feat(sw-dash): Group requests by correlationId with full-page payload modal

- Group request/response entries by correlationId for unified display
- Add IGroupedRequest interface for paired request/response data
- Replace inline payload toggle with Show Payload button
- Create full-page modal with request data on left, response on right
- Support keyboard escape to close modal
- Show REQ/RES status badges in grouped cards

ts_swdash/sw-dash-requests.ts

@@ -21,6 +21,19 @@ export interface ITypedRequestStats {
   avgDurationMs: number;
 }
 
+/**
+ * Grouped request/response pair by correlationId
+ */
+export interface IGroupedRequest {
+  correlationId: string;
+  method: string;
+  request?: ITypedRequestLogEntry;
+  response?: ITypedRequestLogEntry;
+  timestamp: number;
+  durationMs?: number;
+  hasError: boolean;
+}
+
 type TRequestFilter = 'all' | 'outgoing' | 'incoming';
 type TPhaseFilter = 'all' | 'request' | 'response';
 
@@ -159,20 +172,6 @@ export class SwDashRequests extends LitElement {
         color: var(--accent-error);
       }
 
-      .request-payload {
-        font-size: 11px;
-        color: var(--text-tertiary);
-        background: var(--bg-tertiary);
-        padding: var(--space-2);
-        border-radius: var(--radius-sm);
-        font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
-        white-space: pre-wrap;
-        word-break: break-all;
-        max-height: 150px;
-        overflow-y: auto;
-        margin-top: var(--space-2);
-      }
-
       .request-error {
         font-size: 12px;
         color: var(--accent-error);
@@ -288,22 +287,188 @@ export class SwDashRequests extends LitElement {
         color: var(--text-tertiary);
       }
 
-      .toggle-payload {
-        font-size: 11px;
-        color: var(--accent-primary);
-        cursor: pointer;
-        margin-top: var(--space-1);
-      }
-
-      .toggle-payload:hover {
-        text-decoration: underline;
-      }
-
       .correlation-id {
         font-size: 10px;
         color: var(--text-tertiary);
         font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
       }
+
+      /* Grouped request card */
+      .request-card .request-response-badges {
+        display: flex;
+        gap: var(--space-2);
+        margin-top: var(--space-1);
+      }
+
+      .request-card .status-badge {
+        font-size: 10px;
+        padding: 2px 6px;
+        border-radius: var(--radius-sm);
+      }
+
+      .status-badge.has-request {
+        background: rgba(251, 191, 36, 0.15);
+        color: var(--accent-warning);
+      }
+
+      .status-badge.has-response {
+        background: rgba(99, 102, 241, 0.15);
+        color: var(--accent-primary);
+      }
+
+      .status-badge.pending {
+        background: rgba(156, 163, 175, 0.15);
+        color: var(--text-tertiary);
+      }
+
+      .btn-show-payload {
+        background: var(--bg-tertiary);
+        border: 1px solid var(--border-default);
+        color: var(--accent-primary);
+        font-size: 11px;
+        padding: var(--space-1) var(--space-2);
+        border-radius: var(--radius-sm);
+        cursor: pointer;
+        margin-top: var(--space-2);
+      }
+
+      .btn-show-payload:hover {
+        background: var(--accent-primary);
+        color: white;
+      }
+
+      /* Modal styles */
+      .payload-modal-overlay {
+        position: fixed;
+        top: 0;
+        left: 0;
+        right: 0;
+        bottom: 0;
+        background: rgba(0, 0, 0, 0.8);
+        z-index: 10000;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        padding: var(--space-4);
+      }
+
+      .payload-modal {
+        background: var(--bg-primary);
+        border-radius: var(--radius-lg);
+        border: 1px solid var(--border-default);
+        width: 100%;
+        max-width: 1400px;
+        height: 90vh;
+        display: flex;
+        flex-direction: column;
+        overflow: hidden;
+      }
+
+      .modal-header {
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        padding: var(--space-3) var(--space-4);
+        border-bottom: 1px solid var(--border-default);
+        background: var(--bg-secondary);
+      }
+
+      .modal-title {
+        font-size: 14px;
+        font-weight: 600;
+        color: var(--text-primary);
+        font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
+      }
+
+      .modal-subtitle {
+        font-size: 11px;
+        color: var(--text-tertiary);
+        margin-top: var(--space-1);
+      }
+
+      .modal-close {
+        background: transparent;
+        border: none;
+        color: var(--text-tertiary);
+        font-size: 24px;
+        cursor: pointer;
+        padding: var(--space-1);
+        line-height: 1;
+      }
+
+      .modal-close:hover {
+        color: var(--text-primary);
+      }
+
+      .modal-body {
+        display: grid;
+        grid-template-columns: 1fr 1fr;
+        gap: 1px;
+        flex: 1;
+        overflow: hidden;
+        background: var(--border-default);
+      }
+
+      .payload-panel {
+        background: var(--bg-primary);
+        display: flex;
+        flex-direction: column;
+        overflow: hidden;
+      }
+
+      .payload-panel-header {
+        padding: var(--space-2) var(--space-3);
+        background: var(--bg-secondary);
+        border-bottom: 1px solid var(--border-default);
+        font-size: 12px;
+        font-weight: 600;
+        display: flex;
+        align-items: center;
+        gap: var(--space-2);
+      }
+
+      .payload-panel-header .badge {
+        font-size: 10px;
+      }
+
+      .payload-panel-content {
+        flex: 1;
+        overflow: auto;
+        padding: var(--space-3);
+      }
+
+      .payload-json {
+        font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
+        font-size: 12px;
+        color: var(--text-secondary);
+        white-space: pre-wrap;
+        word-break: break-all;
+        line-height: 1.5;
+      }
+
+      .payload-empty {
+        color: var(--text-tertiary);
+        font-style: italic;
+        font-size: 12px;
+        padding: var(--space-4);
+        text-align: center;
+      }
+
+      .payload-meta {
+        font-size: 11px;
+        color: var(--text-tertiary);
+        padding: var(--space-2) var(--space-3);
+        border-top: 1px solid var(--border-default);
+        background: var(--bg-tertiary);
+      }
+
+      .payload-error {
+        background: rgba(239, 68, 68, 0.1);
+        color: var(--accent-error);
+        padding: var(--space-2) var(--space-3);
+        font-size: 12px;
+        border-bottom: 1px solid rgba(239, 68, 68, 0.2);
+      }
     `
   ];
 
@@ -318,9 +483,12 @@ export class SwDashRequests extends LitElement {
   @state() accessor phaseFilter: TPhaseFilter = 'all';
   @state() accessor methodFilter = '';
   @state() accessor searchText = '';
-  @state() accessor expandedPayloads: Set<string> = new Set();
   @state() accessor isLoadingMore = false;
 
+  // Modal state
+  @state() accessor modalOpen = false;
+  @state() accessor selectedGroup: IGroupedRequest | null = null;
+
   private handleDirectionFilterChange(e: Event): void {
     this.directionFilter = (e.target as HTMLSelectElement).value as TRequestFilter;
     // Local filtering - no HTTP request
@@ -373,14 +541,36 @@ export class SwDashRequests extends LitElement {
     }, 1000);
   }
 
-  private togglePayload(correlationId: string): void {
-    const newSet = new Set(this.expandedPayloads);
-    if (newSet.has(correlationId)) {
-      newSet.delete(correlationId);
-    } else {
-      newSet.add(correlationId);
+  private openPayloadModal(group: IGroupedRequest): void {
+    this.selectedGroup = group;
+    this.modalOpen = true;
+  }
+
+  private closeModal(): void {
+    this.modalOpen = false;
+    this.selectedGroup = null;
+  }
+
+  private handleModalOverlayClick(e: Event): void {
+    if ((e.target as HTMLElement).classList.contains('payload-modal-overlay')) {
+      this.closeModal();
     }
-    this.expandedPayloads = newSet;
+  }
+
+  private handleKeydown = (e: KeyboardEvent): void => {
+    if (e.key === 'Escape' && this.modalOpen) {
+      this.closeModal();
+    }
+  };
+
+  connectedCallback(): void {
+    super.connectedCallback();
+    document.addEventListener('keydown', this.handleKeydown);
+  }
+
+  disconnectedCallback(): void {
+    super.disconnectedCallback();
+    document.removeEventListener('keydown', this.handleKeydown);
   }
 
   private formatTimestamp(ts: number): string {
@@ -440,10 +630,127 @@ export class SwDashRequests extends LitElement {
     return result;
   }
 
-  public render(): TemplateResult {
-    const filteredLogs = this.getFilteredLogs();
+  /**
+   * Group filtered logs by correlationId to show request/response pairs together
+   */
+  private getGroupedLogs(): IGroupedRequest[] {
+    const filtered = this.getFilteredLogs();
+    const groups = new Map<string, IGroupedRequest>();
+
+    for (const log of filtered) {
+      let group = groups.get(log.correlationId);
+
+      if (!group) {
+        group = {
+          correlationId: log.correlationId,
+          method: log.method,
+          timestamp: log.timestamp,
+          hasError: false,
+        };
+        groups.set(log.correlationId, group);
+      }
+
+      if (log.phase === 'request') {
+        group.request = log;
+        // Update timestamp to the earliest (request time)
+        if (log.timestamp < group.timestamp) {
+          group.timestamp = log.timestamp;
+        }
+      } else if (log.phase === 'response') {
+        group.response = log;
+        if (log.durationMs !== undefined) {
+          group.durationMs = log.durationMs;
+        }
+      }
+
+      if (log.error) {
+        group.hasError = true;
+      }
+    }
+
+    // Convert to array and sort by timestamp (newest first)
+    return Array.from(groups.values()).sort((a, b) => b.timestamp - a.timestamp);
+  }
+
+  /**
+   * Render the payload modal
+   */
+  private renderModal(): TemplateResult | null {
+    if (!this.modalOpen || !this.selectedGroup) {
+      return null;
+    }
+
+    const group = this.selectedGroup;
 
     return html`
+      <div class="payload-modal-overlay" @click="${this.handleModalOverlayClick}">
+        <div class="payload-modal">
+          <div class="modal-header">
+            <div>
+              <div class="modal-title">${group.method}</div>
+              <div class="modal-subtitle">
+                Correlation ID: ${group.correlationId}
+                ${group.durationMs !== undefined ? html` | Duration: ${this.formatDuration(group.durationMs)}` : ''}
+              </div>
+            </div>
+            <button class="modal-close" @click="${this.closeModal}">&times;</button>
+          </div>
+          <div class="modal-body">
+            <!-- Request Panel (Left) -->
+            <div class="payload-panel">
+              <div class="payload-panel-header">
+                <span class="badge phase-request">REQUEST</span>
+                ${group.request ? html`
+                  <span class="badge direction-${group.request.direction}">${group.request.direction}</span>
+                ` : ''}
+              </div>
+              ${group.request ? html`
+                <div class="payload-meta">
+                  Timestamp: ${this.formatTimestamp(group.request.timestamp)}
+                </div>
+                <div class="payload-panel-content">
+                  <pre class="payload-json">${JSON.stringify(group.request.payload, null, 2)}</pre>
+                </div>
+              ` : html`
+                <div class="payload-empty">No request data captured</div>
+              `}
+            </div>
+
+            <!-- Response Panel (Right) -->
+            <div class="payload-panel">
+              <div class="payload-panel-header">
+                <span class="badge phase-response">RESPONSE</span>
+                ${group.response ? html`
+                  <span class="badge direction-${group.response.direction}">${group.response.direction}</span>
+                ` : ''}
+              </div>
+              ${group.response?.error ? html`
+                <div class="payload-error">Error: ${group.response.error}</div>
+              ` : ''}
+              ${group.response ? html`
+                <div class="payload-meta">
+                  Timestamp: ${this.formatTimestamp(group.response.timestamp)}
+                  ${group.response.durationMs !== undefined ? html` | Duration: ${this.formatDuration(group.response.durationMs)}` : ''}
+                </div>
+                <div class="payload-panel-content">
+                  <pre class="payload-json">${JSON.stringify(group.response.payload, null, 2)}</pre>
+                </div>
+              ` : html`
+                <div class="payload-empty">No response yet (pending)</div>
+              `}
+            </div>
+          </div>
+        </div>
+      </div>
+    `;
+  }
+
+  public render(): TemplateResult {
+    const groupedLogs = this.getGroupedLogs();
+
+    return html`
+      ${this.renderModal()}
+
       <!-- Stats Bar -->
       <div class="stats-bar">
         <div class="stat-item">
@@ -463,7 +770,7 @@ export class SwDashRequests extends LitElement {
           <span class="stat-label">Avg Duration</span>
         </div>
         <div class="stat-item">
-          <span class="stat-value">${filteredLogs.length}</span>
+          <span class="stat-value">${groupedLogs.length}</span>
           <span class="stat-label">Showing</span>
         </div>
       </div>
@@ -523,46 +830,51 @@ export class SwDashRequests extends LitElement {
         <button class="btn clear-btn" @click="${this.handleClear}">Clear Logs</button>
       </div>
 
-      <!-- Request List -->
+      <!-- Request List (Grouped by correlationId) -->
       ${this.logs.length === 0 ? html`
         <div class="empty-state">No request logs found. Traffic will appear here as TypedRequests are made.</div>
-      ` : filteredLogs.length === 0 ? html`
+      ` : groupedLogs.length === 0 ? html`
         <div class="empty-state">No logs match filter</div>
       ` : html`
         <div class="requests-list">
-          ${filteredLogs.map(log => html`
-            <div class="request-card ${log.error ? 'has-error' : ''}">
+          ${groupedLogs.map(group => html`
+            <div class="request-card ${group.hasError ? 'has-error' : ''}">
               <div class="request-header">
                 <div>
                   <div class="request-badges">
-                    <span class="badge direction-${log.direction}">${log.direction}</span>
-                    <span class="badge phase-${log.phase}">${log.phase}</span>
-                    ${log.error ? html`<span class="badge error">error</span>` : ''}
+                    ${group.request ? html`
+                      <span class="badge direction-${group.request.direction}">${group.request.direction}</span>
+                    ` : ''}
+                    ${group.hasError ? html`<span class="badge error">error</span>` : ''}
+                  </div>
+                  <div class="method-name">${group.method}</div>
+                  <div class="correlation-id">${group.correlationId}</div>
+                  <div class="request-response-badges">
+                    <span class="status-badge ${group.request ? 'has-request' : 'pending'}">
+                      ${group.request ? 'REQ' : 'REQ pending'}
+                    </span>
+                    <span class="status-badge ${group.response ? 'has-response' : 'pending'}">
+                      ${group.response ? 'RES' : 'RES pending'}
+                    </span>
                   </div>
-                  <div class="method-name">${log.method}</div>
-                  <div class="correlation-id">${log.correlationId}</div>
                 </div>
                 <div class="request-meta">
-                  <span class="request-time">${this.formatTimestamp(log.timestamp)}</span>
-                  ${log.durationMs !== undefined ? html`
-                    <span class="request-duration ${this.getDurationClass(log.durationMs)}">
-                      ${this.formatDuration(log.durationMs)}
+                  <span class="request-time">${this.formatTimestamp(group.timestamp)}</span>
+                  ${group.durationMs !== undefined ? html`
+                    <span class="request-duration ${this.getDurationClass(group.durationMs)}">
+                      ${this.formatDuration(group.durationMs)}
                     </span>
                   ` : ''}
                 </div>
               </div>
 
-              ${log.error ? html`
-                <div class="request-error">${log.error}</div>
+              ${group.response?.error ? html`
+                <div class="request-error">${group.response.error}</div>
               ` : ''}
 
-              <div class="toggle-payload" @click="${() => this.togglePayload(log.correlationId)}">
-                ${this.expandedPayloads.has(log.correlationId) ? 'Hide payload' : 'Show payload'}
-              </div>
-
-              ${this.expandedPayloads.has(log.correlationId) ? html`
-                <div class="request-payload">${JSON.stringify(log.payload, null, 2)}</div>
-              ` : ''}
+              <button class="btn-show-payload" @click="${() => this.openPayloadModal(group)}">
+                Show Payload
+              </button>
             </div>
           `)}
         </div>