update

.idea/.gitignore

@@ -0,0 +1,10 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# 依赖于环境的 Maven 主目录路径
+/mavenHomeManager.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/fred-api.iml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="jbr-21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/fred-api.iml" filepath="$PROJECT_DIR$/.idea/fred-api.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

handlers/fred.go

@@ -43,25 +43,141 @@ func (h *FREDHandler) buildURL(endpoint string, params map[string]string) string
 	return u.String()
 }
 
-func (h *FREDHandler) fetchData(url string, target interface{}) error {
+func (h *FREDHandler) fetchData(target interface{}, c *gin.Context, endpoint string, params map[string]string) {
+	url := h.buildURL(endpoint, params)
+
 	resp, err := http.Get(url)
 	if err != nil {
-		return err
+		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
+			ErrorCode:    "NetworkError",
+			ErrorMessage: err.Error(),
+		})
+		return
 	}
 	defer resp.Body.Close()
 
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return err
+		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
+			ErrorCode:    "ReadError",
+			ErrorMessage: err.Error(),
+		})
+		return
 	}
 
 	if resp.StatusCode != http.StatusOK {
 		var errResp models.ErrorResponse
 		json.Unmarshal(body, &errResp)
-		return fmt.Errorf("API error: %s - %s", errResp.ErrorCode, errResp.ErrorMessage)
+		c.JSON(http.StatusBadGateway, models.ErrorResponse{
+			ErrorCode:    "APIError",
+			ErrorMessage: fmt.Sprintf("Status: %d, Error: %s - %s", resp.StatusCode, errResp.ErrorCode, errResp.ErrorMessage),
+		})
+		return
 	}
 
-	return json.Unmarshal(body, target)
+	if err := json.Unmarshal(body, target); err != nil {
+		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
+			ErrorCode:    "ParseError",
+			ErrorMessage: err.Error(),
+		})
+		return
+	}
+
+	c.JSON(http.StatusOK, target)
+}
+
+func (h *FREDHandler) HealthCheck(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{
+		"status":  "healthy",
+		"service": "FRED API",
+	})
+}
+
+func (h *FREDHandler) GetCategory(c *gin.Context) {
+	categoryID := c.Query("category_id")
+	if categoryID == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "category_id is required",
+		})
+		return
+	}
+	h.fetchData(&models.CategoryResponse{}, c, "/category", map[string]string{"category_id": categoryID})
+}
+
+func (h *FREDHandler) GetCategoryChildren(c *gin.Context) {
+	categoryID := c.Query("category_id")
+	if categoryID == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "category_id is required",
+		})
+		return
+	}
+	params := map[string]string{"category_id": categoryID}
+	h.fetchData(&models.CategoriesResponse{}, c, "/category/children", params)
+}
+
+func (h *FREDHandler) GetCategoryRelated(c *gin.Context) {
+	categoryID := c.Query("category_id")
+	if categoryID == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "category_id is required",
+		})
+		return
+	}
+	h.fetchData(&models.RelatedTagsResponse{}, c, "/category/related", map[string]string{"category_id": categoryID})
+}
+
+func (h *FREDHandler) GetCategorySeries(c *gin.Context) {
+	categoryID := c.Query("category_id")
+	if categoryID == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "category_id is required",
+		})
+		return
+	}
+	params := map[string]string{"category_id": categoryID}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order"})
+	h.fetchData(&models.CategorySeriesResponse{}, c, "/category/series", params)
+}
+
+func (h *FREDHandler) GetCategoryTags(c *gin.Context) {
+	categoryID := c.Query("category_id")
+	if categoryID == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "category_id is required",
+		})
+		return
+	}
+	params := map[string]string{"category_id": categoryID}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order"})
+	h.fetchData(&models.CategoryTagsResponse{}, c, "/category/tags", params)
+}
+
+func (h *FREDHandler) GetCategoryRelatedTags(c *gin.Context) {
+	categoryID := c.Query("category_id")
+	if categoryID == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "category_id is required",
+		})
+		return
+	}
+	tagNames := c.Query("tag_names")
+	if tagNames == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "tag_names is required",
+		})
+		return
+	}
+	params := map[string]string{"category_id": categoryID, "tag_names": tagNames}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order"})
+	h.fetchData(&models.RelatedTagsResponse{}, c, "/category/related_tags", params)
 }
 
 func (h *FREDHandler) GetSeries(c *gin.Context) {
@@ -73,30 +189,23 @@ func (h *FREDHandler) GetSeries(c *gin.Context) {
 		})
 		return
 	}
-
+	params := map[string]string{"series_id": seriesID}
-	params := map[string]string{
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end"})
-		"series_id": seriesID,
+	h.fetchData(&models.SeriesResponse{}, c, "/series", params)
 }
 
-	if realtimeStart := c.Query("realtime_start"); realtimeStart != "" {
+func (h *FREDHandler) GetSeriesCategories(c *gin.Context) {
-		params["realtime_start"] = realtimeStart
+	seriesID := c.Query("series_id")
-	}
+	if seriesID == "" {
-	if realtimeEnd := c.Query("realtime_end"); realtimeEnd != "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
-		params["realtime_end"] = realtimeEnd
+			ErrorCode:    "BadRequest",
-	}
+			ErrorMessage: "series_id is required",
-
-	url := h.buildURL("/series", params)
-
-	var response models.SeriesListResponse
-	if err := h.fetchData(url, &response); err != nil {
-		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
-			ErrorCode:    "InternalError",
-			ErrorMessage: err.Error(),
 		})
 		return
 	}
-
+	params := map[string]string{"series_id": seriesID}
-	c.JSON(http.StatusOK, response)
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end"})
+	h.fetchData(&models.SeriesCategoriesResponse{}, c, "/series/categories", params)
 }
 
 func (h *FREDHandler) GetObservations(c *gin.Context) {
@@ -108,35 +217,27 @@ func (h *FREDHandler) GetObservations(c *gin.Context) {
 		})
 		return
 	}
-
+	params := map[string]string{"series_id": seriesID}
-	params := map[string]string{
+	h.addOptionalParams(c, params, []string{
-		"series_id": seriesID,
-	}
-
-	optionalParams := []string{
 		"realtime_start", "realtime_end", "limit", "offset", "sort_order",
 		"observation_start", "observation_end", "units", "frequency",
 		"aggregation_method", "output_type", "vintage_dates",
+	})
+	h.fetchData(&models.ObservationsResponse{}, c, "/series/observations", params)
 }
 
-	for _, param := range optionalParams {
+func (h *FREDHandler) GetSeriesRelease(c *gin.Context) {
-		if v := c.Query(param); v != "" {
+	seriesID := c.Query("series_id")
-			params[param] = v
+	if seriesID == "" {
-		}
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
-	}
+			ErrorCode:    "BadRequest",
-
+			ErrorMessage: "series_id is required",
-	url := h.buildURL("/series/observations", params)
-
-	var response models.ObservationsResponse
-	if err := h.fetchData(url, &response); err != nil {
-		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
-			ErrorCode:    "InternalError",
-			ErrorMessage: err.Error(),
 		})
 		return
 	}
-
+	params := map[string]string{"series_id": seriesID}
-	c.JSON(http.StatusOK, response)
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end"})
+	h.fetchData(&models.ReleaseResponse{}, c, "/series/release", params)
 }
 
 func (h *FREDHandler) SearchSeries(c *gin.Context) {
@@ -148,90 +249,135 @@ func (h *FREDHandler) SearchSeries(c *gin.Context) {
 		})
 		return
 	}
-
+	params := map[string]string{"search_text": searchText}
-	params := map[string]string{
+	h.addOptionalParams(c, params, []string{
-		"search_text": searchText,
-	}
-
-	optionalParams := []string{
 		"realtime_start", "realtime_end", "limit", "offset", "sort_order",
-		"observation_start", "observation_end", "units", "frequency",
+		"order_by", "filter", "" +
-		"aggregation_method", "output_type",
+			"" +
+			"" +
+			"" +
+			"" +
+			"",
+	})
+	h.fetchData(&models.SearchResponse{}, c, "/series/search", params)
 }
 
-	for _, param := range optionalParams {
+func (h *FREDHandler) SearchSeriesTags(c *gin.Context) {
-		if v := c.Query(param); v != "" {
+	searchText := c.Query("search_text")
-			params[param] = v
+	if searchText == "" {
-		}
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
-	}
+			ErrorCode:    "BadRequest",
-
+			ErrorMessage: "search_text is required",
-	url := h.buildURL("/series/search", params)
-
-	var response models.SearchResponse
-	if err := h.fetchData(url, &response); err != nil {
-		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
-			ErrorCode:    "InternalServerError",
-			ErrorMessage: err.Error(),
 		})
 		return
 	}
+	params := map[string]string{"search_text": searchText}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order"})
+	h.fetchData(&models.TagsResponse{}, c, "/series/search/tags", params)
+}
 
-	c.JSON(http.StatusOK, response)
+func (h *FREDHandler) SearchSeriesRelatedTags(c *gin.Context) {
+	searchText := c.Query("search_text")
+	if searchText == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "search_text is required",
+		})
+		return
+	}
+	tagNames := c.Query("tag_names")
+	if tagNames == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "tag_names is required",
+		})
+		return
+	}
+	params := map[string]string{"search_text": searchText, "tag_names": tagNames}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order"})
+	h.fetchData(&models.RelatedTagsResponse{}, c, "/series/search/related_tags", params)
+}
+
+func (h *FREDHandler) GetSeriesTags(c *gin.Context) {
+	seriesID := c.Query("series_id")
+	if seriesID == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "series_id is required",
+		})
+		return
+	}
+	params := map[string]string{"series_id": seriesID}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order"})
+	h.fetchData(&models.SeriesTagsResponse{}, c, "/series/tags", params)
+}
+
+func (h *FREDHandler) GetSeriesUpdates(c *gin.Context) {
+	params := map[string]string{}
+	h.addOptionalParams(c, params, []string{
+		"realtime_start", "realtime_end", "limit", "offset", "sort_order",
+		"filter", "observation_start", "observation_end",
+	})
+	h.fetchData(&models.SeriesUpdatesResponse{}, c, "/series/updates", params)
+}
+
+func (h *FREDHandler) GetSeriesVintageDates(c *gin.Context) {
+	seriesID := c.Query("series_id")
+	if seriesID == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "series_id is required",
+		})
+		return
+	}
+	params := map[string]string{"series_id": seriesID}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end"})
+	h.fetchData(&models.VintageDatesResponse{}, c, "/series/vintagedates", params)
 }
 
 func (h *FREDHandler) GetReleases(c *gin.Context) {
 	params := map[string]string{}
-
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "sort_order"})
-	optionalParams := []string{
+	h.fetchData(&models.ReleasesResponse{}, c, "/releases", params)
-		"realtime_start", "realtime_end", "limit", "offset", "sort_order",
-	}
-
-	for _, param := range optionalParams {
-		if v := c.Query(param); v != "" {
-			params[param] = v
-		}
-	}
-
-	url := h.buildURL("/releases", params)
-
-	var response models.ReleasesResponse
-	if err := h.fetchData(url, &response); err != nil {
-		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
-			ErrorCode:    "InternalServerError",
-			ErrorMessage: err.Error(),
-		})
-		return
-	}
-
-	c.JSON(http.StatusOK, response)
 }
 
 func (h *FREDHandler) GetReleaseDates(c *gin.Context) {
 	params := map[string]string{}
-
+	h.addOptionalParams(c, params, []string{
-	optionalParams := []string{
 		"realtime_start", "realtime_end", "limit", "offset", "sort_order",
 		"release_id", "date", "start_date", "end_date",
+	})
+	h.fetchData(&models.ReleaseDatesResponse{}, c, "/releases/dates", params)
 }
 
-	for _, param := range optionalParams {
+func (h *FREDHandler) GetRelease(c *gin.Context) {
-		if v := c.Query(param); v != "" {
+	releaseIDStr := c.Query("release_id")
-			params[param] = v
+	if releaseIDStr == "" {
-		}
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
-	}
+			ErrorCode:    "BadRequest",
-
+			ErrorMessage: "release_id is required",
-	url := h.buildURL("/releases/dates", params)
-
-	var response models.ReleaseDatesResponse
-	if err := h.fetchData(url, &response); err != nil {
-		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
-			ErrorCode:    "InternalServerError",
-			ErrorMessage: err.Error(),
 		})
 		return
 	}
+	releaseID, _ := strconv.Atoi(releaseIDStr)
+	params := map[string]string{"release_id": strconv.Itoa(releaseID)}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end"})
+	h.fetchData(&models.ReleaseResponse{}, c, "/release", params)
+}
 
-	c.JSON(http.StatusOK, response)
+func (h *FREDHandler) GetReleaseDates2(c *gin.Context) {
+	releaseIDStr := c.Query("release_id")
+	if releaseIDStr == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "release_id is required",
+		})
+		return
+	}
+	releaseID, _ := strconv.Atoi(releaseIDStr)
+	params := map[string]string{"release_id": strconv.Itoa(releaseID)}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "sort_order", "date", "start_date", "end_date"})
+	h.fetchData(&models.ReleaseDatesResponse{}, c, "/release/dates", params)
 }
 
 func (h *FREDHandler) GetReleaseSeries(c *gin.Context) {
@@ -243,49 +389,171 @@ func (h *FREDHandler) GetReleaseSeries(c *gin.Context) {
 		})
 		return
 	}
+	releaseID, _ := strconv.Atoi(releaseIDStr)
+	params := map[string]string{"release_id": strconv.Itoa(releaseID)}
+	h.addOptionalParams(c, params, []string{
+		"realtime_start", "realtime_end", "limit", "offset", "sort_order",
+		"order_by", "filter", "observation_start", "observation_end", "units", "frequency",
+		"aggregation_method", "output_type",
+	})
+	h.fetchData(&models.SearchResponse{}, c, "/release/series", params)
+}
 
-	releaseID, err := strconv.Atoi(releaseIDStr)
+func (h *FREDHandler) GetReleaseSources(c *gin.Context) {
-	if err != nil {
+	releaseIDStr := c.Query("release_id")
+	if releaseIDStr == "" {
 		c.JSON(http.StatusBadRequest, models.ErrorResponse{
 			ErrorCode:    "BadRequest",
-			ErrorMessage: "release_id must be a number",
+			ErrorMessage: "release_id is required",
 		})
 		return
 	}
-
+	releaseID, _ := strconv.Atoi(releaseIDStr)
-	params := map[string]string{
+	params := map[string]string{"release_id": strconv.Itoa(releaseID)}
-		"release_id": strings.TrimSpace(strings.Replace(strconv.Itoa(releaseID), " ", "", -1)),
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end"})
+	h.fetchData(&models.ReleaseSourcesResponse{}, c, "/release/sources", params)
 }
 
-	optionalParams := []string{
+func (h *FREDHandler) GetReleaseTags(c *gin.Context) {
-		"realtime_start", "realtime_end", "limit", "offset", "sort_order",
+	releaseIDStr := c.Query("release_id")
-		"observation_start", "observation_end", "units", "frequency",
+	if releaseIDStr == "" {
-		"aggregation_method", "output_type",
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "release_id is required",
+		})
+		return
+	}
+	releaseID, _ := strconv.Atoi(releaseIDStr)
+	params := map[string]string{"release_id": strconv.Itoa(releaseID)}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order"})
+	h.fetchData(&models.ReleaseTagsResponse{}, c, "/release/tags", params)
 }
 
-	for _, param := range optionalParams {
+func (h *FREDHandler) GetReleaseRelatedTags(c *gin.Context) {
+	releaseIDStr := c.Query("release_id")
+	if releaseIDStr == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "release_id is required",
+		})
+		return
+	}
+	tagNames := c.Query("tag_names")
+	if tagNames == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "tag_names is required",
+		})
+		return
+	}
+	releaseID, _ := strconv.Atoi(releaseIDStr)
+	params := map[string]string{"release_id": strconv.Itoa(releaseID), "tag_names": tagNames}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order"})
+	h.fetchData(&models.RelatedTagsResponse{}, c, "/release/related_tags", params)
+}
+
+func (h *FREDHandler) GetReleaseTables(c *gin.Context) {
+	releaseIDStr := c.Query("release_id")
+	if releaseIDStr == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "release_id is required",
+		})
+		return
+	}
+	releaseID, _ := strconv.Atoi(releaseIDStr)
+	params := map[string]string{"release_id": strconv.Itoa(releaseID)}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end"})
+	h.fetchData(&models.ReleaseTablesResponse{}, c, "/release/tables", params)
+}
+
+func (h *FREDHandler) GetSources(c *gin.Context) {
+	params := map[string]string{}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "sort_order"})
+	h.fetchData(&models.SourcesResponse{}, c, "/sources", params)
+}
+
+func (h *FREDHandler) GetSource(c *gin.Context) {
+	sourceIDStr := c.Query("source_id")
+	if sourceIDStr == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "source_id is required",
+		})
+		return
+	}
+	sourceID, _ := strconv.Atoi(sourceIDStr)
+	params := map[string]string{"source_id": strconv.Itoa(sourceID)}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end"})
+	h.fetchData(&models.SourceResponse{}, c, "/source", params)
+}
+
+func (h *FREDHandler) GetSourceReleases(c *gin.Context) {
+	sourceIDStr := c.Query("source_id")
+	if sourceIDStr == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "source_id is required",
+		})
+		return
+	}
+	sourceID, _ := strconv.Atoi(sourceIDStr)
+	params := map[string]string{"source_id": strconv.Itoa(sourceID)}
+	h.addOptionalParams(c, params, []string{"realtime_start", "realtime_end", "limit", "offset", "sort_order"})
+	h.fetchData(&models.ReleasesResponse{}, c, "/source/releases", params)
+}
+
+func (h *FREDHandler) GetTags(c *gin.Context) {
+	params := map[string]string{}
+	h.addOptionalParams(c, params, []string{
+		"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order",
+		"tag_name", "tag_group_id", "filter",
+	})
+	h.fetchData(&models.TagsResponse{}, c, "/tags", params)
+}
+
+func (h *FREDHandler) GetRelatedTags(c *gin.Context) {
+	tagNames := c.Query("tag_names")
+	if tagNames == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "tag_names is required",
+		})
+		return
+	}
+	params := map[string]string{"tag_names": tagNames}
+	h.addOptionalParams(c, params, []string{
+		"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order",
+	})
+	h.fetchData(&models.RelatedTagsResponse{}, c, "/related_tags", params)
+}
+
+func (h *FREDHandler) GetTagsSeries(c *gin.Context) {
+	tagNames := c.Query("tag_names")
+	if tagNames == "" {
+		c.JSON(http.StatusBadRequest, models.ErrorResponse{
+			ErrorCode:    "BadRequest",
+			ErrorMessage: "tag_names is required",
+		})
+		return
+	}
+	params := map[string]string{"tag_names": tagNames}
+	h.addOptionalParams(c, params, []string{
+		"realtime_start", "realtime_end", "limit", "offset", "order_by", "sort_order",
+		"filter", "" +
+			"" +
+			"" +
+			"" +
+			"" +
+			"",
+	})
+	h.fetchData(&models.SearchResponse{}, c, "/tags/series", params)
+}
+
+func (h *FREDHandler) addOptionalParams(c *gin.Context, params map[string]string, optionals []string) {
+	for _, param := range optionals {
 		if v := c.Query(param); v != "" {
-			params[param] = v
+			params[param] = strings.TrimSpace(v)
 		}
 	}
-
-	url := h.buildURL("/release/series", params)
-
-	var response models.SearchResponse
-	if err := h.fetchData(url, &response); err != nil {
-		c.JSON(http.StatusInternalServerError, models.ErrorResponse{
-			ErrorCode:    "InternalServerError",
-			ErrorMessage: err.Error(),
-		})
-		return
-	}
-
-	c.JSON(http.StatusOK, response)
-}
-
-func (h *FREDHandler) HealthCheck(c *gin.Context) {
-	c.JSON(http.StatusOK, gin.H{
-		"status":  "healthy",
-		"service": "FRED API Proxy",
-	})
 }

main.go

@@ -41,25 +41,67 @@ func main() {
 
 	api := router.Group("/api/v1")
 	{
+		api.GET("/category", fredHandler.GetCategory)
+		api.GET("/category/children", fredHandler.GetCategoryChildren)
+		api.GET("/category/related", fredHandler.GetCategoryRelated)
+		api.GET("/category/series", fredHandler.GetCategorySeries)
+		api.GET("/category/tags", fredHandler.GetCategoryTags)
+		api.GET("/category/related_tags", fredHandler.GetCategoryRelatedTags)
+
 		api.GET("/series", fredHandler.GetSeries)
+		api.GET("/series/categories", fredHandler.GetSeriesCategories)
 		api.GET("/series/observations", fredHandler.GetObservations)
+		api.GET("/series/release", fredHandler.GetSeriesRelease)
 		api.GET("/series/search", fredHandler.SearchSeries)
+		api.GET("/series/search/tags", fredHandler.SearchSeriesTags)
+		api.GET("/series/search/related_tags", fredHandler.SearchSeriesRelatedTags)
+		api.GET("/series/tags", fredHandler.GetSeriesTags)
+		api.GET("/series/updates", fredHandler.GetSeriesUpdates)
+		api.GET("/series/vintagedates", fredHandler.GetSeriesVintageDates)
+
 		api.GET("/releases", fredHandler.GetReleases)
 		api.GET("/releases/dates", fredHandler.GetReleaseDates)
+		api.GET("/release", fredHandler.GetRelease)
+		api.GET("/release/dates", fredHandler.GetReleaseDates2)
 		api.GET("/release/series", fredHandler.GetReleaseSeries)
+		api.GET("/release/sources", fredHandler.GetReleaseSources)
+		api.GET("/release/tags", fredHandler.GetReleaseTags)
+		api.GET("/release/related_tags", fredHandler.GetReleaseRelatedTags)
+		api.GET("/release/tables", fredHandler.GetReleaseTables)
+
+		api.GET("/sources", fredHandler.GetSources)
+		api.GET("/source", fredHandler.GetSource)
+		api.GET("/source/releases", fredHandler.GetSourceReleases)
+
+		api.GET("/tags", fredHandler.GetTags)
+		api.GET("/related_tags", fredHandler.GetRelatedTags)
+		api.GET("/tags/series", fredHandler.GetTagsSeries)
 	}
 
+	router.Static("/static", "./web/static")
+	router.LoadHTMLGlob("web/templates/*")
+
+	router.GET("/", func(c *gin.Context) {
+		c.HTML(200, "index.html", gin.H{
+			"title": "FRED Economic Data Dashboard",
+		})
+	})
+
 	go func() {
 		fmt.Printf("FRED API Server starting on :%s\n", cfg.ServerPort)
 		fmt.Printf("FRED API Base URL: %s\n", cfg.FREDBaseURL)
 		fmt.Println("\nAvailable endpoints:")
 		fmt.Println("  GET /health              - Health check")
+		fmt.Println("  GET /                    - Web Dashboard")
 		fmt.Println("  GET /api/v1/series                    - Get series info")
 		fmt.Println("  GET /api/v1/series/observations       - Get observations")
 		fmt.Println("  GET /api/v1/series/search             - Search series")
 		fmt.Println("  GET /api/v1/releases                  - Get all releases")
 		fmt.Println("  GET /api/v1/releases/dates            - Get release dates")
 		fmt.Println("  GET /api/v1/release/series            - Get series in release")
+		fmt.Println("  GET /api/v1/category                  - Get category")
+		fmt.Println("  GET /api/v1/sources                   - Get sources")
+		fmt.Println("  GET /api/v1/tags                      - Get tags")
 		fmt.Println("")
 		fmt.Println("Examples:")
 		fmt.Println("  curl 'http://localhost:" + cfg.ServerPort + "/api/v1/series?series_id=GNPCA'")

models/models.go

@@ -1,5 +1,25 @@
 package models
 
+type Category struct {
+	ID       int    `json:"id"`
+	Name     string `json:"name"`
+	ParentID int    `json:"parent_id"`
+	Level    int    `json:"level"`
+	Notes    string `json:"notes,omitempty"`
+}
+
+type CategoryResponse struct {
+	RealtimeStart string    `json:"realtime_start"`
+	RealtimeEnd   string    `json:"realtime_end"`
+	Category      *Category `json:"category"`
+}
+
+type CategoriesResponse struct {
+	RealtimeStart string     `json:"realtime_start"`
+	RealtimeEnd   string     `json:"realtime_end"`
+	Categories    []Category `json:"categories"`
+}
+
 type Series struct {
 	ID                      string `json:"id"`
 	RealtimeStart           string `json:"realtime_start"`
@@ -24,6 +44,12 @@ type SeriesListResponse struct {
 	Seriess       []Series `json:"seriess"`
 }
 
+type SeriesResponse struct {
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Series        Series `json:"series"`
+}
+
 type Observation struct {
 	RealtimeStart string `json:"realtime_start"`
 	RealtimeEnd   string `json:"realtime_end"`
@@ -53,7 +79,14 @@ type SearchResult struct {
 	RealtimeEnd             string `json:"realtime_end"`
 	Title                   string `json:"title"`
 	Frequency               string `json:"frequency"`
+	FrequencyShort          string `json:"frequency_short"`
 	Units                   string `json:"units"`
+	UnitsShort              string `json:"units_short"`
+	SeasonalAdjustment      string `json:"seasonal_adjustment"`
+	SeasonalAdjustmentShort string `json:"seasonal_adjustment_short"`
+	LastUpdated             string `json:"last_updated"`
+	Popularity              int    `json:"popularity"`
+	Notes                   string `json:"notes,omitempty"`
 }
 
 type SearchResponse struct {
@@ -86,6 +119,12 @@ type ReleasesResponse struct {
 	Releases      []Release `json:"releases"`
 }
 
+type ReleaseResponse struct {
+	RealtimeStart string  `json:"realtime_start"`
+	RealtimeEnd   string  `json:"realtime_end"`
+	Release       Release `json:"release"`
+}
+
 type ReleaseDatesResponse struct {
 	RealtimeStart string `json:"realtime_start"`
 	RealtimeEnd   string `json:"realtime_end"`
@@ -99,6 +138,130 @@ type ReleaseDatesResponse struct {
 	} `json:"release_dates"`
 }
 
+type Source struct {
+	ID            int    `json:"id"`
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Name          string `json:"name"`
+	Link          string `json:"link"`
+	Notes         string `json:"notes,omitempty"`
+}
+
+type SourcesResponse struct {
+	RealtimeStart string   `json:"realtime_start"`
+	RealtimeEnd   string   `json:"realtime_end"`
+	Count         int      `json:"count"`
+	Offset        int      `json:"offset"`
+	Limit         int      `json:"limit"`
+	Sources       []Source `json:"sources"`
+}
+
+type SourceResponse struct {
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Source        Source `json:"source"`
+}
+
+type Tag struct {
+	Name       string `json:"name"`
+	GroupName  string `json:"group_name"`
+	Serverity  string `json:"serverity"`
+	Notes      string `json:"notes,omitempty"`
+	Popularity int    `json:"popularity"`
+}
+
+type TagsResponse struct {
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Count         int    `json:"count"`
+	Offset        int    `json:"offset"`
+	Limit         int    `json:"limit"`
+	Tags          []Tag  `json:"tags"`
+}
+
+type RelatedTagsResponse struct {
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Count         int    `json:"count"`
+	Offset        int    `json:"offset"`
+	Limit         int    `json:"limit"`
+	RelatedTags   []Tag  `json:"related_tags"`
+}
+
+type SeriesUpdate struct {
+	ID            string `json:"id"`
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Title         string `json:"title"`
+	Frequency     string `json:"frequency"`
+	Units         string `json:"units"`
+	LastUpdated   string `json:"last_updated"`
+}
+
+type SeriesUpdatesResponse struct {
+	RealtimeStart string         `json:"realtime_start"`
+	RealtimeEnd   string         `json:"realtime_end"`
+	Count         int            `json:"count"`
+	Offset        int            `json:"offset"`
+	Limit         int            `json:"limit"`
+	Observations  []SeriesUpdate `json:"seriess"`
+}
+
+type VintageDatesResponse struct {
+	VintageDates []string `json:"vintage_dates"`
+}
+
+type CategorySeriesResponse struct {
+	RealtimeStart string   `json:"realtime_start"`
+	RealtimeEnd   string   `json:"realtime_end"`
+	Series        []Series `json:"seriess"`
+}
+
+type CategoryTagsResponse struct {
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Tags          []Tag  `json:"tags"`
+}
+
+type SeriesTagsResponse struct {
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Tags          []Tag  `json:"tags"`
+}
+
+type SeriesCategoriesResponse struct {
+	RealtimeStart string     `json:"realtime_start"`
+	RealtimeEnd   string     `json:"realtime_end"`
+	Categories    []Category `json:"categories"`
+}
+
+type ReleaseSourcesResponse struct {
+	RealtimeStart string   `json:"realtime_start"`
+	RealtimeEnd   string   `json:"realtime_end"`
+	Sources       []Source `json:"sources"`
+}
+
+type ReleaseTagsResponse struct {
+	RealtimeStart string `json:"realtime_start"`
+	RealtimeEnd   string `json:"realtime_end"`
+	Tags          []Tag  `json:"tags"`
+}
+
+type ReleaseTablesResponse struct {
+	Result struct {
+		Data []struct {
+			SeriesID    string `json:"series_id"`
+			Title       string `json:"title"`
+			StartDate   string `json:"start_date"`
+			EndDate     string `json:"end_date"`
+			LastUpdated string `json:"last_updated"`
+			Frequency   string `json:"frequency"`
+			Units       string `json:"units"`
+			SeasonalAdj string `json:"seasonal_adjustment"`
+		} `json:"data"`
+	} `json:"result"`
+}
+
 type ErrorResponse struct {
 	ErrorCode    string `json:"error_code"`
 	ErrorMessage string `json:"error_message"`

web/static/css/style.css

@@ -0,0 +1,137 @@
+:root {
+    --primary-color: #1a73e8;
+    --secondary-color: #5f6368;
+    --success-color: #34a853;
+    --danger-color: #ea4335;
+    --warning-color: #fbbc04;
+    --info-color: #4285f4;
+    --dark-bg: #202124;
+    --light-bg: #f8f9fa;
+}
+
+body {
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+    background-color: #f5f5f5;
+}
+
+.navbar {
+    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+}
+
+.card {
+    border-radius: 8px;
+    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
+    transition: box-shadow 0.3s ease;
+}
+
+.card:hover {
+    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
+}
+
+.card-header {
+    border-radius: 8px 8px 0 0 !important;
+}
+
+#chart-placeholder {
+    display: none;
+}
+
+#dataChart {
+    display: none;
+}
+
+#dataChart.active {
+    display: block;
+}
+
+.table {
+    font-size: 0.9rem;
+}
+
+.table th {
+    position: sticky;
+    top: 0;
+    z-index: 1;
+}
+
+.pagination {
+    margin: 0;
+}
+
+.spinner-border-sm {
+    width: 1rem;
+    height: 1rem;
+    border-width: 0.15em;
+}
+
+.series-item {
+    padding: 8px 12px;
+    cursor: pointer;
+    border-radius: 4px;
+    transition: background-color 0.2s;
+}
+
+.series-item:hover {
+    background-color: #e8f0fe;
+}
+
+.series-item.active {
+    background-color: #1a73e8;
+    color: white;
+}
+
+.category-item {
+    padding: 6px 10px;
+    cursor: pointer;
+    font-size: 0.9rem;
+    border-radius: 4px;
+    transition: all 0.2s;
+}
+
+.category-item:hover {
+    background-color: #e8f5e9;
+}
+
+.release-item {
+    padding: 8px;
+    border-bottom: 1px solid #eee;
+    cursor: pointer;
+}
+
+.release-item:hover {
+    background-color: #f8f9fa;
+}
+
+.release-item:last-child {
+    border-bottom: none;
+}
+
+.release-date {
+    font-size: 0.8rem;
+    color: #666;
+}
+
+#current-time {
+    font-family: monospace;
+    font-size: 0.9rem;
+}
+
+.btn-outline-light:hover {
+    background-color: rgba(255,255,255,0.2);
+}
+
+footer {
+    margin-top: 2rem;
+}
+
+.form-control:focus, .form-select:focus {
+    border-color: #1a73e8;
+    box-shadow: 0 0 0 0.2rem rgba(26, 115, 232, 0.25);
+}
+
+.toast-container {
+    position: fixed;
+    bottom: 20px;
+    right: 20px;
+    z-index: 1050;
+}

web/static/js/app.js

@@ -0,0 +1,385 @@
+const API_BASE = '/api/v1';
+let chart = null;
+let currentSeriesData = [];
+let currentPage = 1;
+const itemsPerPage = 20;
+
+const popularSeries = ['GNPCA', 'GDP', 'UNRATE', 'CPIAUCSL', 'FEDFUNDS', 'M2SL', 'SP500', 'EXUSEU'];
+
+function init() {
+    updateTime();
+    setInterval(updateTime, 1000);
+    loadPopularSeries();
+    loadCategories();
+    loadReleases();
+    initChart();
+}
+
+function updateTime() {
+    const now = new Date();
+    document.getElementById('current-time').textContent = now.toLocaleString();
+}
+
+function initChart() {
+    const ctx = document.getElementById('dataChart').getContext('2d');
+    chart = new Chart(ctx, {
+        type: 'line',
+        data: {
+            labels: [],
+            datasets: [{
+                label: 'Value',
+                data: [],
+                borderColor: '#1a73e8',
+                backgroundColor: 'rgba(26, 115, 232, 0.1)',
+                fill: true,
+                tension: 0.3,
+                pointRadius: 3,
+                pointHoverRadius: 6
+            }]
+        },
+        options: {
+            responsive: true,
+            maintainAspectRatio: false,
+            plugins: {
+                legend: {
+                    display: true,
+                    position: 'top'
+                },
+                tooltip: {
+                    mode: 'index',
+                    intersect: false
+                }
+            },
+            scales: {
+                x: {
+                    ticks: {
+                        maxRotation: 45,
+                        minRotation: 45
+                    }
+                },
+                y: {
+                    beginAtZero: false
+                }
+            },
+            interaction: {
+                mode: 'nearest',
+                axis: 'x',
+                intersect: false
+            }
+        }
+    });
+}
+
+async function searchSeries() {
+    const searchText = document.getElementById('search-input').value.trim();
+    if (!searchText) {
+        alert('Please enter a search term');
+        return;
+    }
+
+    try {
+        const response = await axios.get(`${API_BASE}/series/search`, {
+            params: { search_text: searchText, limit: 20 }
+        });
+        
+        if (response.data && response.data.seriess && response.data.seriess.length > 0) {
+            displaySearchResults(response.data.seriess);
+        } else {
+            alert('No results found');
+        }
+    } catch (error) {
+        console.error('Search error:', error);
+        alert('Search failed: ' + (error.response?.data?.error_message || error.message));
+    }
+}
+
+function displaySearchResults(results) {
+    const select = document.getElementById('series-select');
+    select.innerHTML = '<option value="">-- Search Results --</option>';
+    
+    results.forEach(series => {
+        const option = document.createElement('option');
+        option.value = series.id;
+        option.textContent = `${series.id} - ${series.title}`;
+        select.appendChild(option);
+    });
+    
+    if (results.length > 0) {
+        select.value = results[0].id;
+        loadSeriesData();
+    }
+}
+
+async function loadPopularSeries() {
+    const select = document.getElementById('series-select');
+    select.innerHTML = '<option value="">-- Popular Series --</option>';
+    
+    popularSeries.forEach(seriesId => {
+        const option = document.createElement('option');
+        option.value = seriesId;
+        option.textContent = seriesId;
+        select.appendChild(option);
+    });
+    
+    if (popularSeries.length > 0) {
+        select.value = popularSeries[0];
+        loadSeriesData();
+    }
+}
+
+async function loadSeriesData() {
+    const seriesId = document.getElementById('series-select').value;
+    if (!seriesId) {
+        document.getElementById('chart-placeholder').style.display = 'block';
+        document.getElementById('dataChart').style.display = 'none';
+        return;
+    }
+
+    try {
+        const [seriesRes, obsRes] = await Promise.all([
+            axios.get(`${API_BASE}/series`, { params: { series_id: seriesId } }),
+            axios.get(`${API_BASE}/series/observations`, { params: { series_id: seriesId, limit: 1000 } })
+        ]);
+
+        const series = seriesRes.data.series;
+        const observations = obsRes.data.observations || [];
+
+        displaySeriesInfo(series);
+        displayChart(observations, seriesId);
+        currentSeriesData = observations;
+        renderTable(1);
+        updatePagination();
+        
+        document.getElementById('chart-placeholder').style.display = 'none';
+        document.getElementById('dataChart').style.display = 'block';
+    } catch (error) {
+        console.error('Load series error:', error);
+        alert('Failed to load series: ' + (error.response?.data?.error_message || error.message));
+    }
+}
+
+function displaySeriesInfo(series) {
+    const info = document.getElementById('series-info');
+    info.innerHTML = `
+        <div class="row">
+            <div class="col-md-6">
+                <p><strong>Series ID:</strong> ${series.id}</p>
+                <p><strong>Title:</strong> ${series.title}</p>
+                <p><strong>Frequency:</strong> ${series.frequency}</p>
+            </div>
+            <div class="col-md-6">
+                <p><strong>Units:</strong> ${series.units}</p>
+                <p><strong>Seasonal Adjustment:</strong> ${series.seasonal_adjustment}</p>
+                <p><strong>Last Updated:</strong> ${series.last_updated}</p>
+            </div>
+        </div>
+        ${series.notes ? `<p class="mt-2"><strong>Notes:</strong> ${series.notes}</p>` : ''}
+    `;
+    document.getElementById('chart-title').textContent = series.title || series.id;
+}
+
+function displayChart(observations, seriesId) {
+    const labels = observations.map(o => o.date).reverse();
+    const data = observations.map(o => parseFloat(o.value) || null).reverse();
+    
+    chart.data.labels = labels;
+    chart.data.datasets[0].data = data;
+    chart.data.datasets[0].label = seriesId;
+    chart.update();
+}
+
+function renderTable(page) {
+    currentPage = page;
+    const start = (page - 1) * itemsPerPage;
+    const end = start + itemsPerPage;
+    const pageData = currentSeriesData.slice(start, end);
+    
+    const tbody = document.getElementById('data-table-body');
+    if (pageData.length === 0) {
+        tbody.innerHTML = '<tr><td colspan="2" class="text-center text-muted">No data available</td></tr>';
+        return;
+    }
+    
+    tbody.innerHTML = pageData.map(obs => `
+        <tr>
+            <td>${obs.date}</td>
+            <td>${obs.value || 'N/A'}</td>
+        </tr>
+    `).join('');
+}
+
+function updatePagination() {
+    const totalPages = Math.ceil(currentSeriesData.length / itemsPerPage);
+    const pagination = document.getElementById('pagination');
+    
+    if (totalPages <= 1) {
+        pagination.innerHTML = '';
+        return;
+    }
+    
+    let html = '';
+    
+    if (currentPage > 1) {
+        html += `<li class="page-item"><a class="page-link" href="#" onclick="renderTable(${currentPage - 1})">Prev</a></li>`;
+    }
+    
+    for (let i = 1; i <= totalPages; i++) {
+        if (i === currentPage) {
+            html += `<li class="page-item active"><a class="page-link" href="#">${i}</a></li>`;
+        } else if (i === 1 || i === totalPages || (i >= currentPage - 2 && i <= currentPage + 2)) {
+            html += `<li class="page-item"><a class="page-link" href="#" onclick="renderTable(${i})">${i}</a></li>`;
+        } else if (i === currentPage - 3 || i === currentPage + 3) {
+            html += `<li class="page-item disabled"><span class="page-link">...</span></li>`;
+        }
+    }
+    
+    if (currentPage < totalPages) {
+        html += `<li class="page-item"><a class="page-link" href="#" onclick="renderTable(${currentPage + 1})">Next</a></li>`;
+    }
+    
+    pagination.innerHTML = html;
+}
+
+async function loadCategories() {
+    try {
+        const response = await axios.get(`${API_BASE}/category/children`, {
+            params: { category_id: 0 }
+        });
+        
+        const list = document.getElementById('categories-list');
+        if (response.data && response.data.categories) {
+            list.innerHTML = response.data.categories.map(cat => `
+                <div class="category-item" onclick="loadCategorySeries(${cat.id}, '${cat.name}')">
+                    ${cat.name}
+                </div>
+            `).join('');
+        }
+    } catch (error) {
+        console.error('Load categories error:', error);
+    }
+}
+
+async function loadCategorySeries(categoryId, categoryName) {
+    try {
+        const response = await axios.get(`${API_BASE}/category/series`, {
+            params: { category_id: categoryId, limit: 10 }
+        });
+        
+        const select = document.getElementById('series-select');
+        select.innerHTML = `<option value="">-- ${categoryName} --</option>`;
+        
+        if (response.data && response.data.seriess) {
+            response.data.seriess.forEach(series => {
+                const option = document.createElement('option');
+                option.value = series.id;
+                option.textContent = `${series.id} - ${series.title}`;
+                select.appendChild(option);
+            });
+            
+            if (response.data.seriess.length > 0) {
+                select.value = response.data.seriess[0].id;
+                loadSeriesData();
+            }
+        }
+    } catch (error) {
+        console.error('Load category series error:', error);
+    }
+}
+
+async function loadReleases() {
+    try {
+        const response = await axios.get(`${API_BASE}/releases/dates`, {
+            params: { limit: 10, start_date: getDateDaysAgo(30) }
+        });
+        
+        const list = document.getElementById('releases-list');
+        if (response.data && response.data.release_dates) {
+            list.innerHTML = response.data.release_dates.map(rel => `
+                <div class="release-item" onclick="loadReleaseSeries(${rel.release_id}, '${rel.release_name}')">
+                    <div class="fw-bold">${rel.release_name}</div>
+                    <div class="release-date">${rel.date}</div>
+                </div>
+            `).join('');
+        }
+    } catch (error) {
+        console.error('Load releases error:', error);
+    }
+}
+
+async function loadReleaseSeries(releaseId, releaseName) {
+    try {
+        const response = await axios.get(`${API_BASE}/release/series`, {
+            params: { release_id: releaseId, limit: 10 }
+        });
+        
+        const select = document.getElementById('series-select');
+        select.innerHTML = `<option value="">-- ${releaseName} --</option>`;
+        
+        if (response.data && response.data.seriess) {
+            response.data.seriess.forEach(series => {
+                const option = document.createElement('option');
+                option.value = series.id;
+                option.textContent = `${series.id} - ${series.title}`;
+                select.appendChild(option);
+            });
+            
+            if (response.data.seriess.length > 0) {
+                select.value = response.data.seriess[0].id;
+                loadSeriesData();
+            }
+        }
+    } catch (error) {
+        console.error('Load release series error:', error);
+    }
+}
+
+function showSeriesModal() {
+    const modal = new bootstrap.Modal(document.getElementById('addSeriesModal'));
+    modal.show();
+}
+
+function addSeriesFromModal() {
+    const seriesId = document.getElementById('modal-series-id').value.trim();
+    if (!seriesId) {
+        alert('Please enter a series ID');
+        return;
+    }
+    
+    document.getElementById('series-select').value = seriesId;
+    bootstrap.Modal.getInstance(document.getElementById('addSeriesModal')).hide();
+    loadSeriesData();
+}
+
+function exportData() {
+    if (!currentSeriesData.length) {
+        alert('No data to export');
+        return;
+    }
+    
+    let csv = 'Date,Value\n';
+    currentSeriesData.forEach(obs => {
+        csv += `${obs.date},${obs.value}\n`;
+    });
+    
+    const blob = new Blob([csv], { type: 'text/csv' });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = `fred_data_${new Date().toISOString().split('T')[0]}.csv`;
+    a.click();
+    URL.revokeObjectURL(url);
+}
+
+function getDateDaysAgo(days) {
+    const date = new Date();
+    date.setDate(date.getDate() - days);
+    return date.toISOString().split('T')[0];
+}
+
+document.addEventListener('DOMContentLoaded', init);
+
+document.getElementById('search-input').addEventListener('keypress', function(e) {
+    if (e.key === 'Enter') {
+        searchSeries();
+    }
+});

web/templates/index.html

@@ -0,0 +1,183 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>FRED Economic Data Dashboard</title>
+    <link rel="stylesheet" href="/static/css/style.css">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.0/font/bootstrap-icons.css">
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
+</head>
+<body>
+    <nav class="navbar navbar-dark bg-dark">
+        <div class="container-fluid">
+            <a class="navbar-brand" href="/">
+                <i class="bi bi-graph-up-arrow me-2"></i>
+                FRED Economic Data Dashboard
+            </a>
+            <span class="navbar-text text-light" id="current-time"></span>
+        </div>
+    </nav>
+
+    <div class="container-fluid mt-4">
+        <div class="row">
+            <div class="col-md-3">
+                <div class="card mb-4">
+                    <div class="card-header bg-primary text-white">
+                        <h5 class="mb-0"><i class="bi bi-search me-2"></i>Search</h5>
+                    </div>
+                    <div class="card-body">
+                        <div class="input-group mb-3">
+                            <input type="text" class="form-control" id="search-input" placeholder="Search series (e.g., GDP)">
+                            <button class="btn btn-primary" onclick="searchSeries()">
+                                <i class="bi bi-search"></i>
+                            </button>
+                        </div>
+                        <div class="d-grid gap-2">
+                            <button class="btn btn-outline-secondary" onclick="loadPopularSeries()">
+                                <i class="bi bi-star me-2"></i>Popular Series
+                            </button>
+                        </div>
+                    </div>
+                </div>
+
+                <div class="card mb-4">
+                    <div class="card-header bg-success text-white">
+                        <h5 class="mb-0"><i class="bi bi-collection me-2"></i>Categories</h5>
+                    </div>
+                    <div class="card-body" id="categories-list" style="max-height: 300px; overflow-y: auto;">
+                        <div class="text-center text-muted">
+                            <div class="spinner-border spinner-border-sm" role="status"></div>
+                            <span class="ms-2">Loading...</span>
+                        </div>
+                    </div>
+                </div>
+
+                <div class="card mb-4">
+                    <div class="card-header bg-info text-white">
+                        <h5 class="mb-0"><i class="bi bi-newspaper me-2"></i>Recent Releases</h5>
+                    </div>
+                    <div class="card-body" id="releases-list" style="max-height: 300px; overflow-y: auto;">
+                        <div class="text-center text-muted">
+                            <div class="spinner-border spinner-border-sm" role="status"></div>
+                            <span class="ms-2">Loading...</span>
+                        </div>
+                    </div>
+                </div>
+            </div>
+
+            <div class="col-md-9">
+                <div class="card mb-4">
+                    <div class="card-header bg-dark text-white d-flex justify-content-between align-items-center">
+                        <h5 class="mb-0" id="chart-title">Select a series to view data</h5>
+                        <div>
+                            <button class="btn btn-sm btn-outline-light" onclick="exportData()" title="Export Data">
+                                <i class="bi bi-download"></i>
+                            </button>
+                        </div>
+                    </div>
+                    <div class="card-body">
+                        <div id="series-selector" class="mb-3">
+                            <div class="row">
+                                <div class="col-md-8">
+                                    <select class="form-select" id="series-select" onchange="loadSeriesData()">
+                                        <option value="">-- Select a Series --</option>
+                                    </select>
+                                </div>
+                                <div class="col-md-4">
+                                    <button class="btn btn-primary w-100" onclick="showSeriesModal()">
+                                        <i class="bi bi-plus-circle me-2"></i>Add Series
+                                    </button>
+                                </div>
+                            </div>
+                        </div>
+                        <div style="height: 400px;">
+                            <canvas id="dataChart"></canvas>
+                        </div>
+                        <div id="chart-placeholder" class="text-center text-muted py-5">
+                            <i class="bi bi-graph-up" style="font-size: 4rem;"></i>
+                            <p class="mt-3">Select or search for a series to visualize data</p>
+                        </div>
+                    </div>
+                </div>
+
+                <div class="card mb-4">
+                    <div class="card-header bg-secondary text-white">
+                        <h5 class="mb-0"><i class="bi bi-table me-2"></i>Data Table</h5>
+                    </div>
+                    <div class="card-body">
+                        <div class="table-responsive" style="max-height: 400px; overflow-y: auto;">
+                            <table class="table table-striped table-hover" id="data-table">
+                                <thead class="table-dark">
+                                    <tr>
+                                        <th>Date</th>
+                                        <th>Value</th>
+                                    </tr>
+                                </thead>
+                                <tbody id="data-table-body">
+                                    <tr>
+                                        <td colspan="2" class="text-center text-muted">No data available</td>
+                                    </tr>
+                                </tbody>
+                            </table>
+                        </div>
+                        <div class="mt-3">
+                            <nav>
+                                <ul class="pagination justify-content-center" id="pagination"></ul>
+                            </nav>
+                        </div>
+                    </div>
+                </div>
+
+                <div class="card">
+                    <div class="card-header bg-warning text-dark">
+                        <h5 class="mb-0"><i class="bi bi-info-circle me-2"></i>Series Information</h5>
+                    </div>
+                    <div class="card-body" id="series-info">
+                        <p class="text-muted">Select a series to view details</p>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <div class="modal fade" id="addSeriesModal" tabindex="-1">
+        <div class="modal-dialog">
+            <div class="modal-content">
+                <div class="modal-header">
+                    <h5 class="modal-title">Add Series</h5>
+                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+                </div>
+                <div class="modal-body">
+                    <div class="mb-3">
+                        <label class="form-label">Series ID</label>
+                        <input type="text" class="form-control" id="modal-series-id" placeholder="e.g., GNPCA, GDP">
+                    </div>
+                    <div class="mb-3">
+                        <label class="form-label">Observation Limit</label>
+                        <select class="form-select" id="modal-limit">
+                            <option value="10">Last 10</option>
+                            <option value="50" selected>Last 50</option>
+                            <option value="100">Last 100</option>
+                            <option value="1000">All</option>
+                        </select>
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
+                    <button type="button" class="btn btn-primary" onclick="addSeriesFromModal()">Load</button>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <footer class="bg-dark text-white text-center py-3 mt-4">
+        <p class="mb-0">FRED Economic Data Dashboard | Data provided by Federal Reserve Bank of St. Louis</p>
+    </footer>
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
+    <script src="/static/js/app.js"></script>
+</body>
+</html>