fix:

1. 修复登录界面文字被遮挡问题 2. 大字模式关闭后显示异常问题 3. 重新调整大字模式是否开启时的字体显示效果
2026-04-10 20:35:57 +08:00
parent abf8497c2e
commit 17b9fa3466
27 changed files with 390 additions and 161 deletions
--- a/api/app/agents/chat/interview_turn_plan.py
+++ b/api/app/agents/chat/interview_turn_plan.py
@@ -88,7 +88,11 @@ def _is_emotion_heavy(text: str) -> bool:
        return False
    if any(m in t for m in _EMOTION_MARKERS):
        return True
-    if len(t) >= 40 and ("！" in t or "!" in t) and (".." in t or "…" in t or "唉" in t):
+    if (
+        len(t) >= 40
+        and ("！" in t or "!" in t)
+        and (".." in t or "…" in t or "唉" in t)
+    ):
        return True
    return False

--- a/api/app/agents/chat/prompts_conversation.py
+++ b/api/app/agents/chat/prompts_conversation.py
@@ -366,7 +366,11 @@ def get_guided_conversation_prompt(
        current_stage, empty_slots
    )

-    _prefix = f"{turn_directive_block.rstrip()}\n\n" if (turn_directive_block or "").strip() else ""
+    _prefix = (
+        f"{turn_directive_block.rstrip()}\n\n"
+        if (turn_directive_block or "").strip()
+        else ""
+    )

    return f"""{_prefix}你是「岁月知己」——**主持式知己**：语气像最懂我的老朋友，**职责是帮用户把人生故事口述清楚**。{tone_line}

--- a/api/app/agents/memoir/batch_phase1_prep.py
+++ b/api/app/agents/memoir/batch_phase1_prep.py
@@ -124,12 +124,8 @@ def _run_batch_phase1_prep_chunk_with_bisect(
        mid = len(segments) // 2
        if mid < 1:
            raise
-        left = _run_batch_phase1_prep_chunk_with_bisect(
-            segments[:mid], state, llm
-        )
-        right = _run_batch_phase1_prep_chunk_with_bisect(
-            segments[mid:], state, llm
-        )
+        left = _run_batch_phase1_prep_chunk_with_bisect(segments[:mid], state, llm)
+        right = _run_batch_phase1_prep_chunk_with_bisect(segments[mid:], state, llm)
        merged = {**left, **right}
        expected = {str(s.id) for s in segments}
        if merged.keys() != expected:
@@ -181,7 +177,5 @@ def run_batch_phase1_prep_chunked(
            missing,
            extra,
        )
-        raise ValueError(
-            "batch phase1 chunked: merged segment ids do not match input"
-        )
+        raise ValueError("batch phase1 chunked: merged segment ids do not match input")
    return merged
--- a/api/app/core/memoir_pipeline_progress.py
+++ b/api/app/core/memoir_pipeline_progress.py
@@ -83,7 +83,9 @@ def _merge_phase2_list(
    return list(by_tid.values())


-def _fanout_list_merge_key(items: list[dict], patch_items: list[dict], id_key: str) -> None:
+def _fanout_list_merge_key(
+    items: list[dict], patch_items: list[dict], id_key: str
+) -> None:
    by_id: dict[str, dict[str, Any]] = {}
    for x in items:
        k = str(x.get(id_key) or "").strip()
@@ -104,9 +106,11 @@ def _fanout_list_merge_key(items: list[dict], patch_items: list[dict], id_key: s
 def _merge_fanout(base: dict[str, Any], patch: dict[str, Any]) -> dict[str, Any]:
    out = dict(base)
    for k, v in patch.items():
-        if k in ("story_images", "recompose_chapters", "memory_enrichment") and isinstance(
-            v, list
-        ):
+        if k in (
+            "story_images",
+            "recompose_chapters",
+            "memory_enrichment",
+        ) and isinstance(v, list):
            id_key = (
                "story_id"
                if k == "story_images"
@@ -132,14 +136,14 @@ def _merge_doc(base: dict[str, Any], patch: dict[str, Any]) -> dict[str, Any]:
        if k == "phase2" and isinstance(v, list):
            out["phase2"] = _merge_phase2_list(list(out.get("phase2") or []), v)
        elif k == "fanout" and isinstance(v, dict):
-            out["fanout"] = _merge_fanout(
-                dict(out.get("fanout") or _empty_fanout()), v
-            )
+            out["fanout"] = _merge_fanout(dict(out.get("fanout") or _empty_fanout()), v)
        elif k == "phase1" and isinstance(v, dict):
            cur = dict(out.get("phase1") or {})
            for pk, pv in v.items():
-                if pk == "detail" and isinstance(pv, dict) and isinstance(
-                    cur.get("detail"), dict
+                if (
+                    pk == "detail"
+                    and isinstance(pv, dict)
+                    and isinstance(cur.get("detail"), dict)
                ):
                    cur["detail"] = {**cur["detail"], **pv}
                else:
--- a/api/app/features/evaluation/judge_manual_service.py
+++ b/api/app/features/evaluation/judge_manual_service.py
@@ -712,7 +712,9 @@ class EvalJudgeManualService:

        def _nonempty_chapters(cols: list[Any]) -> int:
            return sum(
-                1 for x in cols if (getattr(x, "canonical_markdown", None) or "").strip()
+                1
+                for x in cols
+                if (getattr(x, "canonical_markdown", None) or "").strip()
            )

        conc = max(1, min(32, int(settings.eval_judge_memoir_chapter_concurrency)))
@@ -849,9 +851,7 @@ class EvalJudgeManualService:
        judged = await asyncio.gather(*[_judge_one(p) for p in prepared])
        judged.sort(
            key=lambda r: (
-                r["order_index"]
-                if r["order_index"] is not None
-                else 10**9,
+                r["order_index"] if r["order_index"] is not None else 10**9,
                r["enum_idx"],
            )
        )
@@ -900,7 +900,11 @@ class EvalJudgeManualService:
        """Streaming SSE: one event per chapter judge result, concurrent LLM calls."""
        uid = (user_id or "").strip()
        if not uid:
-            yield {"event": "error", "phase": "validate", "message": "user_id is required"}
+            yield {
+                "event": "error",
+                "phase": "validate",
+                "message": "user_id is required",
+            }
            return

        judge, resolved_model = _make_eval_judge(judge_provider, judge_model)
@@ -912,7 +916,10 @@ class EvalJudgeManualService:
        trace_svc = EvalTraceService(self._db)

        def _chapter_evidence_notes(
-            lineage_tier: str, evidence_summary: str, truncated: bool, dropped: list[str]
+            lineage_tier: str,
+            evidence_summary: str,
+            truncated: bool,
+            dropped: list[str],
        ) -> str:
            drops = ",".join(dropped[:12]) if dropped else ""
            return (
@@ -926,8 +933,14 @@ class EvalJudgeManualService:
                uid, self._db, active_only=True, is_new_only=None
            )
        except Exception as e:
-            logger.exception("manual memoir stream: chapter list failed user_id={}", uid)
-            yield {"event": "error", "phase": "load", "message": f"加载章节列表失败：{e}"}
+            logger.exception(
+                "manual memoir stream: chapter list failed user_id={}", uid
+            )
+            yield {
+                "event": "error",
+                "phase": "load",
+                "message": f"加载章节列表失败：{e}",
+            }
            return

        yield {
@@ -957,15 +970,22 @@ class EvalJudgeManualService:
                cb = await trace_svc.build_chapter_bundle(uid, ch)
                formatted, cb2 = await trace_svc.format_chapter_bundle(cb)
                fm = formatted.format_meta
-                prepared.append({
-                    "ch": ch, "bl": bl, "md": md,
+                prepared.append(
+                    {
+                        "ch": ch,
+                        "bl": bl,
+                        "md": md,
                        "baseline_excerpt": baseline_excerpt,
-                    "formatted": formatted, "cb2": cb2, "fm": fm,
-                })
+                        "formatted": formatted,
+                        "cb2": cb2,
+                        "fm": fm,
+                    }
+                )
            except Exception as e:
                logger.exception(
                    "manual memoir stream: chapter prepare failed user_id={} chapter_id={}",
-                    uid, ch.id,
+                    uid,
+                    ch.id,
                )
                yield {
                    "event": "chapter_error",
@@ -1025,7 +1045,8 @@ class EvalJudgeManualService:
                    except Exception as exc:
                        logger.warning(
                            "memoir stream: baseline judge failed ch={} err={}",
-                            ch.id, exc,
+                            ch.id,
+                            exc,
                        )
                        baseline_error = str(exc)

@@ -1040,14 +1061,17 @@ class EvalJudgeManualService:
                except Exception as e:
                    logger.exception(
                        "manual memoir stream: chapter judge failed user_id={} chapter_id={}",
-                        uid, ch.id,
+                        uid,
+                        ch.id,
                    )
-                    await result_queue.put({
+                    await result_queue.put(
+                        {
                            "event": "chapter_error",
                            "chapter_id": ch.id,
                            "title": ch.title,
                            "message": f"评审失败：{e}",
-                    })
+                        }
+                    )
                    return
                cj = cj_res.output
                compare_summary = build_memoir_compare_summary(
@@ -1073,12 +1097,14 @@ class EvalJudgeManualService:
                    row["judge_error"] = cj_res.error
                if not cj and not cj_res.error:
                    row["judge_error"] = "empty_output"
-                await result_queue.put({
+                await result_queue.put(
+                    {
                        "event": "chapter_judge",
                        "index": idx,
                        "chapter": row,
                        "ok": cj is not None,
-                })
+                    }
+                )

        tasks = [asyncio.create_task(_judge_one(i, p)) for i, p in enumerate(prepared)]

--- a/api/app/features/evaluation/judge_schemas.py
+++ b/api/app/features/evaluation/judge_schemas.py
@@ -229,8 +229,12 @@ class MemoirJudgeOutput(BaseModel):

    # 细项：校验放宽到 0–100；真实满分仍以 rubric 为准，由 after 钳制
    mem_fidelity: float = Field(default=0, ge=0, le=100, description="记忆忠实度")
-    mem_factual_accuracy: float = Field(default=0, ge=0, le=100, description="事实准确性")
-    mem_factual_coverage: float = Field(default=0, ge=0, le=100, description="事实覆盖率")
+    mem_factual_accuracy: float = Field(
+        default=0, ge=0, le=100, description="事实准确性"
+    )
+    mem_factual_coverage: float = Field(
+        default=0, ge=0, le=100, description="事实覆盖率"
+    )
    mem_traceability: float = Field(default=0, ge=0, le=100, description="记忆可追溯性")

    info_slot_coverage: float = Field(default=0, ge=0, le=100, description="槽位覆盖度")
@@ -290,7 +294,9 @@ class MemoirJudgeOutput(BaseModel):
    def _coerce_memoir_judge_input(cls, data: Any) -> Any:
        if not isinstance(data, dict):
            return data
-        data["rationale"] = "" if data.get("rationale") is None else str(data["rationale"])
+        data["rationale"] = (
+            "" if data.get("rationale") is None else str(data["rationale"])
+        )
        for key in ("major_strengths", "major_issues", "insufficient_evidence"):
            data[key] = _coerce_judge_str_list(data.get(key))
        raw_refs = data.get("evidence_refs")
--- a/api/app/features/evaluation/judge_service.py
+++ b/api/app/features/evaluation/judge_service.py
@@ -492,7 +492,9 @@ class EvalJudgeService:
                self._llm,
                prompt,
                MemoirJudgeOutput,
-                max_tokens=max(512, int(settings.eval_judge_memoir_completion_max_tokens)),
+                max_tokens=max(
+                    512, int(settings.eval_judge_memoir_completion_max_tokens)
+                ),
                agent="EvalJudgeService.judge_memoir",
            )
            return JudgeCallResult(output=out)
--- a/api/app/features/evaluation/memoir_compare_summary.py
+++ b/api/app/features/evaluation/memoir_compare_summary.py
@@ -106,9 +106,7 @@ def build_memoir_compare_summary(
    key_regressions = [
        v["label"] for v in leaf_deltas.values() if float(v["delta"]) <= -0.5
    ]
-    key_gains = [
-        v["label"] for v in leaf_deltas.values() if float(v["delta"]) >= 0.5
-    ]
+    key_gains = [v["label"] for v in leaf_deltas.values() if float(v["delta"]) >= 0.5]

    parity_passed = total_delta >= -2.0 and len(key_regressions) <= 3
    surpass_passed = total_delta >= 2.0 and len(key_regressions) <= 1
--- a/api/app/features/memory/service.py
+++ b/api/app/features/memory/service.py
@@ -363,9 +363,7 @@ def ingest_transcripts_batch_sync(
        if not text:
            continue
        primary_mid = (
-            primary_user_message_id_from_lineage(lineage_json)
-            if lineage_json
-            else None
+            primary_user_message_id_from_lineage(lineage_json) if lineage_json else None
        )
        source = create_source_sync(
            session,
@@ -419,9 +417,7 @@ def ingest_transcripts_batch_sync(
        )

    emb_ok = (
-        embedding_provider.is_available()
-        if embedding_provider is not None
-        else False
+        embedding_provider.is_available() if embedding_provider is not None else False
    )
    logger.info(
        "event=memory_ingest_batch_done user_id={} sources={} chunks={} "
--- a/api/app/tasks/celery_app.py
+++ b/api/app/tasks/celery_app.py
@@ -128,7 +128,9 @@ def _log_task_prerun(


@task_success.connect
-def _log_task_success(sender: object | None = None, result: object | None = None, **_: object) -> None:
+def _log_task_success(
+    sender: object | None = None, result: object | None = None, **_: object
+) -> None:
    """仅成功路径；失败见 ``task_failure``（避免 ``task_postrun`` 在异常态仍触发）。"""
    name = getattr(sender, "name", None) if sender is not None else None
    name = name or "?"
--- a/api/app/tasks/memoir_tasks.py
+++ b/api/app/tasks/memoir_tasks.py
@@ -185,7 +185,9 @@ def _update_task_status_sync(

        logger.debug("任务状态已更新: task_id={} status={}", task_id, status)
    except Exception as e:
-        logger.error("event=memoir_task_status_update_failed msg=更新任务状态失败 exc={}", e)
+        logger.error(
+            "event=memoir_task_status_update_failed msg=更新任务状态失败 exc={}", e
+        )


 def _merge_chapter_image_assets(
--- a/api/app/tasks/story_image_tasks.py
+++ b/api/app/tasks/story_image_tasks.py
@@ -151,9 +151,7 @@ def _claim_story_image_intent_sync(db, story_id: str, claim_token: str):


@shared_task(bind=True, max_retries=3, default_retry_delay=30)
-def generate_story_image(
-    self, story_id: str, memoir_correlation_id: str | None = None
-):
+def generate_story_image(self, story_id: str, memoir_correlation_id: str | None = None):
    """
    为 story 生成主插图。
    从 story_image_intents 原子认领 primary intent，生成后写入 assets 并更新 intent。
--- a/api/tests/test_batch_phase1_chunked.py
+++ b/api/tests/test_batch_phase1_chunked.py
@@ -47,9 +47,7 @@ def test_run_batch_phase1_prep_chunked_splits_95_into_four_calls(
        "app.agents.memoir.batch_phase1_prep.run_batch_phase1_prep",
        fake_prep,
    )
-    segments = [
-        SimpleNamespace(id=f"s{i}", user_input_text="hello") for i in range(95)
-    ]
+    segments = [SimpleNamespace(id=f"s{i}", user_input_text="hello") for i in range(95)]
    by_id = run_batch_phase1_prep_chunked(
        segments,
        _state(),
@@ -85,9 +83,7 @@ def test_chunked_bisect_on_value_error(monkeypatch: pytest.MonkeyPatch) -> None:
        "app.agents.memoir.batch_phase1_prep.run_batch_phase1_prep",
        fake_prep,
    )
-    segments = [
-        SimpleNamespace(id=f"b{i}", user_input_text="x") for i in range(4)
-    ]
+    segments = [SimpleNamespace(id=f"b{i}", user_input_text="x") for i in range(4)]
    by_id = run_batch_phase1_prep_chunked(
        segments,
        _state(),
--- a/api/tests/test_memoir_pipeline_progress.py
+++ b/api/tests/test_memoir_pipeline_progress.py
@@ -83,23 +83,15 @@ def test_merge_fanout_lists_merge_by_id(fake_redis: _FakeRedis) -> None:


 def test_init_and_index_resolve(fake_redis: _FakeRedis) -> None:
-    mpp.init_pipeline_run_from_phase1(
-        "user-a", "cid-4", "p1tid", segment_count=3
-    )
+    mpp.init_pipeline_run_from_phase1("user-a", "cid-4", "p1tid", segment_count=3)
    cid = mpp.resolve_correlation_id_for_phase1_task("p1tid")
    assert cid == "cid-4"
-    snap = mpp.get_pipeline_run_for_eval(
-        "user-a", phase1_task_id="p1tid"
-    )
+    snap = mpp.get_pipeline_run_for_eval("user-a", phase1_task_id="p1tid")
    assert snap is not None
    assert snap["user_id"] == "user-a"
    assert snap["phase1"]["task_id"] == "p1tid"


 def test_get_pipeline_run_for_eval_user_mismatch(fake_redis: _FakeRedis) -> None:
-    mpp.init_pipeline_run_from_phase1(
-        "user-a", "cid-5", "p1b", segment_count=1
-    )
-    assert (
-        mpp.get_pipeline_run_for_eval("other", phase1_task_id="p1b") is None
-    )
+    mpp.init_pipeline_run_from_phase1("user-a", "cid-5", "p1b", segment_count=1)
+    assert mpp.get_pipeline_run_for_eval("other", phase1_task_id="p1b") is None
--- a/api/tests/test_memory_enrichment_baseline.py
+++ b/api/tests/test_memory_enrichment_baseline.py
@@ -26,7 +26,9 @@ def test_enrichment_payload_roundtrip() -> None:
    assert p.facts[0].subject == "王伟"


-def test_enrich_memory_after_ingest_sync_single_llm_call(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_enrich_memory_after_ingest_sync_single_llm_call(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
    from app.features.memory import enrichment as mod

    monkeypatch.setattr("app.core.config.settings.memory_enrichment_enabled", True)
@@ -81,7 +83,9 @@ def test_enrich_memory_after_ingest_sync_single_llm_call(monkeypatch: pytest.Mon
    assert facts[0]["status"] == "confirmed"


-def test_enrich_memory_skips_when_parse_returns_none(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_enrich_memory_skips_when_parse_returns_none(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
    from app.features.memory import enrichment as mod

    monkeypatch.setattr("app.core.config.settings.memory_enrichment_enabled", True)
--- a/api/tests/test_memory_evidence.py
+++ b/api/tests/test_memory_evidence.py
@@ -46,7 +46,9 @@ def test_retrieve_evidence_bundle_sync_uses_vector_search(
        }

    monkeypatch.setattr(evidence_mod, "search_chunks_vector_sync", fake_search)
-    monkeypatch.setattr(evidence_mod, "fetch_evidence_metadata_parallel_sync", fake_meta)
+    monkeypatch.setattr(
+        evidence_mod, "fetch_evidence_metadata_parallel_sync", fake_meta
+    )

    out = retrieve_evidence_bundle_sync(
        session=object(),
--- a/app-expo/design-tokens.json
+++ b/app-expo/design-tokens.json
@@ -200,6 +200,26 @@
      "lineHeightTight": 24,
      "lineHeightLoose": 29,
      "lineHeightXLoose": 34
+    },
+    "xlarge": {
+      "headingLarge": 44,
+      "headingMedium": 33,
+      "headingSmall": 28,
+      "titleLarge": 28,
+      "titleMedium": 25,
+      "titleSmall": 21,
+      "bodyLarge": 28,
+      "bodyMedium": 26,
+      "bodySmall": 18,
+      "captionLarge": 18,
+      "captionMedium": 16,
+      "captionSmall": 15,
+      "sectionTitle": 16,
+      "badge": 13,
+      "lineHeightNormal": 30,
+      "lineHeightTight": 28,
+      "lineHeightLoose": 34,
+      "lineHeightXLoose": 40
    }
  }
 }
--- a/app-expo/src/app/(main)/conversation/[id].tsx
+++ b/app-expo/src/app/(main)/conversation/[id].tsx
@@ -960,13 +960,14 @@ export default function ConversationScreen() {
  /** 大字模式：朗读图标与触控区与气泡字号同档放大 */
  const chatReadAloudIconSize = largeText ? 24 : 20;
  const chatReadAloudButtonSize = largeText ? 52 : 44;
-  const chatVoiceDurationStyle = useMemo(
-    () => ({
-      fontSize: largeText ? typography.headingSmall : typography.titleMedium,
+  const chatVoiceDurationStyle = useMemo(() => {
+    const fs = largeText ? typography.headingSmall : typography.titleMedium;
+    return {
+      fontSize: fs,
+      lineHeight: Math.ceil(fs * 1.25),
      fontWeight: '500' as const,
-    }),
-    [typography, largeText],
-  );
+    };
+  }, [typography, largeText]);
  const chatTypingLabelStyle = useMemo(
    () => ({
      fontSize: largeText ? typography.bodySmall : typography.captionLarge,
@@ -977,6 +978,9 @@ export default function ConversationScreen() {
  const headerTitleFontStyle = useMemo(
    () => ({
      fontSize: largeText ? typography.headingMedium : typography.headingSmall,
+      lineHeight: largeText
+        ? Math.ceil(typography.headingMedium * 1.4)
+        : Math.ceil(typography.headingSmall * 1.28),
    }),
    [typography, largeText],
  );
@@ -992,13 +996,14 @@ export default function ConversationScreen() {
    }),
    [typography, inputLineHeight, largeText],
  );
-  const connectionNoticeTitleStyle = useMemo(
-    () => ({
-      fontSize: largeText ? typography.titleSmall : typography.captionLarge,
+  const connectionNoticeTitleStyle = useMemo(() => {
+    const fs = largeText ? typography.titleSmall : typography.captionLarge;
+    return {
+      fontSize: fs,
+      lineHeight: Math.ceil(fs * 1.28),
      fontWeight: '700' as const,
-    }),
-    [typography, largeText],
-  );
+    };
+  }, [typography, largeText]);
  const connectionNoticeBodyStyle = useMemo(
    () => ({
      fontSize: largeText ? typography.bodySmall : typography.captionLarge,
@@ -1401,7 +1406,10 @@ export default function ConversationScreen() {
        variant="chat"
        title={
          <View style={styles.headerTitleBlock}>
-            <Text style={[styles.headerTitle, headerTitleFontStyle]}>
+            <Text
+              style={[styles.headerTitle, headerTitleFontStyle]}
+              includeFontPadding={Platform.OS === 'android' ? false : undefined}
+            >
              {tApp('name')}
            </Text>
            {showConnectionBadge ? (
@@ -1757,6 +1765,7 @@ const styles = StyleSheet.create({
  },
  voiceDurationText: {
    fontSize: 18,
+    lineHeight: 24,
    fontWeight: '500',
  },
  voiceDurationTextUser: {
@@ -1879,15 +1888,13 @@ const styles = StyleSheet.create({
  },
  voiceRecordDurationWrap: {
    minWidth: 40,
-    height: 20,
+    minHeight: 20,
    alignItems: 'center',
    justifyContent: 'center',
+    paddingVertical: 1,
  },
+  /** 字号/行高由 voiceRecordDurationStyle 提供，避免大字模式仍锁 20px 高裁切 */
  voiceRecordDuration: {
-    fontSize: 12,
-    /** 与容器等高，避免 Android/iOS 数字相对胶囊上下偏移 */
-    height: 20,
-    lineHeight: 20,
    paddingVertical: 0,
    marginVertical: 0,
    color: 'rgba(27, 27, 31, 0.86)',
@@ -1905,7 +1912,7 @@ const styles = StyleSheet.create({
    width: '100%',
  },
  sendButton: {
-    height: 44,
+    minHeight: 44,
    paddingHorizontal: 16,
    paddingVertical: 11,
    borderRadius: 22,
--- a/app-expo/src/app/(tabs)/_layout.tsx
+++ b/app-expo/src/app/(tabs)/_layout.tsx
@@ -6,6 +6,7 @@ import { useColorScheme } from '@/hooks/use-color-scheme';
 import { useTranslation } from 'react-i18next';

 import { TabBarIcon } from '@/components/tab-bar-icon';
+import { useTypography } from '@/core/typography-context';
 import { useSession } from '@/features/auth/hooks';

 // Life-Echo bottom nav colors (from HTML reference)
@@ -27,6 +28,7 @@ const TAB_BAR_PADDING_HORIZONTAL = 12;

 export default function TabsLayout() {
  const { status } = useSession();
+  const typography = useTypography();
  const { colorScheme } = useColorScheme();
  const insets = useSafeAreaInsets();
  const isDark = colorScheme === 'dark';
@@ -75,7 +77,8 @@ export default function TabsLayout() {
          marginBottom: 0,
        },
        tabBarLabelStyle: {
-          fontSize: 11,
+          fontSize: typography.captionLarge,
+          lineHeight: typography.lineHeightTight,
          fontWeight: '600',
          textTransform: 'uppercase',
          marginTop: 4,
--- a/app-expo/src/app/(tabs)/index.tsx
+++ b/app-expo/src/app/(tabs)/index.tsx
@@ -154,14 +154,16 @@ function ConversationCard({
            {item.title}
          </Text>
          <Text
-            className="shrink-0 text-sm font-semibold uppercase tracking-wider text-muted-foreground"
+            variant="captionMedium"
+            className="shrink-0 font-semibold uppercase tracking-wider text-muted-foreground"
            style={{ fontVariant: ['tabular-nums'] }}
          >
            {formatRelativeConversationListTime(item.latestMessageTime, t)}
          </Text>
        </View>
        <Text
-          className="min-w-0 self-stretch text-base font-semibold text-muted-foreground"
+          variant="bodyMedium"
+          className="min-w-0 self-stretch font-semibold text-muted-foreground"
          numberOfLines={1}
          ellipsizeMode="tail"
        >
@@ -202,7 +204,8 @@ function SwipeableConversationCard({
    >
      <Icon as={Trash2} className="text-destructive-foreground" size={24} />
      <Text
-        className="mt-1 text-xs font-semibold text-destructive-foreground"
+        variant="captionSmall"
+        className="mt-1 font-semibold text-destructive-foreground"
        selectable={false}
      >
        {t('delete')}
@@ -405,11 +408,13 @@ export default function ConversationsScreen() {
                <Text
                  variant="h2"
                  className="text-center font-display text-primary"
-                  style={{ borderWidth: 0, fontSize: 28, lineHeight: 38 }}
                >
                  {t('greetingTitle')}
                </Text>
-                <Text className="text-center text-base font-medium leading-6 text-muted-foreground">
+                <Text
+                  variant="bodyLarge"
+                  className="text-center font-medium text-muted-foreground"
+                >
                  {t('emptyGreetingSubtitle')}
                </Text>
              </View>
@@ -429,13 +434,15 @@ export default function ConversationsScreen() {
                  <Text
                    variant="h2"
                    className="text-center font-display text-primary"
-                    style={{ borderWidth: 0, fontSize: 28, lineHeight: 38 }}
                  >
                    {showResumeEntry
                      ? t('resumeChatTitle')
                      : t('greetingTitle')}
                  </Text>
-                  <Text className="text-center text-base font-medium leading-6 text-muted-foreground">
+                  <Text
+                    variant="bodyLarge"
+                    className="text-center font-medium text-muted-foreground"
+                  >
                    {showResumeEntry
                      ? t('resumeChatSubtitle')
                      : t('emptyGreetingSubtitle')}
@@ -449,10 +456,14 @@ export default function ConversationsScreen() {
                    {t('recentChats')}
                  </Text>
                  <Pressable
-                    className="min-h-11 min-w-11 items-center justify-center active:opacity-70"
+                    className="min-h-11 items-center justify-center px-2 active:opacity-70"
+                    hitSlop={{ top: 6, bottom: 6, left: 4, right: 4 }}
                    onPress={() => {}}
                  >
-                    <Text className="text-sm font-semibold text-primary">
+                    <Text
+                      variant="bodySmall"
+                      className="font-semibold text-primary"
+                    >
                      {t('viewAll')}
                    </Text>
                  </Pressable>
--- a/app-expo/src/app/(tabs)/memoir.tsx
+++ b/app-expo/src/app/(tabs)/memoir.tsx
@@ -23,6 +23,7 @@ import { Icon } from '@/components/ui/icon';
 import { Skeleton } from '@/components/ui/skeleton';
 import { Text } from '@/components/ui/text';
 import { ScreenGutter } from '@/constants/layout';
+import { useTypography } from '@/core/typography-context';
 import { useCreateConversation } from '@/features/conversation/hooks';
 import {
  buildFrameworkChapterPlaceholders,
@@ -77,9 +78,18 @@ function ChapterCard({
  onReadPress: () => void;
  onContinuePress: () => void;
 }) {
+  const typography = useTypography();
  const { width } = useWindowDimensions();
  const contentWidth = Math.min(width - ScreenGutter * 2, 672);
  const gutter = ScreenGutter;
+  const completedTitleLineHeight = Math.max(
+    typography.lineHeightTight + 6,
+    typography.headingMedium + 6,
+  );
+  const draftingTitleLineHeight = Math.max(
+    typography.lineHeightTight + 4,
+    typography.titleLarge + 4,
+  );

  const chapterIndex = item.orderIndex + 1;
  const chapterLabel = t('chapterLabel').replace(
@@ -142,7 +152,8 @@ function ChapterCard({
        <View style={{ padding: gutter, gap: 12 }}>
          <View style={{ gap: 4, minHeight: 72 }}>
            <Text
-              className="text-xs font-medium text-muted-foreground"
+              variant="captionMedium"
+              className="font-medium text-muted-foreground"
              selectable
            >
              {chapterLabel}
@@ -150,7 +161,7 @@ function ChapterCard({
            <Text
              variant="h2"
              className="text-foreground"
-              style={{ lineHeight: 34 }}
+              style={{ lineHeight: completedTitleLineHeight }}
              numberOfLines={2}
              selectable
            >
@@ -161,7 +172,8 @@ function ChapterCard({
            <View className="flex-row items-center gap-2">
              <Icon as={FileText} className="text-muted-foreground" size={16} />
              <Text
-                className="text-sm font-medium text-muted-foreground"
+                variant="bodySmall"
+                className="font-medium text-muted-foreground"
                style={{ fontVariant: ['tabular-nums'] }}
                selectable
              >
@@ -174,7 +186,10 @@ function ChapterCard({
            style={{ borderCurve: 'continuous' }}
            onPress={onReadPress}
          >
-            <Text className="text-base font-semibold text-primary-foreground">
+            <Text
+              variant="bodyLarge"
+              className="font-semibold text-primary-foreground"
+            >
              {t('readMemory')}
            </Text>
          </Pressable>
@@ -197,7 +212,8 @@ function ChapterCard({
        <View className="gap-1">
          <View>
            <Text
-              className="text-xs font-medium text-muted-foreground"
+              variant="captionMedium"
+              className="font-medium text-muted-foreground"
              selectable
            >
              {chapterLabel}
@@ -205,7 +221,7 @@ function ChapterCard({
            <Text
              variant="h4"
              className="mt-0.5 text-foreground"
-              style={{ lineHeight: 28 }}
+              style={{ lineHeight: draftingTitleLineHeight }}
              numberOfLines={2}
              selectable
            >
@@ -213,7 +229,11 @@ function ChapterCard({
            </Text>
          </View>
          <View className="mt-2 flex-row items-center gap-2">
-            <Text className="text-sm font-medium text-secondary" selectable>
+            <Text
+              variant="bodySmall"
+              className="font-medium text-secondary"
+              selectable
+            >
              {t('statusDrafting')}
            </Text>
          </View>
@@ -223,7 +243,7 @@ function ChapterCard({
          style={{ borderCurve: 'continuous' }}
          onPress={onContinuePress}
        >
-          <Text className="text-base font-semibold text-secondary">
+          <Text variant="bodyLarge" className="font-semibold text-secondary">
            {t('continueWriting')}
          </Text>
        </Pressable>
@@ -237,7 +257,7 @@ function MemoirLoadError({ onRetry }: { onRetry: () => void }) {
  const { t } = useTranslation('memoir');
  return (
    <View className="items-center gap-4 rounded-2xl border border-dashed border-border bg-muted/20 p-10">
-      <Text className="text-center text-base text-destructive">
+      <Text variant="bodyLarge" className="text-center text-destructive">
        {t('loadErrorMessage')}
      </Text>
      <Pressable
@@ -245,7 +265,10 @@ function MemoirLoadError({ onRetry }: { onRetry: () => void }) {
        style={{ borderCurve: 'continuous' }}
        onPress={onRetry}
      >
-        <Text className="font-semibold text-primary-foreground">
+        <Text
+          variant="bodyMedium"
+          className="font-semibold text-primary-foreground"
+        >
          {t('loadErrorRetry')}
        </Text>
      </Pressable>
--- a/app-expo/src/app/(tabs)/profile.tsx
+++ b/app-expo/src/app/(tabs)/profile.tsx
@@ -90,11 +90,15 @@ function LanguageRow({
        <Icon as={Globe} className="text-muted-foreground" size={20} />
        <View>
          <Text className="font-medium text-foreground">{label}</Text>
-          <Text className="text-sm text-muted-foreground">{description}</Text>
+          <Text variant="bodySmall" className="text-muted-foreground">
+            {description}
+          </Text>
        </View>
      </View>
      <View className="flex-row items-center gap-2">
-        <Text className="text-sm text-muted-foreground">{currentLabel}</Text>
+        <Text variant="bodySmall" className="text-muted-foreground">
+          {currentLabel}
+        </Text>
        <Icon as={ChevronRight} className="text-muted-foreground" size={20} />
      </View>
    </Pressable>
@@ -120,7 +124,9 @@ function SettingRow({
        <Icon as={SettingIcon} className="text-muted-foreground" size={20} />
        <View>
          <Text className="font-medium text-foreground">{label}</Text>
-          <Text className="text-sm text-muted-foreground">{description}</Text>
+          <Text variant="bodySmall" className="text-muted-foreground">
+            {description}
+          </Text>
        </View>
      </View>
      <Switch checked={value} onCheckedChange={onValueChange} />
@@ -203,7 +209,7 @@ export default function ProfileScreen() {
          <Text variant="h3" className="text-foreground">
            {user?.nickname ?? t('userNamePlaceholder')}
          </Text>
-          <Text className="text-sm text-muted-foreground">
+          <Text variant="bodySmall" className="text-muted-foreground">
            {t('userTier', { tier: tierLabel })}
          </Text>
        </View>
--- a/app-expo/src/components/screen-header.tsx
+++ b/app-expo/src/components/screen-header.tsx
@@ -1,12 +1,20 @@
 import { router } from 'expo-router';
 import { ArrowLeft } from 'lucide-react-native';
 import React from 'react';
-import { Pressable, View } from 'react-native';
+import { Platform, Pressable, Text as RNText, View } from 'react-native';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';

 import { Icon } from '@/components/ui/icon';
-import { Text } from '@/components/ui/text';
+import { useTypography } from '@/core/typography-context';
 import { ScreenGutter } from '@/constants/layout';
+import { useAppSettings } from '@/hooks/use-app-settings';
+
+/** 默认最小触控目标 48dp；大字模式下与标题字号匹配，略向左扩展便于够到边缘 */
+const BACK_HIT_MIN = 48;
+const BACK_HIT_MIN_LARGE = 56;
+const BACK_ICON_SIZE = 24;
+const BACK_ICON_SIZE_LARGE = 30;
+const BACK_EXTRA_HIT_LEFT = 4;

 export type ScreenHeaderVariant = 'default' | 'chat' | 'reading';

@@ -64,21 +72,44 @@ export function ScreenHeader({
  useSafeArea = true,
 }: ScreenHeaderProps) {
  const insets = useSafeAreaInsets();
+  const { largeText } = useAppSettings();
+  const typography = useTypography();
  const colors = VARIANT_COLORS[variant];

+  const backTouchMin = largeText ? BACK_HIT_MIN_LARGE : BACK_HIT_MIN;
+  const backIconSize = largeText ? BACK_ICON_SIZE_LARGE : BACK_ICON_SIZE;
+
  const handleBack = onBack ?? (() => router.back());
  const bgColor = backgroundColor ?? colors.background;
  const titleColor = colors.title;
  const iconColor = colors.icon ?? colors.iconSecondary;

+  /**
+   * 不要用外层 minHeight「框死」整块栏：paddingTop 含安全区时会把内容区压扁。
+   * 标题行最小高度随当前排版 token 计算（关大字也要留够，避免裁字 / Android font padding）。
+   */
+  const barPaddingBottom = largeText ? 18 : 16;
+  const titleRowPaddingV = largeText ? 8 : 4;
+  const titleFontSize =
+    variant === 'chat'
+      ? largeText
+        ? typography.headingMedium
+        : typography.headingSmall
+      : Math.max(typography.titleLarge, typography.headingSmall);
+  const titleLineMin =
+    variant === 'chat'
+      ? Math.ceil(titleFontSize * (largeText ? 1.45 : 1.38)) +
+        (largeText ? 14 : 10)
+      : Math.ceil(titleFontSize * 1.32) + (largeText ? 10 : 8);
+  const titleRowMinHeight = Math.max(backTouchMin, titleLineMin);
+
  const containerStyle = {
    flexDirection: 'row' as const,
    alignItems: 'center' as const,
    justifyContent: 'space-between' as const,
    paddingHorizontal: Math.max(ScreenGutter, 16),
    paddingTop: useSafeArea ? Math.max(insets.top, 12) : 12,
-    paddingBottom: 16,
-    minHeight: 56,
+    paddingBottom: barPaddingBottom,
    ...(bgColor && { backgroundColor: bgColor }),
    ...(absolute && {
      position: 'absolute' as const,
@@ -105,41 +136,74 @@ export function ScreenHeader({
          gap: 12,
          flex: 1,
          minWidth: 0,
+          paddingVertical: titleRowPaddingV,
+          minHeight: titleRowMinHeight,
        }}
      >
        {showBack && (
          <Pressable
            onPress={handleBack}
+            hitSlop={
+              Platform.OS === 'android'
+                ? {
+                    top: largeText ? 10 : 6,
+                    bottom: largeText ? 10 : 6,
+                    right: 8,
+                    left: BACK_EXTRA_HIT_LEFT,
+                  }
+                : {
+                    top: largeText ? 8 : 4,
+                    bottom: largeText ? 8 : 4,
+                    left: 2,
+                    right: 4,
+                  }
+            }
+            android_ripple={
+              Platform.OS === 'android'
+                ? { borderless: true, radius: backTouchMin / 2 }
+                : undefined
+            }
            style={({ pressed }) => ({
-              padding: 8,
+              minWidth: backTouchMin,
+              minHeight: backTouchMin,
+              marginLeft: -BACK_EXTRA_HIT_LEFT,
+              alignItems: 'center',
+              justifyContent: 'center',
              borderRadius: 9999,
-              opacity: pressed ? 0.7 : 1,
+              opacity: Platform.OS === 'android' ? 1 : pressed ? 0.7 : 1,
            })}
            accessibilityRole="button"
            accessibilityLabel={backAccessibilityLabel}
          >
            {iconColor ? (
-              <Icon as={ArrowLeft} size={24} color={iconColor} />
+              <Icon as={ArrowLeft} size={backIconSize} color={iconColor} />
            ) : (
-              <Icon as={ArrowLeft} size={24} className="text-foreground" />
+              <Icon
+                as={ArrowLeft}
+                size={backIconSize}
+                className="text-foreground"
+              />
            )}
          </Pressable>
        )}
        {typeof title === 'string' ? (
-          <Text
+          <RNText
            numberOfLines={1}
            selectable
            style={{
              flex: 1,
-              fontSize: variant === 'chat' ? 24 : 18,
+              fontSize: variant === 'chat' ? titleFontSize : 18,
+              lineHeight:
+                variant === 'chat'
+                  ? Math.ceil(titleFontSize * 1.35)
+                  : Math.ceil(18 * 1.32),
              fontWeight: '700',
              letterSpacing: -0.5,
              ...(titleColor && { color: titleColor }),
            }}
-            className={!titleColor ? 'text-foreground' : undefined}
          >
            {title}
-          </Text>
+          </RNText>
        ) : (
          <View style={{ flex: 1, minWidth: 0 }}>{title}</View>
        )}
--- a/app-expo/src/components/ui/alert-dialog.tsx
+++ b/app-expo/src/components/ui/alert-dialog.tsx
@@ -1,6 +1,7 @@
 import { buttonTextVariants, buttonVariants } from '@/components/ui/button';
 import { NativeOnlyAnimatedView } from '@/components/ui/native-only-animated-view';
 import { TextClassContext } from '@/components/ui/text';
+import { useTypography } from '@/core/typography-context';
 import { cn } from '@/lib/utils';
 import * as AlertDialogPrimitive from '@rn-primitives/alert-dialog';
 import * as React from 'react';
@@ -97,11 +98,20 @@ function AlertDialogFooter({ className, ...props }: ViewProps) {

 function AlertDialogTitle({
  className,
+  style,
  ...props
 }: AlertDialogPrimitive.TitleProps & React.RefAttributes<AlertDialogPrimitive.TitleRef>) {
+  const typography = useTypography();
  return (
    <AlertDialogPrimitive.Title
-      className={cn('min-w-0 text-foreground text-lg font-semibold', className)}
+      className={cn('min-w-0 text-foreground font-semibold', className)}
+      style={[
+        {
+          fontSize: typography.titleLarge,
+          lineHeight: typography.lineHeightTight,
+        },
+        style,
+      ]}
      {...props}
    />
  );
@@ -113,15 +123,20 @@ function AlertDialogDescription({
  ...props
 }: AlertDialogPrimitive.DescriptionProps &
  React.RefAttributes<AlertDialogPrimitive.DescriptionRef>) {
+  const typography = useTypography();
  return (
    <AlertDialogPrimitive.Description
      className={cn(
        // shrink: RN 中 Text 在 flex 内需 flexShrink 才能按父宽换行
-        'w-full min-w-0 shrink text-muted-foreground text-sm',
+        'w-full min-w-0 shrink text-muted-foreground',
        className
      )}
      style={[
        Platform.OS === 'web' ? undefined : { flexShrink: 1 },
+        {
+          fontSize: typography.bodyMedium,
+          lineHeight: typography.lineHeightLoose,
+        },
        style,
      ]}
      {...props}
@@ -135,7 +150,15 @@ function AlertDialogAction({
 }: AlertDialogPrimitive.ActionProps & React.RefAttributes<AlertDialogPrimitive.ActionRef>) {
  return (
    <TextClassContext.Provider value={buttonTextVariants({ className })}>
-      <AlertDialogPrimitive.Action className={cn(buttonVariants(), className)} {...props} />
+      <AlertDialogPrimitive.Action
+        className={cn(
+          buttonVariants(),
+          // 大字模式下文与行高变大，固定 h-10 会裁切标签（如「知道了」）
+          'h-auto min-h-14 py-3.5',
+          className
+        )}
+        {...props}
+      />
    </TextClassContext.Provider>
  );
 }
@@ -147,7 +170,11 @@ function AlertDialogCancel({
  return (
    <TextClassContext.Provider value={buttonTextVariants({ className, variant: 'outline' })}>
      <AlertDialogPrimitive.Cancel
-        className={cn(buttonVariants({ variant: 'outline' }), className)}
+        className={cn(
+          buttonVariants({ variant: 'outline' }),
+          'h-auto min-h-14 py-3.5',
+          className
+        )}
        {...props}
      />
    </TextClassContext.Provider>
--- a/app-expo/src/components/ui/text.tsx
+++ b/app-expo/src/components/ui/text.tsx
@@ -3,7 +3,13 @@ import { cn } from '@/lib/utils';
 import * as Slot from '@rn-primitives/slot';
 import { cva, type VariantProps } from 'class-variance-authority';
 import * as React from 'react';
-import { Platform, Text as RNText, type Role } from 'react-native';
+import {
+  Platform,
+  StyleSheet,
+  Text as RNText,
+  type Role,
+  type TextStyle,
+} from 'react-native';

 /**
 * Maps Text variant to design-token keys for fontSize and lineHeight.
@@ -122,6 +128,22 @@ const ARIA_LEVEL: Partial<Record<TextVariant, string>> = {

 const TextClassContext = React.createContext<string | undefined>(undefined);

+/** Android 上 lineHeight < fontSize 会裁切字形（如标题配 lineHeightTight） */
+const MIN_LINE_HEIGHT_RATIO = 1.2;
+
+function ensureMinimumLineHeight(style: TextStyle): TextStyle {
+  const fs = style.fontSize;
+  const lh = style.lineHeight;
+  if (typeof fs !== 'number' || typeof lh !== 'number') {
+    return style;
+  }
+  const minLh = Math.ceil(fs * MIN_LINE_HEIGHT_RATIO);
+  if (lh < minLh) {
+    return { ...style, lineHeight: minLh };
+  }
+  return style;
+}
+
 function Text({
  className,
  asChild = false,
@@ -151,12 +173,19 @@ function Text({
        }
      : undefined;

+  const flatStyle = StyleSheet.flatten([
+    { textAlign: 'left' as const },
+    typographyStyle,
+    style,
+  ]) as TextStyle;
+  const resolvedStyle = ensureMinimumLineHeight(flatStyle);
+
  return (
    <Component
      className={cn(textVariants({ variant }), textClass, className)}
      role={variant ? ROLE[variant] : undefined}
      aria-level={variant ? ARIA_LEVEL[variant] : undefined}
-      style={[{ textAlign: 'left' }, typographyStyle, style]}
+      style={resolvedStyle}
      {...props}
    />
  );
--- a/app-expo/src/core/typography-context.tsx
+++ b/app-expo/src/core/typography-context.tsx
@@ -1,12 +1,14 @@
 /**
- * Typography context for large text mode (大字模式).
+ * Global typography from design tokens.
+ *
+ * - **关大字模式** → `typography.large`（舒适基准，不用过小的 `normal` 档）
+ * - **开大字模式** → `typography.xlarge`（一级页、正文等整体再放大一档）
+ *
+ * 对话气泡等仍可在页面内用 `largeText` 做更大一级的 token 选择。
 *
 * Uses React Context instead of NativeWind vars() because vars() returns empty
- * objects on native (iOS/Android), so CSS variables never cascade to children.
- * See: https://github.com/nativewind/nativewind/issues/1113
- *
- * NativeWind vars() docs (works on web only):
- * https://www.nativewind.dev/docs/api/vars
+ * objects on native (iOS/Android). See:
+ * https://github.com/nativewind/nativewind/issues/1113
 */
 import React, {
  createContext,
@@ -19,18 +21,23 @@ import { useAppSettings } from '@/hooks/use-app-settings';

 import tokens from '../../design-tokens.json';

-export type TypographyMode = 'normal' | 'large';
+export type TypographyScale = 'large' | 'xlarge';

 export type TypographyTokens = Record<string, number>;

 const TypographyContext = createContext<TypographyTokens | null>(null);

+const SCALE: Record<TypographyScale, TypographyTokens> = {
+  large: tokens.typography.large as TypographyTokens,
+  xlarge: tokens.typography.xlarge as TypographyTokens,
+};
+
 export function TypographyProvider({ children }: PropsWithChildren) {
  const { largeText } = useAppSettings();
-  const typography = useMemo(() => {
-    const mode: TypographyMode = largeText ? 'large' : 'normal';
-    return tokens.typography[mode] as TypographyTokens;
-  }, [largeText]);
+  const typography = useMemo(
+    () => SCALE[largeText ? 'xlarge' : 'large'],
+    [largeText],
+  );

  return (
    <TypographyContext.Provider value={typography}>
--- a/app-expo/tailwind.config.js
+++ b/app-expo/tailwind.config.js
@@ -25,7 +25,9 @@ const typographyVars = (mode) =>
    ]),
  );

-// Use default theme for Tailwind base (runtime theme switch via ThemeProvider)
+// Use default theme for Tailwind base (runtime theme switch via ThemeProvider).
+// Typography vars use the same comfortable scale as TypographyProvider (large),
+// not the compact `normal` tier — see typography-context.tsx
 const defaultLight = tokens.colors.default.light;
 const defaultDark = tokens.colors.default.dark;

@@ -35,7 +37,7 @@ const rootVariables = Object.fromEntries([
    value,
  ]),
  ['--radius', px(tokens.radius.default)],
-  ...Object.entries(typographyVars('normal')),
+  ...Object.entries(typographyVars('large')),
 ]);

 const darkVariables = Object.fromEntries(