feat(desktop): port v0.11.4-v0.15.2 from Tauri to Electron + Discord-parity audio (v0.16.0)

Chronological port of every Tauri release commit (v0.11.4 -> v0.15.2)
into the Electron rebuild, plus Discord-style audio handling that goes
beyond the Tauri original.

Highlights:
  - All 17 Tauri release commits ported (audio fixes, custom notification
    sound, Discord-style chat UX, profile banner, changelog page,
    Discord-parity call UX, screen-share echo + re-watch UX, audio-loop
    fix).
  - Native napi-rs audio-loopback addon with WASAPI process-loopback:
      * EXCLUDE_TARGET_PROCESS_TREE for full-screen shares -> peers
        never hear themselves echoed back through the capture.
      * INCLUDE_TARGET_PROCESS_TREE for window shares -> only the
        picked window's audio is captured, not the whole OS mixer
        (Discord parity).
      * HWND -> PID resolution via Win32 GetWindowThreadProcessId.
  - Discord-style screen-source picker (thumbnail grid, screens vs
    apps tabs, live-refreshing thumbnails).
  - Hash routing fix for packaged builds (file:// can't resolve
    BrowserRouter paths).
  - Tauri sources removed (apps/desktop/src-tauri).

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

packages/shared/src/auth/profile.ts

@@ -9,6 +9,7 @@ export interface Profile {
   username: string;
   displayName: string;
   avatarUrl: string | null;
+  bannerUrl: string | null;
   statusMessage: string | null;
   presenceState: PresenceState;
   showReadReceipts: boolean;
@@ -22,6 +23,7 @@ type ProfileRow = {
   username: string;
   display_name: string;
   avatar_url: string | null;
+  banner_url: string | null;
   status_message: string | null;
   presence_state: PresenceState;
   show_read_receipts: boolean;
@@ -31,7 +33,7 @@ type ProfileRow = {
 };
 
 const PROFILE_COLS =
-  'user_id, username, display_name, avatar_url, status_message, presence_state, show_read_receipts, allow_dms_from_strangers, is_admin, locale';
+  'user_id, username, display_name, avatar_url, banner_url, status_message, presence_state, show_read_receipts, allow_dms_from_strangers, is_admin, locale';
 
 function toSupportedLocale(raw: string): SupportedLocale {
   return raw === 'de' ? 'de' : 'en';
@@ -43,6 +45,7 @@ function mapProfile(row: ProfileRow): Profile {
     username: row.username,
     displayName: row.display_name,
     avatarUrl: row.avatar_url,
+    bannerUrl: row.banner_url,
     statusMessage: row.status_message,
     presenceState: row.presence_state,
     showReadReceipts: row.show_read_receipts,
@@ -95,6 +98,7 @@ export async function isUsernameAvailable(
 export interface UpdateProfileParams {
   displayName?: string;
   avatarUrl?: string | null;
+  bannerUrl?: string | null;
   statusMessage?: string | null;
   presenceState?: PresenceState;
   showReadReceipts?: boolean;
@@ -112,6 +116,7 @@ export async function updateOwnProfile(
   const patch: ProfileUpdate = {};
   if (params.displayName !== undefined) patch.display_name = params.displayName;
   if (params.avatarUrl !== undefined) patch.avatar_url = params.avatarUrl;
+  if (params.bannerUrl !== undefined) patch.banner_url = params.bannerUrl;
   if (params.statusMessage !== undefined) patch.status_message = params.statusMessage;
   if (params.presenceState !== undefined) patch.presence_state = params.presenceState;
   if (params.showReadReceipts !== undefined) patch.show_read_receipts = params.showReadReceipts;

packages/shared/src/chat/attachments.ts

@@ -53,7 +53,20 @@ export interface CallEventPayload {
   durationSec: number;
 }
 
-export type MessagePayload = TextMessagePayload | CallEventPayload;
+export interface PollOption {
+  id: string;
+  emoji: string;
+  text: string;
+}
+
+export interface PollPayload {
+  v: 1;
+  type: 'poll';
+  question: string;
+  options: PollOption[];
+}
+
+export type MessagePayload = TextMessagePayload | CallEventPayload | PollPayload;
 
 export type ParsedMessagePayload =
   | {
@@ -67,6 +80,11 @@ export type ParsedMessagePayload =
       status: CallEventStatus;
       mediaKind: CallEventKind;
       durationSec: number;
+    }
+  | {
+      kind: 'poll';
+      question: string;
+      options: PollOption[];
     };
 
 export function serializeMessagePayload(payload: MessagePayload): string {
@@ -95,6 +113,34 @@ export function parseMessagePayload(raw: string | null): ParsedMessagePayload {
           durationSec: typeof p.durationSec === 'number' ? p.durationSec : 0,
         };
       }
+      if (obj.type === 'poll') {
+        const p = obj as Partial<PollPayload>;
+        const options = Array.isArray(p.options)
+          ? p.options
+              .map((option, idx) => {
+                const candidate = option as Partial<PollOption>;
+                const text = typeof candidate.text === 'string' ? candidate.text.trim() : '';
+                if (!text) return null;
+                return {
+                  id:
+                    typeof candidate.id === 'string' && candidate.id.trim()
+                      ? candidate.id.trim()
+                      : 'option-' + (idx + 1),
+                  emoji:
+                    typeof candidate.emoji === 'string' && candidate.emoji.trim()
+                      ? candidate.emoji.trim()
+                      : String(idx + 1),
+                  text,
+                };
+              })
+              .filter((option): option is PollOption => option !== null)
+          : [];
+        return {
+          kind: 'poll',
+          question: typeof p.question === 'string' ? p.question.trim() : '',
+          options,
+        };
+      }
       const t = obj as TextMessagePayload;
       return {
         kind: 'text',

packages/shared/src/chat/conversations.ts

@@ -2,19 +2,21 @@ import type { ProfileBrief } from '../friends/index.js';
 import type { AppSupabaseClient } from '../supabase/client.js';
 import type { ConversationSummary } from './types.js';
 
-const PROFILE_BRIEF_COLS = 'user_id, username, display_name, avatar_url';
+const PROFILE_BRIEF_COLS = 'user_id, username, display_name, avatar_url, banner_url';
 
 function mapBrief(row: {
   user_id: string;
   username: string;
   display_name: string;
   avatar_url: string | null;
+  banner_url: string | null;
 }): ProfileBrief {
   return {
     userId: row.user_id,
     username: row.username,
     displayName: row.display_name,
     avatarUrl: row.avatar_url,
+    bannerUrl: row.banner_url,
   };
 }
 

packages/shared/src/friends/index.ts

@@ -6,6 +6,7 @@ export interface ProfileBrief {
   username: string;
   displayName: string;
   avatarUrl: string | null;
+  bannerUrl: string | null;
 }
 
 export type FriendDirection = 'outgoing' | 'incoming';
@@ -19,19 +20,21 @@ export interface Friendship {
   acceptedAt: string | null;
 }
 
-const PROFILE_BRIEF_COLS = 'user_id, username, display_name, avatar_url';
+const PROFILE_BRIEF_COLS = 'user_id, username, display_name, avatar_url, banner_url';
 
 function mapProfileBrief(row: {
   user_id: string;
   username: string;
   display_name: string;
   avatar_url: string | null;
+  banner_url: string | null;
 }): ProfileBrief {
   return {
     userId: row.user_id,
     username: row.username,
     displayName: row.display_name,
     avatarUrl: row.avatar_url,
+    bannerUrl: row.banner_url,
   };
 }
 
@@ -106,6 +109,7 @@ export async function listFriendships(client: AppSupabaseClient): Promise<Friend
       username: '?',
       displayName: '?',
       avatarUrl: null,
+      bannerUrl: null,
     };
     return {
       peer,