => {
+  const candidateResultSource = readFileSync(new URL("../src/components/birth-time-candidate-result.tsx", import.meta.url), "utf8");
+  const rectificationSource = readFileSync(new URL("../src/components/birth-time-rectification.tsx", import.meta.url), "utf8");
+  const legacyRectificationSource = readFileSync(new URL("../src/components/birth-time-legacy-rectification.tsx", import.meta.url), "utf8");
+  const globalCssSource = readFileSync(new URL("../src/app/globals.css", import.meta.url), "utf8");
+
+  assert.match(candidateResultSource, /评估已完成，下一步/);
+  assert.match(candidateResultSource, /采用 \$\{path\.time\} 并进入对话/);
+  assert.match(candidateResultSource, /正在采用 \$\{path\.time\}…/);
+  assert.match(candidateResultSource, /birth-time-next-step/);
+  assert.match(rectificationSource, /error=\{error\}/);
+  assert.match(rectificationSource, /error && !showsCandidate/);
+  assert.match(legacyRectificationSource, /error=\{error\}/);
+  assert.match(legacyRectificationSource, /error && !showsCandidate/);
+  assert.match(globalCssSource, /\.birth-time-next-step/);
+});
+
 test("completed rectification transcript does not repeat the birth place turn", () => {
   const pageSource = readFileSync(new URL("../src/app/page.tsx", import.meta.url), "utf8");