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/script-editor/ScriptTemplateEditor.tsx

@@ -356,7 +356,7 @@ export function ScriptTemplateEditor({ templateId, onBack, onSaved }: Props) {
             <select
               value={form.category_id}
               onChange={e => updateField('category_id', e.target.value)}
-              className="w-full rounded-lg border border-border bg-card text-foreground px-3 py-2 text-sm focus:outline-none focus:border-[rgba(6,182,212,0.3)]"
+              className="w-full rounded-lg border border-border bg-card text-foreground px-3 py-2 text-sm focus:outline-none focus:border-[rgba(249,115,22,0.3)]"
             >
               <option value="">Select category…</option>
               {categories.map(c => (
@@ -369,7 +369,7 @@ export function ScriptTemplateEditor({ templateId, onBack, onSaved }: Props) {
             <select
               value={form.complexity}
               onChange={e => updateField('complexity', e.target.value as FormState['complexity'])}
-              className="w-full rounded-lg border border-border bg-card text-foreground px-3 py-2 text-sm focus:outline-none focus:border-[rgba(6,182,212,0.3)]"
+              className="w-full rounded-lg border border-border bg-card text-foreground px-3 py-2 text-sm focus:outline-none focus:border-[rgba(249,115,22,0.3)]"
             >
               <option value="beginner">Beginner</option>
               <option value="intermediate">Intermediate</option>