fix(security): private temp dir for docker installer, https for OMDb, md5 non-security flag

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -13,6 +13,7 @@ Follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) · versioned wi
 - **Voice list rows no longer show the "Source unknown" badge** (it crowded the play buttons). The badge stays in the voice inspector, next to the Source & consent panel.
 
 ### Fixed
+- **Security hardening (Sonar findings).** The Docker installer downloads `get-docker.sh` into a private `mkdtemp` dir (not a predictable `/tmp` path) and removes it afterwards; the OMDb poster lookup uses HTTPS; the fish.audio cache key marks MD5 as `usedforsecurity=False`.
 - **Background jobs could be garbage-collected mid-run.** Fire-and-forget `asyncio.create_task` calls (magazine, conversation, tts, stt, library, sources) now go through `core.tasks.spawn`, which keeps a strong reference until the task ends and logs failures by exception class only.
 - **Voice archetype gallery broke `npm run check:frontend`**: its `say` helper collided with `magazine.js`; renamed to `archSay`.
 - **Export failed with HTTP 500 when provenance tagging failed** (EPUB/ZIP/article MP3 with audio ffmpeg cannot tag); it now ships the untagged file and logs a warning.

guided_installer.py

@@ -6,6 +6,7 @@ import platform
 import queue
 import shutil
 import subprocess
+import tempfile
 import threading
 import webbrowser
 from pathlib import Path
@@ -186,7 +187,7 @@ class GuidedInstaller(tk.Tk):
             self.log.see("end")
         self.after(120, self._drain_log)
 
-    def run_threaded(self, title: str, commands: list[list[str]]) -> None:
+    def run_threaded(self, title: str, commands: list[list[str]], cleanup_dir: str | None = None) -> None:
         def worker():
             self.log_line(f"\n== {title} ==")
             for cmd in commands:
@@ -203,6 +204,8 @@ class GuidedInstaller(tk.Tk):
                 except Exception as exc:
                     self.log_line(f"Failed: {exc}")
                     break
+            if cleanup_dir:
+                shutil.rmtree(cleanup_dir, ignore_errors=True)
         threading.Thread(target=worker, daemon=True).start()
 
     def command_ok(self, cmd: list[str]) -> bool:
@@ -260,11 +263,13 @@ class GuidedInstaller(tk.Tk):
             "Run Docker's official Linux convenience installer?\n\nThis may ask for sudo privileges and needs internet access.",
         ):
             return
+        tmp = tempfile.mkdtemp(prefix="docker-install-")  # 0700, unpredictable name
+        script = os.path.join(tmp, "get-docker.sh")
         self.run_threaded("Install Docker", [
-            ["curl", "-fsSL", "https://get.docker.com", "-o", "/tmp/get-docker.sh"],
-            ["sh", "/tmp/get-docker.sh"],
+            ["curl", "-fsSL", "https://get.docker.com", "-o", script],
+            ["sh", script],
             ["docker", "version"],
-        ])
+        ], cleanup_dir=tmp)
 
     def generate_compose(self) -> None:
         GENERATED_DIR.mkdir(parents=True, exist_ok=True)

routes/sources.py

@@ -875,7 +875,7 @@ async def fishaudio_voices(request: Request):
         params["tag"] = tags
     import hashlib
     cache_dir = CONFIG_DIR / "fishaudio_cache"
-    cache_key = hashlib.md5(json.dumps(params, sort_keys=True, default=str).encode()).hexdigest()
+    cache_key = hashlib.md5(json.dumps(params, sort_keys=True, default=str).encode(), usedforsecurity=False).hexdigest()
     cache_file = cache_dir / f"{cache_key}.json"
     try:
         r = await asyncio.to_thread(
@@ -1176,7 +1176,7 @@ async def movie_poster(title: str = ""):
     clean = re.sub(r"\s*\(.*?\)\s*$", "", title).strip()
     result = {"poster": "", "year": "", "title": title}
     try:
-        url = f"http://www.omdbapi.com/?t={_q(clean)}&type=movie&apikey=trilogy"
+        url = f"https://www.omdbapi.com/?t={_q(clean)}&type=movie&apikey=trilogy"
         r = await asyncio.to_thread(lambda: requests.get(url, timeout=8))
         if r.ok:
             d = r.json()