Fundament: Doku, Testanpassungen, Restbereinigung

- AGENTS.md und README.md auf Craftvia umgeschrieben (Regeln, Andockpunkte,
  Stack mit Garage, tsx-Tests, Gate, Demo-Logins)
- ISMS-Dokumente entfernt (SPEC, Prototypen, Lane-Prompts, Übergaben, Konzepte
  Incidents/Framework); Fundament-Doku (Deploy, Sicherheit, Backup, Identity) bleibt
- Fundament-Tests an Craftvia-Rollen/Branding angepasst, Resttreffer
  certvia/isms in Skripten und Kommentaren bereinigt

Gate: prisma generate, migrate status, tsc, lint, build, 22/22 Testskripte grün.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/components/backup-target-form.tsx

@@ -75,7 +75,7 @@ export function BackupTargetForm({
           </div>
           <div className="space-y-1.5">
             <Label htmlFor="bk-bucket">Bucket</Label>
-            <Input id="bk-bucket" name="backupS3Bucket" defaultValue={initial.backupS3Bucket} placeholder="certvia-backups" autoComplete="off" />
+            <Input id="bk-bucket" name="backupS3Bucket" defaultValue={initial.backupS3Bucket} placeholder="craftvia-backups" autoComplete="off" />
           </div>
           <div className="space-y-1.5">
             <Label htmlFor="bk-region">Region</Label>

src/components/ui/button.tsx

@@ -8,7 +8,7 @@ const buttonVariants = cva(
   {
     variants: {
       variant: {
-        // Primär-Buttons mit dem Certvia-Verlauf (--grad-primary)
+        // Primär-Buttons in Lotsenblau (--grad-primary = Vollfarbe)
         default: "bg-grad-soft text-white hover:opacity-90",
         outline:
           "border-border bg-background hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:border-input dark:bg-input/30 dark:hover:bg-input/50",