Enhance session restoration and add user file viewer endpoint

go_cloud/internal/http/routes.go

@@ -81,6 +81,10 @@ func NewRouter(cfg *config.Config, db *database.DB, jwtManager *jwt.Manager, aut
 		r.Get("/user/files", func(w http.ResponseWriter, req *http.Request) {
 			userFilesHandler(w, req, db)
 		})
+		// User file viewer
+		r.Get("/user/files/{fileId}/view", func(w http.ResponseWriter, req *http.Request) {
+			userViewerHandler(w, req, db, auditLogger)
+		})
 		// Download user file
 		r.Get("/user/files/download", func(w http.ResponseWriter, req *http.Request) {
 			downloadUserFileHandler(w, req, db, storageClient)
@@ -382,6 +386,42 @@ func viewerHandler(w http.ResponseWriter, r *http.Request, db *database.DB, audi
 	json.NewEncoder(w).Encode(session)
 }
 
+// userViewerHandler serves a viewer session for personal workspace files
+func userViewerHandler(w http.ResponseWriter, r *http.Request, db *database.DB, auditLogger *audit.Logger) {
+	userIDStr, _ := middleware.GetUserID(r.Context())
+	userID, _ := uuid.Parse(userIDStr)
+	fileId := chi.URLParam(r, "fileId")
+
+	// For now, return a synthetic viewer session similar to org viewer
+	session := struct {
+		ViewUrl      string `json:"viewUrl"`
+		Capabilities struct {
+			CanEdit     bool `json:"canEdit"`
+			CanAnnotate bool `json:"canAnnotate"`
+			IsPdf       bool `json:"isPdf"`
+		} `json:"capabilities"`
+		ExpiresAt string `json:"expiresAt"`
+	}{
+		ViewUrl: "https://view.example.com/" + fileId,
+		Capabilities: struct {
+			CanEdit     bool `json:"canEdit"`
+			CanAnnotate bool `json:"canAnnotate"`
+			IsPdf       bool `json:"isPdf"`
+		}{
+			CanEdit:     false,
+			CanAnnotate: true,
+			IsPdf:       strings.HasSuffix(strings.ToLower(fileId), ".pdf"),
+		},
+		ExpiresAt: time.Now().Add(15 * time.Minute).UTC().Format(time.RFC3339),
+	}
+
+	// Optionally log activity without org id
+	db.LogActivity(r.Context(), userID, uuid.Nil, &fileId, "view_user_file", map[string]interface{}{})
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(session)
+}
+
 func editorHandler(w http.ResponseWriter, r *http.Request, db *database.DB, auditLogger *audit.Logger) {
 	userIDStr, _ := middleware.GetUserID(r.Context())
 	userID, _ := uuid.Parse(userIDStr)