feat(community): Phase 3.C — Identität (Avatar + Klarname-Toggle + Karma + Eulen-Profil)

Macht aus den Pseudonymen echte Charaktere ohne Klarnamen-Zwang.

Pixel-Identicon-Avatar (3.C.2):
- generateAvatarSvg(displayHash) — pure-function, deterministisch.
  5×5 left-mirrored Identicon mit HSL-Foreground/Background aus dem
  Hash. Inline-SVG, kein Storage, kein img-load-Flicker.
- <EulenAvatar> Component im Package, in ItemCard neben dem Pseudonym.

Klarname-Toggle (3.C.1):
- auth.users + community_show_real_name boolean (default off, opt-in).
- PATCH /api/v1/me/profile akzeptiert communityShowRealName.
- mana-analytics LEFT JOINs auth.users → bei opt-in liefert auth-
  required /public + /me/reacted Endpoints zusätzlich realName.
- Anonymous /api/v1/public/feedback/* zeigt realName NIE — auch nicht
  wenn opted-in. Public-Mirror bleibt für SEO + Privacy safe.
- Migration 008_community_identity.sql lokal + prod eingespielt.

Karma-System (3.C.3):
- auth.users + community_karma int. toggleReaction increment/decrement
  am Author-User (Self-Reactions zählen nicht — kein Self-Farming).
- KARMA_THRESHOLDS + tierFromKarma() im Package: Bronze (0-9) /
  Silver (10-49) / Gold (50-199) / Platin (200+).
- ItemCard zeigt Tier-Dot neben dem Pseudonym, Title-Tooltip mit
  Karma-Zahl. Floor-clamped at 0.

Eulen-Profil (3.C.4):
- GET /api/v1/public/feedback/eule/{hash} — alle public-Posts dieser
  Eule + aggregiertes Karma. SHA256-Format-Validation.
- /community/eule/[hash] Public-SSR-Route mit Avatar-Hero, Tier-Badge,
  Karma-Counter, Post-Liste. Author-Klick im ItemCard navigiert hin.
- publicFeedbackService.getEulenProfile() im Package.

PublicFeedbackItem erweitert um displayHash (public Pseudonym-ID,
SHA256 ist one-way → safe to expose) + karma + optional realName.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/feedback/src/feedback.ts

@@ -54,6 +54,9 @@ export interface PublicFeedbackItem {
 	status: FeedbackStatus;
 	moduleContext: string | null;
 	parentId: string | null;
+	/** Pseudonym-ID — non-reversible SHA256(userId+secret). Stable
+	 *  across sessions, used for avatar generation and Eulen-Profil-URLs. */
+	displayHash: string;
 	displayName: string;
 	reactions: Partial<Record<string, number>>;
 	score: number;
@@ -62,6 +65,11 @@ export interface PublicFeedbackItem {
 	updatedAt: string;
 	/** Auth-only: which emojis the requesting user has reacted with. */
 	myReactions?: string[];
+	/** Auth-only + opt-in: post-author's real name when they enabled
+	 *  the Klarname-Toggle. Anonymous public-mirror NEVER includes this. */
+	realName?: string;
+	/** Author's community karma — public, drives the tier-badge. */
+	karma?: number;
 }
 
 /**
@@ -128,6 +136,34 @@ export const FEEDBACK_CATEGORY_LABELS: Record<FeedbackCategory, string> = {
 	other: 'Sonstiges',
 };
 
+/**
+ * Karma → Tier-Mapping. Bronze ist Default für jeden, Tier wird sichtbar
+ * neben dem Pseudonym in ItemCard.
+ */
+export type KarmaTier = 'bronze' | 'silver' | 'gold' | 'platinum';
+
+export const KARMA_THRESHOLDS = {
+	bronze: 0,
+	silver: 10,
+	gold: 50,
+	platinum: 200,
+} as const satisfies Record<KarmaTier, number>;
+
+export const KARMA_TIER_CONFIG: Record<KarmaTier, { label: string; emoji: string; color: string }> =
+	{
+		bronze: { label: 'Bronze', emoji: '🦉', color: '#a16207' },
+		silver: { label: 'Silver', emoji: '🦉', color: '#737373' },
+		gold: { label: 'Gold', emoji: '🦉', color: '#d97706' },
+		platinum: { label: 'Platin', emoji: '🦉', color: '#7c3aed' },
+	};
+
+export function tierFromKarma(karma: number): KarmaTier {
+	if (karma >= KARMA_THRESHOLDS.platinum) return 'platinum';
+	if (karma >= KARMA_THRESHOLDS.gold) return 'gold';
+	if (karma >= KARMA_THRESHOLDS.silver) return 'silver';
+	return 'bronze';
+}
+
 export const FEEDBACK_STATUS_CONFIG: Record<
 	FeedbackStatus,
 	{ label: string; color: string; icon: string }