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/components/sidebar/perfProbe/SidebarPerfProbeMonitorTab.tsx

@@ -12,7 +12,6 @@ import PerfProbeMetricCard, { PerfProbeMetricSection } from './PerfProbeMetricCa
 import PerfOverlayAppearanceControls from './PerfOverlayAppearanceControls';
 import PerfOverlayModeControls from './PerfOverlayModeControls';
 import PerfLivePollControls from './PerfLivePollControls';
-import PerfCoverThreadsControl from './PerfCoverThreadsControl';
 
 function memoryBarPct(rssKb: number, maxKb: number): number {
   if (maxKb <= 0) return 0;
@@ -61,7 +60,6 @@ export default function SidebarPerfProbeMonitorTab() {
       <PerfOverlayModeControls />
       <PerfOverlayAppearanceControls />
       <PerfLivePollControls />
-      <PerfCoverThreadsControl />
       <PerfProbeMetricSection title="Pipeline overlays" hint="Rust / UI queues">
         <PerfProbeMetricCard
           label="FPS"