fix: Simplify error messages in monitor display

2 files changed, 50 insertions, 3 deletions

diff --git a/internal/server/server.go b/internal/server/server.go
index 50ff1ea..c033059 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -12,6 +12,7 @@ import (
 	"net/http"
 	"sort"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/Fuwn/kaze/internal/config"
@@ -556,6 +557,54 @@ func templateFuncs() template.FuncMap {
 			}
 			return "bg-neutral-200 dark:bg-neutral-800"
 		},
+		"simplifyError": func(err string) string {
+			if err == "" {
+				return ""
+			}
+			// Common error patterns to simplify
+			switch {
+			case strings.Contains(err, "no such host"):
+				return "DNS lookup failed"
+			case strings.Contains(err, "connection refused"):
+				return "Connection refused"
+			case strings.Contains(err, "connection reset"):
+				return "Connection reset"
+			case strings.Contains(err, "timeout"):
+				return "Timeout"
+			case strings.Contains(err, "certificate"):
+				return "SSL/TLS error"
+			case strings.Contains(err, "EOF"):
+				return "Connection closed"
+			case strings.Contains(err, "status code"):
+				// Extract status code if present
+				if idx := strings.Index(err, "status code"); idx != -1 {
+					rest := err[idx:]
+					// Try to find the number
+					for i, c := range rest {
+						if c >= '0' && c <= '9' {
+							end := i
+							for end < len(rest) && rest[end] >= '0' && rest[end] <= '9' {
+								end++
+							}
+							return "HTTP " + rest[i:end]
+						}
+					}
+				}
+				return "Unexpected status"
+			case strings.Contains(err, "expected content"):
+				return "Content mismatch"
+			case strings.Contains(err, "i/o timeout"):
+				return "I/O timeout"
+			case strings.Contains(err, "network is unreachable"):
+				return "Network unreachable"
+			default:
+				// Truncate long errors
+				if len(err) > 30 {
+					return err[:27] + "..."
+				}
+				return err
+			}
+		},
 		"tickTooltipData": func(tick *storage.TickData, mode, timezone string, hidePing bool) string {
 			if tick == nil {
 				data := map[string]interface{}{"header": "No data"}
diff --git a/internal/server/templates/index.html b/internal/server/templates/index.html
index 6b28edb..eb3fc41 100644
--- a/internal/server/templates/index.html
+++ b/internal/server/templates/index.html
@@ -99,9 +99,7 @@
                                     {{if gt .SSLDaysLeft 0}}
                                     <span class="{{if lt .SSLDaysLeft 14}}text-yellow-600 dark:text-yellow-400{{else if lt .SSLDaysLeft 7}}text-red-600 dark:text-red-400{{end}}" data-tooltip='{{.SSLTooltip}}'>SSL: {{.SSLDaysLeft}}d</span>
                                     {{end}}
-                                    {{if .LastError}}
-                                    {{if .LastError}}<span class="text-red-600 dark:text-red-400 truncate max-w-[200px]" data-tooltip='{"header":"Last Error","error":"{{.LastError}}"}'>{{.LastError}}</span>{{end}}
-                                    {{end}}
+                                    {{if .LastError}}<span class="text-red-600 dark:text-red-400 truncate max-w-[200px]" data-tooltip='{"header":"Last Error","error":"{{.LastError}}"}'>{{simplifyError .LastError}}</span>{{end}}
                                 </div>
                             </div>
                             <div class="flex items-center gap-2 flex-shrink-0">