feat(psylab): rename probe, Tuning tab, log tools, and safe log sanitization (#1027)

* feat(psylab): rename probe UI, add Tuning tab and log copy/export

PsyLab (Ctrl+Shift+D): cover backfill threads move to Tuning; logs gain
selectable text, toolbar copy/export, and a selection-only context menu.

* fix(logging): redact secrets and mask remote hosts in runtime logs

Sanitize lines at append time (buffer, CLI tail, export) and in PsyLab:
Subsonic/auth query params, bearer tokens, password fields, URL userinfo;
remote hostnames partially starred, LAN/localhost left readable.

* fix(logging): UTF-8-safe log sanitization — unbreak playback on em dash

Byte-indexed URL scanning panicked on multi-byte chars (e.g. "—" in stream
logs), killing tokio workers and aborting playback. Iterate by char boundary;
add infallible wrapper on the append hot path.

* docs(changelog): PsyLab UI and safe log sanitization (PR #1027)

src-tauri/src/lib_commands/app_api/core.rs

@@ -49,8 +49,8 @@ pub(crate) struct LogTailDto {
     pub dropped: bool,
 }
 
-/// Incremental tail of the in-memory runtime log buffer for the Performance
-/// Probe Logs tab. `after_seq` is the highest seq the UI already has (omit for
+/// Incremental tail of the in-memory runtime log buffer for the PsyLab Logs tab.
+/// `after_seq` is the highest seq the UI already has (omit for
 /// the initial fetch of the most recent `max` lines).
 #[tauri::command]
 pub(crate) fn tail_runtime_logs(after_seq: Option<u64>, max: Option<usize>) -> LogTailDto {