Reduce post-synthesis UI flicker by removing 1s status timer.

Refresh status every 60s only, shorten synth log, update log before audio, and isolate repaint regions.

Co-authored-by: Cursor <cursoragent@cursor.com>

app.py

@@ -6,6 +6,7 @@ Gradio Web 中控：音色锁定 → Whisper 识别 → Gemma4 润色 → ChatTT
 from __future__ import annotations
 
 import logging
+import re
 import shutil
 import sys
 import uuid
@@ -127,16 +128,27 @@ def ui_check_ollama() -> str:
 # ---------------------------------------------------------------------------
 # 模块 4：ChatTTS 音频合成
 # ---------------------------------------------------------------------------
-def ui_synthesize(polished_text: str, voice_label: str) -> tuple[str | None, str]:
+def _short_synth_log(msg: str, ok: bool) -> str:
-    """【TTS 合成】生成最终 wav 配音文件。"""
+    """合成日志简短显示，避免长路径触发大面积重绘闪屏。"""
+    if not ok:
+        return f"❌ {msg}"
+
+    chars = re.search(r"朗读\s*(\d+)\s*字", msg)
+    segs = re.search(r"共\s*(\d+)\s*段", msg)
+    if chars:
+        seg_note = f"，{segs.group(1)} 段拼接" if segs else ""
+        return f"✅ 配音完成（{chars.group(1)} 字{seg_note}）。请用下方播放器试听、下载。"
+    return "✅ 配音完成。请用下方播放器试听、下载。"
+
+
+def ui_synthesize(polished_text: str, voice_label: str) -> tuple[str, str | None]:
+    """【TTS 合成】生成最终 wav 配音文件。先更新日志再更新播放器，减轻闪屏。"""
     if not polished_text or not polished_text.strip():
-        return None, "请先完成 Gemma4 润色。"
+        return "请先完成 Gemma4 润色。", None
 
     voice_id = label_to_voice_id(voice_label)
     ok, msg, wav_path = generate_voice(polished_text, voice_id=voice_id)
-    if ok and wav_path:
+    return _short_synth_log(msg, ok), wav_path if ok else None
-        return wav_path, f"✅ {msg}"
-    return None, f"❌ {msg}"
 
 
 # ---------------------------------------------------------------------------
@@ -863,10 +875,25 @@ gradio-app,
 .status-err { border-left-color: #ef4444 !important; background: #2a1515 !important; }
 .status-err .status-body { color: #fecaca !important; }
 
+/* 状态栏与播放器隔离重绘，减轻合成完成后的闪屏 */
+.status-row {
+    contain: layout style paint;
+    min-height: 88px;
+}
 .gradio-container .audio-container,
 .gradio-container .upload-container {
     border: 2px dashed #4b5563 !important;
     background: #1a2332 !important;
+    contain: layout style paint;
+    min-height: 100px;
+}
+.gradio-container .audio-container audio,
+.gradio-container .audio-container canvas,
+.gradio-container .waveform-container {
+    background: #1a2332 !important;
+}
+.gradio-container .pipeline-step-card textarea {
+    contain: layout style;
 }
 
 footer { visibility: hidden; }
@@ -918,11 +945,8 @@ def ui_check_ollama_html(force: bool = False) -> str:
 
 
 def ui_initial_load() -> tuple[str, str]:
-    """首屏立即返回，不发起网络请求，避免平板白屏等待。"""
+    """首屏加载：检测 Ollama + 音色（仅一次，不用高频 Timer 避免闪屏）。"""
-    return (
+    return ui_refresh_status_html(force=False)
-        _status_html("Ollama 节点", "后台检测中，请稍候…", "warn"),
-        ui_speaker_status_html(),
-    )
 
 
 def ui_refresh_status_html(force: bool = False) -> tuple[str, str]:
@@ -998,19 +1022,13 @@ def build_app() -> gr.Blocks:
             outputs=[ollama_status, speaker_status],
         )
 
-        # 首屏秒开：仅本地检测音色，Ollama 延后到 Timer
         demo.load(
             fn=ui_initial_load,
             outputs=[ollama_status, speaker_status],
         )
 
-        # 1 秒后后台检测 Ollama；之后每 30s 刷新（30s 内走缓存）
+        # 仅低频刷新状态（去掉 1s Timer，避免合成后整页闪屏）
-        status_timer = gr.Timer(value=1, active=True)
+        status_timer_slow = gr.Timer(value=60, active=True)
-        status_timer.tick(
-            fn=lambda: ui_refresh_status_html(force=False),
-            outputs=[ollama_status, speaker_status],
-        )
-        status_timer_slow = gr.Timer(value=30, active=True)
         status_timer_slow.tick(
             fn=lambda: ui_refresh_status_html(force=True),
             outputs=[ollama_status, speaker_status],
@@ -1100,7 +1118,8 @@ def build_app() -> gr.Blocks:
                 synth_btn.click(
                     ui_synthesize,
                     [polished_text, tts_voice],
-                    [output_audio, synth_log],
+                    [synth_log, output_audio],
+                    show_progress="hidden",
                 )
 
             # ---- Tab 3: 一键生产 ----