fix: UI polish — nav labels, date picker, rules engine, error messages

- Sidebar: removed "Master" from nav labels (Leads, Patients, Appointments, Call Log)
- Appointment form: Dept + Doctor in 2-col row, Date below, disabled cascade
- DatePicker: placement="bottom start" + shouldFlip fixes popover positioning
- Team Performance: default to "Week", grid KPI cards, chart legend spacing
- Rules Engine: manual save (removed auto-debounce), Reset to Defaults uses
  DEFAULT_PRIORITY_CONFIG (no template endpoint), removed dead saveTimerRef
- Automation rules: 6 showcase cards with trigger/condition/action, replaced
  agent-specific rule with generic round-robin
- Recording analysis: friendly error message with retry instead of raw Deepgram error
- Sidebar active/hover: brand color reference for theming

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/call-desk/recording-analysis.tsx

@@ -178,7 +178,7 @@ export const RecordingAnalysisSlideout = ({
 
                         {error && !loading && (
                             <div className="flex flex-col items-center gap-3 py-12">
-                                <p className="text-sm text-error-primary">{error}</p>
+                                <p className="text-sm text-tertiary">Transcription is temporarily unavailable. Please try again.</p>
                                 <Button
                                     size="sm"
                                     color="secondary"