Add custom logo URL configuration option

Bug: https://github.com/happyDomain/happydeliver/issues/6

internal/config/cli.go

@@ -41,6 +41,7 @@ func declareFlags(o *Config) {
 	flag.DurationVar(&o.ReportRetention, "report-retention", o.ReportRetention, "How long to keep reports (e.g., 720h, 30d). 0 = keep forever")
 	flag.UintVar(&o.RateLimit, "rate-limit", o.RateLimit, "API rate limit (requests per second per IP)")
 	flag.Var(&URL{&o.SurveyURL}, "survey-url", "URL for user feedback survey")
+	flag.StringVar(&o.CustomLogoURL, "custom-logo-url", o.CustomLogoURL, "URL for custom logo image in the web UI")
 
 	// Others flags are declared in some other files likes sources, storages, ... when they need specials configurations
 }

internal/config/config.go

@@ -44,6 +44,7 @@ type Config struct {
 	ReportRetention time.Duration // How long to keep reports. 0 = keep forever
 	RateLimit       uint          // API rate limit (requests per second per IP)
 	SurveyURL       url.URL       // URL for user feedback survey
+	CustomLogoURL   string        // URL for custom logo image in the web UI
 }
 
 // DatabaseConfig contains database connection settings

web/routes.go

@@ -66,6 +66,10 @@ func DeclareRoutes(cfg *config.Config, router *gin.Engine) {
 		appConfig["rbls"] = cfg.Analysis.RBLs
 	}
 
+	if cfg.CustomLogoURL != "" {
+		appConfig["custom_logo_url"] = cfg.CustomLogoURL
+	}
+
 	if appcfg, err := json.MarshalIndent(appConfig, "", "  "); err != nil {
 		log.Println("Unable to generate JSON config to inject in web application")
 	} else {

web/src/lib/stores/config.ts

@@ -24,6 +24,7 @@ import { writable } from "svelte/store";
 interface AppConfig {
     report_retention?: number;
     survey_url?: string;
+    custom_logo_url?: string;
 }
 
 const defaultConfig: AppConfig = {

web/src/routes/+layout.svelte

@@ -6,6 +6,7 @@
     import favicon from "$lib/assets/favicon.svg";
 
     import Logo from "$lib/components/Logo.svelte";
+    import { appConfig } from "$lib/stores/config";
     import { theme } from "$lib/stores/theme";
     import { onMount } from "svelte";
 
@@ -32,8 +33,12 @@
     <nav class="navbar navbar-expand-lg navbar-light shadow-sm">
         <div class="container">
             <a class="navbar-brand fw-bold" href="/">
-                <i class="bi bi-envelope-check me-2"></i>
-                <Logo color={$theme === "light" ? "black" : "white"} />
+                {#if $appConfig.custom_logo_url}
+                    <img src={$appConfig.custom_logo_url} alt="Logo" style="height: 25px;" />
+                {:else}
+                    <i class="bi bi-envelope-check me-2"></i>
+                    <Logo color={$theme === "light" ? "black" : "white"} />
+                {/if}
             </a>
             <div>
                 <span class="d-none d-md-inline navbar-text text-primary small">