feat: add Tauri desktop chat app with React + TypeScript

tauri-app/dist/assets/index-Ci29W9gt.css

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+.sidebar{width:260px;min-width:260px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{display:flex;align-items:center;padding:14px 14px 12px;border-bottom:1px solid var(--border);gap:8px}.sidebar-brand{display:flex;align-items:center;gap:8px;flex:1}.brand-icon{font-size:1.1rem}.brand-name{font-size:.95rem;font-weight:700;letter-spacing:-.01em}.icon-btn{background:none;border:none;color:var(--text2);cursor:pointer;font-size:1rem;padding:4px 6px;border-radius:var(--radius-sm);transition:background .15s,color .15s;line-height:1}.icon-btn:hover{background:var(--bg4);color:var(--text)}.settings-panel{padding:12px 14px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:6px;background:var(--bg3)}.settings-label{font-size:.7rem;font-weight:600;color:var(--text3);text-transform:uppercase;letter-spacing:.05em}.settings-input{background:var(--bg4);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.8rem;padding:6px 10px;outline:none;transition:border-color .15s;font-family:inherit}.settings-input:focus{border-color:var(--accent)}.model-section{padding:10px 14px;border-bottom:1px solid var(--border)}.model-row{display:flex;align-items:center;gap:8px}.status-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0;transition:background .3s}.status-dot.status-ok{background:var(--success);box-shadow:0 0 6px var(--success)}.status-dot.status-error{background:var(--danger)}.status-dot.status-loading{background:var(--warning);animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.model-select{flex:1;background:var(--bg4);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.78rem;padding:5px 8px;outline:none;cursor:pointer;min-width:0;font-family:inherit}.model-select:focus{border-color:var(--accent)}.sidebar-actions{padding:10px 14px 6px}.new-chat-btn{width:100%;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);padding:8px 12px;font-size:.82rem;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;transition:background .15s,transform .1s;font-family:inherit}.new-chat-btn:hover{background:var(--accent2)}.new-chat-btn:active{transform:scale(.98)}.chat-list{flex:1;overflow-y:auto;padding:6px 8px;display:flex;flex-direction:column;gap:1px}.chat-list-empty{text-align:center;color:var(--text3);font-size:.8rem;padding:20px 0}.chat-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:var(--radius-sm);cursor:pointer;font-size:.82rem;color:var(--text2);transition:background .1s,color .1s;position:relative}.chat-item:hover{background:var(--bg3);color:var(--text)}.chat-item.active{background:var(--bg4);color:var(--text)}.chat-item-icon{font-size:.85rem;flex-shrink:0;opacity:.6}.chat-item-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-item-del{opacity:0;background:none;border:none;color:var(--danger);cursor:pointer;font-size:.75rem;padding:2px 5px;border-radius:4px;line-height:1;transition:opacity .15s,background .15s;flex-shrink:0}.chat-item:hover .chat-item-del{opacity:1}.chat-item-del:hover{background:#f0404026}.sidebar-footer{padding:10px 14px;border-top:1px solid var(--border)}.footer-version{font-size:.7rem;color:var(--text3)}.msg-edit-container{width:100%;max-width:780px}.msg-edit-textarea{width:100%;background:var(--bg3);border:1px solid var(--accent);border-radius:var(--radius);color:var(--text);font-size:.9rem;font-family:inherit;padding:10px 14px;resize:none;min-height:80px;outline:none;line-height:1.6}.msg-edit-actions{display:flex;gap:6px;margin-top:8px}.btn-primary{background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);padding:6px 14px;font-size:.8rem;font-weight:600;cursor:pointer;font-family:inherit;transition:background .15s}.btn-primary:hover{background:var(--accent2)}.btn-secondary{background:var(--bg4);color:var(--text2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 14px;font-size:.8rem;cursor:pointer;font-family:inherit;transition:background .15s}.btn-secondary:hover{background:var(--bg5);color:var(--text)}.btn-ghost{background:none;color:var(--text3);border:none;border-radius:var(--radius-sm);padding:6px 10px;font-size:.8rem;cursor:pointer;font-family:inherit;transition:color .15s}.btn-ghost:hover{color:var(--text2)}.msg-actions{display:flex;gap:4px;margin-top:5px;opacity:0;transition:opacity .15s}.msg-wrapper:hover .msg-actions{opacity:1}.action-btn{background:none;border:1px solid var(--border);color:var(--text2);border-radius:var(--radius-sm);padding:3px 9px;font-size:.72rem;cursor:pointer;transition:all .15s;font-family:inherit;white-space:nowrap}.action-btn:hover{background:var(--bg3);color:var(--text);border-color:var(--border2)}.action-btn.copied{color:var(--success);border-color:var(--success)}.action-btn.danger:hover{background:#f040401Line truncated