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/styles/components/modal.css

@@ -219,12 +219,27 @@
   font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
   font-size: 11.5px;
   line-height: 1.5;
+  user-select: text;
+  -webkit-user-select: text;
+  cursor: text;
 }
 
 .perf-logs__line {
   white-space: pre-wrap;
   word-break: break-word;
   color: var(--text-primary);
+  user-select: text;
+  -webkit-user-select: text;
+}
+
+.perf-tuning {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.perf-tuning__hint {
+  margin: 0;
 }
 
 .perf-logs__line--marker {
@@ -265,6 +280,21 @@
   background: color-mix(in srgb, var(--accent) 14%, transparent);
 }
 
+.perf-logs__context-menu {
+  position: fixed;
+  z-index: 10050;
+  min-width: 140px;
+}
+
+.perf-logs__context-item {
+  width: 100%;
+  border: none;
+  background: transparent;
+  font: inherit;
+  color: inherit;
+  text-align: left;
+}
+
 .perf-monitor-empty {
   display: flex;
   flex-direction: column;