fix: eliminate deprecated cyan, glass-border, and off-palette colors site-wide

- Replace all rgba(6,182,212,...) cyan focus borders and accents with
  rgba(249,115,22,...) ember orange across 21+ component files
- Remove all var(--glass-border) references (undefined variable) with
  var(--color-border-default) across 24 files
- Remove deprecated blur orbs and glass-morphism effects from
  SurveyPage, SurveyThankYouPage, and LoginPage
- Migrate landing.css from hardcoded hex to CSS custom properties
  (~97 replacements for single-source theming)
- Fix off-palette grays in FlowPilotAnalyticsPage chart styling
  (#8891a0 → #848b9b, #18191f → var(--color-bg-card))
- Update stale comments: "cyan brand" → "accent brand" in GlowEdge,
  "gradient cyan square" → "gradient orange square" in BrandLogo
- Rename glow-cyan SVG filter ID to glow-accent
- Fix category color comment: "cyan" → "deep orange"

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

frontend/src/components/dashboard/StartSessionInput.tsx

@@ -199,7 +199,7 @@ export function StartSessionInput() {
       <div className={cn(
         'relative rounded-2xl border bg-card transition-all',
         isDragOver ? 'border-primary/50 bg-primary/5' : 'border-border',
-        'focus-within:border-[rgba(6,182,212,0.3)] focus-within:ring-1 focus-within:ring-primary/20'
+        'focus-within:border-[rgba(249,115,22,0.3)] focus-within:ring-1 focus-within:ring-primary/20'
       )}>
         {/* Drag overlay */}
         {isDragOver && (
@@ -277,7 +277,7 @@ export function StartSessionInput() {
               onChange={(e) => setLogContent(e.target.value)}
               placeholder="Paste event viewer logs, error messages, PowerShell output..."
               rows={4}
-              className="w-full resize-none rounded-lg border border-border bg-background p-3 font-mono text-xs text-foreground placeholder:text-muted-foreground focus:border-[rgba(6,182,212,0.3)] focus:outline-none"
+              className="w-full resize-none rounded-lg border border-border bg-background p-3 font-mono text-xs text-foreground placeholder:text-muted-foreground focus:border-[rgba(249,115,22,0.3)] focus:outline-none"
             />
           </div>
         )}