Write voice metadata atomically

CHANGELOG.md

@@ -5,6 +5,11 @@ Follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) · versioned wi
 
 ---
 
+## [1.20.44] — 2026-08-19
+
+### Fixed
+- **Voice metadata is now written atomically.** Interrupted saves cannot leave truncated `.meta.json` files that make ratings or voice settings disappear.
+
 ## [1.20.43] — 2026-08-19
 
 ### Added

VERSION

@@ -1 +1 @@
-1.20.43
+1.20.44

core/voice.py

@@ -2,8 +2,10 @@
 from __future__ import annotations
 
 import json
+import os
 import re
 import shutil
+import tempfile
 import time
 import uuid
 from datetime import datetime, timezone
@@ -119,7 +121,24 @@ def _load_meta(wav: Path) -> dict:
 
 
 def _save_meta(wav: Path, meta: dict) -> None:
-    _meta_path(wav).write_text(json.dumps(meta, indent=2))
+    # Write beside the final file and replace it atomically. A process exit or
+    # host/container interruption during write must never leave a truncated
+    # meta.json that makes ratings/settings appear to have vanished.
+    target = _meta_path(wav)
+    target.parent.mkdir(parents=True, exist_ok=True)
+    fd, tmp_name = tempfile.mkstemp(prefix=f".{target.name}.", suffix=".tmp", dir=target.parent)
+    try:
+        with os.fdopen(fd, "w", encoding="utf-8") as handle:
+            json.dump(meta, handle, indent=2, ensure_ascii=False)
+            handle.write("\n")
+            handle.flush()
+            os.fsync(handle.fileno())
+        os.replace(tmp_name, target)
+    finally:
+        try:
+            os.unlink(tmp_name)
+        except FileNotFoundError:
+            pass
 
 
 def _picture_path(wav: Path) -> Path | None:

static/index.html

@@ -10,7 +10,7 @@
   <meta name="format-detection" content="telephone=no">
   <meta name="color-scheme" content="light dark">
   <meta name="theme-color" content="#2563EB">
-  <meta name="app-version" content="1.20.43">
+  <meta name="app-version" content="1.20.44">
   <link rel="manifest" href="/manifest.webmanifest">
   <link rel="icon" href="/static/icon.svg" type="image/svg+xml">
   <link rel="apple-touch-icon" href="/static/icon.svg">
@@ -27,7 +27,7 @@
 
   <!-- ── Core styles (local — no CDN dependency for first paint) ────────── -->
   <link rel="stylesheet" href="/static/vendor/mdi/materialdesignicons.min.css">
-  <link rel="stylesheet" href="/static/style.css?v=1.20.43">
+  <link rel="stylesheet" href="/static/style.css?v=1.20.44">
 
 
   <!-- ── Flag icons — non-blocking (loaded async, icons appear after JS) ── -->
@@ -378,7 +378,7 @@ window.toggleNavTree = function(treeId, chevronId) {
 </script>
 
 <!-- loader.js: fetches sections → loads JS modules → removes skeleton -->
-<script src="/static/loader.js?v=1.20.43"></script>
+<script src="/static/loader.js?v=1.20.44"></script>
 
 </body>
 </html>