feat: add Backspace design prototype and rebrand from Opencord

- Add Backspace-design-prototype.html: finalized "Aether Drift" design
  language with warm matte surfaces and subtle frosted glass accents
- Update CLAUDE.md with DESIGN SYSTEM section and remove Discord clone references
- Rename all Opencord references to Backspace across the full codebase
- Archive outdated design experiments and Discord-specific assets
- Add science-backed accessibility fallback (prefers-reduced-transparency)

packages/server/src/routes/auth.ts

@@ -4,7 +4,7 @@ import { getDb, schema } from '../db/index.js';
 import { hashPassword, verifyPassword, signJwt } from '../utils/auth.js';
 import { generateSnowflake } from '../utils/snowflake.js';
 import { config } from '../config.js';
-import type { RegisterRequest, LoginRequest, AuthResponse, User } from '@opencord/shared';
+import type { RegisterRequest, LoginRequest, AuthResponse, User } from '@backspace/shared';
 
 function sanitizeUser(row: typeof schema.users.$inferSelect): User {
   return {

packages/server/src/routes/channels.ts

@@ -4,13 +4,13 @@ import { getDb, schema } from '../db/index.js';
 import { authenticate } from '../utils/auth.js';
 import { generateSnowflake } from '../utils/snowflake.js';
 import { isMember, hasPermission, getChannelServerId, PermissionBits, computePermissions } from '../utils/permissions.js';
-import { permissionsToString } from '@opencord/shared/src/permissions.js';
+import { permissionsToString } from '@backspace/shared/src/permissions.js';
 import { connectionManager } from '../ws/handler.js';
 import type {
   CreateChannelRequest,
   UpdateChannelRequest,
   Channel,
-} from '@opencord/shared';
+} from '@backspace/shared';
 
 function rowToChannel(row: typeof schema.channels.$inferSelect): Channel {
   return {

packages/server/src/routes/dm.ts

@@ -16,7 +16,7 @@ import type {
   PaginatedQuery,
   Attachment,
   Reaction,
-} from '@opencord/shared';
+} from '@backspace/shared';
 
 function sanitizeUser(row: typeof schema.users.$inferSelect): User {
   return {

packages/server/src/routes/livekit.ts

@@ -3,7 +3,7 @@ import { AccessToken } from 'livekit-server-sdk';
 import { authenticate } from '../utils/auth.js';
 import { config } from '../config.js';
 import { getChannelServerId, hasPermission, isDmMember, PermissionBits } from '../utils/permissions.js';
-import type { LiveKitTokenRequest, LiveKitTokenResponse } from '@opencord/shared';
+import type { LiveKitTokenRequest, LiveKitTokenResponse } from '@backspace/shared';
 
 export async function livekitRoutes(app: FastifyInstance): Promise<void> {
   app.post<{ Body: LiveKitTokenRequest & { dmChannelId?: string } }>('/api/livekit/token', {

packages/server/src/routes/messages.ts

@@ -12,7 +12,7 @@ import type {
   User,
   MessageWithUser,
   Reaction,
-} from '@opencord/shared';
+} from '@backspace/shared';
 
 function sanitizeUser(row: typeof schema.users.$inferSelect): User {
   return {

packages/server/src/routes/servers.ts

@@ -4,7 +4,7 @@ import { getDb, schema } from '../db/index.js';
 import { authenticate } from '../utils/auth.js';
 import { generateSnowflake } from '../utils/snowflake.js';
 import { isMember, isServerOwner, hasPermission, computePermissions, PermissionBits } from '../utils/permissions.js';
-import { DEFAULT_EVERYONE_PERMISSIONS, ALL_PERMISSIONS, permissionsToString } from '@opencord/shared/src/permissions.js';
+import { DEFAULT_EVERYONE_PERMISSIONS, ALL_PERMISSIONS, permissionsToString } from '@backspace/shared/src/permissions.js';
 import crypto from 'crypto';
 import { connectionManager } from '../ws/handler.js';
 import type {
@@ -18,7 +18,7 @@ import type {
   MemberWithUser,
   ServerWithChannelsAndMembers,
   Role,
-} from '@opencord/shared';
+} from '@backspace/shared';
 
 function sanitizeUser(row: typeof schema.users.$inferSelect): User {
   return {

packages/server/src/routes/settings.ts

@@ -2,7 +2,7 @@ import type { FastifyInstance } from 'fastify';
 import { eq } from 'drizzle-orm';
 import { getDb, schema } from '../db/index.js';
 import { authenticate } from '../utils/auth.js';
-import type { InstanceStreamingLimits } from '@opencord/shared';
+import type { InstanceStreamingLimits } from '@backspace/shared';
 
 const VALID_RESOLUTIONS = [540, 720, 1080];
 const VALID_FRAMERATES = [30, 45, 60];

packages/server/src/routes/social.ts

@@ -10,7 +10,7 @@ import type {
   FriendRequest,
   SendFriendRequest,
   UpdateFriendRequest,
-} from '@opencord/shared';
+} from '@backspace/shared';
 
 function sanitizeUser(row: typeof schema.users.$inferSelect): User {
   return {

packages/server/src/routes/uploads.ts

@@ -7,7 +7,7 @@ import { eq } from 'drizzle-orm';
 import fs from 'fs';
 import path from 'path';
 import { pipeline } from 'stream/promises';
-import type { Attachment } from '@opencord/shared';
+import type { Attachment } from '@backspace/shared';
 
 export async function uploadRoutes(app: FastifyInstance): Promise<void> {
   // Ensure upload directory exists

packages/server/src/routes/users.ts

@@ -3,7 +3,7 @@ import { eq } from 'drizzle-orm';
 import { getDb, schema } from '../db/index.js';
 import { authenticate } from '../utils/auth.js';
 import { connectionManager } from '../ws/handler.js';
-import type { User, UpdateUserRequest } from '@opencord/shared';
+import type { User, UpdateUserRequest } from '@backspace/shared';
 
 function sanitizeUser(row: typeof schema.users.$inferSelect): User {
   return {

packages/server/src/routes/utils.ts

@@ -15,7 +15,7 @@ export async function utilRoutes(app: FastifyInstance): Promise<void> {
     try {
       const response = await fetch(url, {
         headers: {
-          'User-Agent': 'OpencordBot/1.0',
+          'User-Agent': 'BackspaceBot/1.0',
         },
       });