feat(feedback): add centralized feedback system with AI-generated titles

- Add shared-feedback-types package with TypeScript types
- Add shared-feedback-service package with factory function
- Add shared-feedback-ui package with Svelte 5 components
- Add feedback module to mana-core-auth backend
- Add AI service using Gemini 2.0 Flash for title/category generation
- Add database schema and migration for feedback tables
- Integrate feedback page into Chat web app
- Add CORS support for X-App-Id header
- Add COMMANDS.md documentation for all dev commands

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

packages/shared-feedback-types/src/api.ts

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+/**
+ * API request/response types for feedback
+ */
+
+import type { Feedback, FeedbackCategory, FeedbackStatus } from './feedback';
+
+export interface CreateFeedbackInput {
+	title?: string;
+	feedbackText: string;
+	category?: FeedbackCategory;
+	deviceInfo?: Record<string, unknown>;
+}
+
+export interface FeedbackQueryParams {
+	appId?: string;
+	status?: FeedbackStatus;
+	category?: FeedbackCategory;
+	sort?: 'votes' | 'recent';
+	limit?: number;
+	offset?: number;
+}
+
+export interface FeedbackResponse {
+	success: boolean;
+	feedback?: Feedback;
+	error?: string;
+}
+
+export interface FeedbackListResponse {
+	success: boolean;
+	items: Feedback[];
+	total: number;
+	error?: string;
+}
+
+export interface VoteResponse {
+	success: boolean;
+	newVoteCount: number;
+	userHasVoted: boolean;
+	error?: string;
+}

packages/shared-feedback-types/src/feedback.ts

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+/**
+ * Core feedback types
+ */
+
+export type FeedbackCategory = 'bug' | 'feature' | 'improvement' | 'question' | 'other';
+
+export type FeedbackStatus =
+	| 'submitted'
+	| 'under_review'
+	| 'planned'
+	| 'in_progress'
+	| 'completed'
+	| 'declined';
+
+export interface Feedback {
+	id: string;
+	userId: string;
+	appId: string;
+	title?: string;
+	feedbackText: string;
+	category: FeedbackCategory;
+	status: FeedbackStatus;
+	isPublic: boolean;
+	adminResponse?: string;
+	voteCount: number;
+	userHasVoted: boolean;
+	deviceInfo?: Record<string, unknown>;
+	createdAt: string;
+	updatedAt: string;
+	publishedAt?: string;
+	completedAt?: string;
+}
+
+export interface FeedbackVote {
+	id: string;
+	feedbackId: string;
+	userId: string;
+	createdAt: string;
+}
+
+export const FEEDBACK_CATEGORY_LABELS: Record<FeedbackCategory, string> = {
+	bug: 'Bug',
+	feature: 'Feature',
+	improvement: 'Verbesserung',
+	question: 'Frage',
+	other: 'Sonstiges',
+};
+
+export const FEEDBACK_STATUS_CONFIG: Record<
+	FeedbackStatus,
+	{ label: string; color: string; icon: string }
+> = {
+	submitted: { label: 'Eingereicht', color: '#999', icon: 'clock' },
+	under_review: { label: 'Wird geprüft', color: '#3498DB', icon: 'eye' },
+	planned: { label: 'Geplant', color: '#9B59B6', icon: 'calendar' },
+	in_progress: { label: 'In Arbeit', color: '#F39C12', icon: 'loader' },
+	completed: { label: 'Umgesetzt', color: '#27AE60', icon: 'check-circle' },
+	declined: { label: 'Abgelehnt', color: '#E74C3C', icon: 'x-circle' },
+};

packages/shared-feedback-types/src/index.ts

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+/**
+ * Shared feedback types for Manacore monorepo
+ *
+ * This package contains TypeScript types for feedback submissions,
+ * voting, and API contracts.
+ */
+
+// Feedback types
+export {
+	type FeedbackCategory,
+	type FeedbackStatus,
+	type Feedback,
+	type FeedbackVote,
+	FEEDBACK_CATEGORY_LABELS,
+	FEEDBACK_STATUS_CONFIG,
+} from './feedback';
+
+// API types
+export {
+	type CreateFeedbackInput,
+	type FeedbackQueryParams,
+	type FeedbackResponse,
+	type FeedbackListResponse,
+	type VoteResponse,
+} from './api';