feat: display deployment status badge on READY task cards

Add deployment_status field to task list/get API responses for READY
tasks. The field includes deployed_commit, fix_commits, and includes_fix
so the UI can show whether the deployed server includes each fix.

- internal/api/task_view.go: taskView struct + enrichTask() helper
- handleListTasks/handleGetTask: return enriched taskView responses
- web/app.js: export renderDeploymentBadge(); add badge to READY cards
- web/test/deployment-badge.test.mjs: 8 tests for renderDeploymentBadge
- web/style.css: .deployment-badge--deployed / --pending styles
- server_test.go: 3 new tests (red→green) for enriched task responses

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/internal/api/server.go b/internal/api/server.go
index 8a20349..800ad3e 100644
--- a/internal/api/server.go
+++ b/internal/api/server.go
@@ -514,7 +514,11 @@ func (s *Server) handleListTasks(w http.ResponseWriter, r *http.Request) {
 	if tasks == nil {
 		tasks = []*task.Task{}
 	}
-	writeJSON(w, http.StatusOK, tasks)
+	views := make([]*taskView, len(tasks))
+	for i, tk := range tasks {
+		views[i] = s.enrichTask(tk)
+	}
+	writeJSON(w, http.StatusOK, views)
 }
 
 func (s *Server) handleGetTask(w http.ResponseWriter, r *http.Request) {
@@ -524,7 +528,7 @@ func (s *Server) handleGetTask(w http.ResponseWriter, r *http.Request) {
 		writeJSON(w, http.StatusNotFound, map[string]string{"error": "task not found"})
 		return
 	}
-	writeJSON(w, http.StatusOK, t)
+	writeJSON(w, http.StatusOK, s.enrichTask(t))
 }
 func (s *Server) handleRunTask(w http.ResponseWriter, r *http.Request) {
 	id := r.PathValue("id")