feat(17-01): wire ChatMainContent with real discussion view (GREEN)

- Replace ChatMainContent() stub with ChatMainContent(data DiscussionTabData)
- Renders .ui-card container with .message-own/.message-other rows and .message-bubble
- Update GetChatPage handler to pass views.NewDiscussionTabData()
- Run templ generate; TestChatMainContentRendersBubbleClasses passes
- Full go test ./... -count=1 exits 0

go-backend/internal/web/handlers/auth.go

@@ -128,7 +128,7 @@ func (h *AuthHandler) GetPlanningPage() http.HandlerFunc {
 
 func (h *AuthHandler) GetChatPage() http.HandlerFunc {
 	return h.renderAppPage("/chat", func(user PublicUser) templ.Component {
-		return views.ChatMainContent()
+		return views.ChatMainContent(views.NewDiscussionTabData())
 	})
 }
 

go-backend/internal/web/views/dashboard_components.templ

@@ -163,8 +163,36 @@ templ PlanningMainContent() {
 	@AppSectionMainContent("Planning", "Visualisez le rythme de l'équipe, les jalons à venir et les arbitrages de charge.")
 }
 
-templ ChatMainContent() {
+templ ChatMainContent(data DiscussionTabData) {
-	@AppSectionMainContent("Discussions", "Retrouvez les conversations importantes, les décisions récentes et les échanges à relancer.")
+	<div id="discussion-messages" class="ui-card">
+		if len(data.Messages) == 0 {
+			@ui.EmptyState(ui.EmptyStateProps{
+				Title:       "No messages yet",
+				Description: "Start the discussion.",
+				Icon:        ui.UIIcon("message-circle"),
+			})
+		} else {
+			for _, msg := range data.Messages {
+				if msg.IsOwn {
+					<div class="message-row message-own">
+						<div class="message-meta">
+							<span class="message-author">{ msg.Author }</span>
+							<span>{ msg.Timestamp }</span>
+						</div>
+						<div class="message-bubble">{ msg.Body }</div>
+					</div>
+				} else {
+					<div class="message-row message-other">
+						<div class="message-meta">
+							<span class="message-author">{ msg.Author }</span>
+							<span>{ msg.Timestamp }</span>
+						</div>
+						<div class="message-bubble">{ msg.Body }</div>
+					</div>
+				}
+			}
+		}
+	</div>
 }
 
 templ FilesMainContent() {