refactor: Script Library and Builder design critique fixes

Library:
- Clear CTA hierarchy: "Build New Script" primary, "Import Script" ghost,
  "Manage" demoted to text link
- "New from Script" → "Import Script" (clearer label)

Script Builder:
- Add suggestion chips for first-time users (4 common MSP tasks)
- Chips auto-hide after first message

Design system normalization:
- ScriptPreviewModal: bg-black/80 → bg-black/40, text-blue-400 → text-accent-text,
  emerald save button → primary, inline rgba → CSS variables
- ScriptCodeBlock: bg-[rgba(0,0,0,0.3)] → bg-code, text-blue-400 → text-accent-text,
  text-text-muted typo fixed, emerald button → ghost style
- TemplateCard: emerald/amber/rose badges → success-dim/warning-dim/danger-dim,
  ShieldAlert amber → warning token
- ParameterDetectorStepper: blue focus ring → orange, amber → warning token,
  "Candidate" → "Variable" in stepper progress

Jargon clarification:
- "Detect Parameters" → "Find Variables"
- "Detected Parameters" → "Configurable Variables"
- "Parameters (N)" → "Variables (N)"
- Detection summary copy reworded for clarity

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

frontend/src/components/scripts/ParameterizeAndSavePanel.tsx

@@ -92,7 +92,7 @@ export function ParameterizeAndSavePanel({
     if (detected.length > 0) {
       setShowStepper(true)
     } else {
-      setDetectionSummary('No parameters detected — script will be saved as-is. Parameter detection currently supports PowerShell only.')
+      setDetectionSummary('No configurable values found — the script will be saved as-is. Variable detection currently supports PowerShell only.')
     }
   }, [])
 
@@ -298,7 +298,7 @@ export function ParameterizeAndSavePanel({
                   'disabled:opacity-50 disabled:cursor-not-allowed'
                 )}
               >
-                Detect Parameters
+                Find Variables
               </button>
             </section>
           )}
@@ -313,7 +313,7 @@ export function ParameterizeAndSavePanel({
                 <pre className="p-3 text-xs font-mono text-foreground whitespace-pre-wrap break-all">
                   {workingScript.split(/({{.*?}})/).map((part, i) =>
                     /^{{.*}}$/.test(part)
-                      ? <span key={i} className="text-amber-400 font-semibold">{part}</span>
+                      ? <span key={i} className="text-warning font-semibold">{part}</span>
                       : <span key={i}>{part}</span>
                   )}
                 </pre>
@@ -332,7 +332,7 @@ export function ParameterizeAndSavePanel({
           {showStepper && candidates.length > 0 && (
             <section className="space-y-2">
               <p className="font-sans text-xs uppercase tracking-widest text-muted-foreground">
-                Detected Parameters
+                Configurable Variables
               </p>
               <ParameterDetectorStepper
                 candidates={candidates}
@@ -348,7 +348,7 @@ export function ParameterizeAndSavePanel({
           {parameters.length > 0 && !showStepper && (
             <section className="space-y-2">
               <p className="font-sans text-xs uppercase tracking-widest text-muted-foreground">
-                Parameters ({parameters.length})
+                Variables ({parameters.length})
               </p>
               <div className="space-y-1">
                 {parameters.map((p) => (
@@ -357,7 +357,7 @@ export function ParameterizeAndSavePanel({
                     className="flex items-center justify-between rounded-lg bg-elevated px-3 py-2"
                   >
                     <div className="flex items-center gap-2">
-                      <code className="text-xs font-mono text-amber-400">{`{{${p.key}}}`}</code>
+                      <code className="text-xs font-mono text-warning">{`{{${p.key}}}`}</code>
                       <span className="text-xs text-muted-foreground">{p.label}</span>
                     </div>
                     <span className="text-[0.625rem] text-muted-foreground uppercase tracking-wide">