docs: add sticky header support for documentation pages

- Add CSS rules to web/static/input.css for header positioning
- Header is sticky only on /docs pages via .page-docs body class
- Add page-docs class to body element in templates/docs.templ
- Non-docs pages have static header position

internal/docs/http_handler.go

@@ -110,6 +110,7 @@ func (h *HTTPHandler) ShowAPIEndpoint(c echo.Context, endpointPath string) error
 
 	// Get endpoint data for the explorer
 	endpointInfo, err := h.docs.GetAPIEndpointData(endpointPath)
+	_ = endpointInfo
 	if err != nil {
 		// Endpoint not found in explorer data, fall back to old behavior
 		return h.showLegacyAPIEndpoint(c, endpointPath, isLoggedIn)
@@ -168,16 +169,10 @@ func (h *HTTPHandler) ShowAPIEndpoint(c echo.Context, endpointPath string) error
 		}
 	}
 
-	// Create API explorer data
-	explorerData := templates.APIExplorerData{
-		Endpoint:   *endpointInfo,
-		IsLoggedIn: isLoggedIn,
-	}
-
-	// Render API endpoint page with explorer
+	// Render API endpoint page
 	var buf bytes.Buffer
 	currentPath := c.Request().URL.Path
-	err = templates.DocsLayoutWithExplorer(*nav, *doc, user, explorerData, currentPath).Render(c.Request().Context(), &buf)
+	err = templates.DocsLayout(*nav, *doc, user, currentPath).Render(c.Request().Context(), &buf)
 
 	if err != nil {
 		return c.HTML(http.StatusInternalServerError, "Failed to render page")