feat(ui): add desktop footer, legal custom link and about dialog

.env.example

@@ -86,6 +86,9 @@ LEGAL_PRIVACY_CONTENT=
 # Pfad im Container, z. B. /legal/impressum.md
 LEGAL_IMPRINT_CONTENT_FILE=
 LEGAL_PRIVACY_CONTENT_FILE=
+# Eigener Link im Footer (nur https://)
+LEGAL_CUSTOM_LINK_LABEL=
+LEGAL_CUSTOM_LINK_URL=
 
 # ─── Bilder und Audio in Notizen ───────────────────────────────────────────────────────────────────
 # Dateien liegen in data/media/ und sind nur für Personen sichtbar, die die Notiz lesen dürfen. Nicht mehr

CHANGELOG.md

@@ -6,6 +6,10 @@ Das Format folgt [Keep a Changelog](https://keepachangelog.com/de/1.1.0/), die V
 
 ## [Unreleased]
 
+### Added
+- Globaler Desktop-App-Footer mit Versionsnummer, „Über MindSift“, dynamischen Rechtstexten (Impressum, Datenschutz) sowie optional konfigurierbarem Custom-Link (`LEGAL_CUSTOM_LINK_LABEL`, `LEGAL_CUSTOM_LINK_URL`).
+- „Über MindSift“-Dialog und Versionsanzeige im mobilen Profil-Menü (Avatar-Menü oben rechts).
+
 ## [0.10.0] - 2026-10-30
 
 ### Added

Doku/architecture.md

@@ -82,6 +82,7 @@ Das Frontend liegt per `go:embed` im Binary ([cmd/server/main.go](../cmd/server/
 | `LEGAL_IMPRINT_URL`, `LEGAL_PRIVACY_URL` | leer | Impressum/Datenschutz als externer Link (nur `http(s)`) |
 | `LEGAL_IMPRINT_CONTENT`, `LEGAL_PRIVACY_CONTENT` | leer | Impressum/Datenschutz als Markdown, angezeigt in einem Lesefenster |
 | `LEGAL_IMPRINT_CONTENT_FILE`, `LEGAL_PRIVACY_CONTENT_FILE` | leer | Pfad zu einer Datei im Container mit Markdown-Inhalt für Impressum bzw. Datenschutz. Ohne URL und Text bleibt der Link unsichtbar. |
+| `LEGAL_CUSTOM_LINK_LABEL`, `LEGAL_CUSTOM_LINK_URL` | leer | Eigener Link im globalen Desktop-Footer (nur `https://`, sonst ignoriert) |
 
 Hinweis: `DATABASE_URL` mit `postgres…` führt dazu, dass der Standardpfad in `DATA_DIR` genutzt wird; Postgres ist nicht implementiert.
 

docker-compose.yml

@@ -40,6 +40,9 @@ services:
       - LEGAL_PRIVACY_CONTENT=${LEGAL_PRIVACY_CONTENT:-}
       - LEGAL_IMPRINT_CONTENT_FILE=${LEGAL_IMPRINT_CONTENT_FILE:-}
       - LEGAL_PRIVACY_CONTENT_FILE=${LEGAL_PRIVACY_CONTENT_FILE:-}
+      # Eigener Link im Footer (nur https://)
+      # - LEGAL_CUSTOM_LINK_LABEL=${LEGAL_CUSTOM_LINK_LABEL:-}
+      # - LEGAL_CUSTOM_LINK_URL=${LEGAL_CUSTOM_LINK_URL:-}
       # Bilder und Audio in Notizen
       - MEDIA_MAX_IMAGE_MB=${MEDIA_MAX_IMAGE_MB:-15}
       - MEDIA_MAX_AUDIO_MB=${MEDIA_MAX_AUDIO_MB:-50}

frontend/src/App.tsx

@@ -65,6 +65,8 @@ import { useMobileActions } from './context/MobileActionContext';
 import { MobileHeaderMenu } from './components/MobileHeaderMenu';
 import { UserAvatar } from './components/UserAvatar';
 import { CommandPalette } from './components/CommandPalette';
+import { AppFooter } from './components/AppFooter';
+import { AboutModal } from './components/AboutModal';
 import { APP_VERSION } from './version';
 
 type ActiveTab =
@@ -170,6 +172,7 @@ export const App: React.FC = () => {
 
   // Profile Dropdown State
   const [showProfileMenu, setShowProfileMenu] = useState(false);
+  const [showAbout, setShowAbout] = useState(false);
   const dropdownRef = useRef<HTMLDivElement | null>(null);
 
   // Mobile Navigation & Quick-Action State
@@ -1119,8 +1122,8 @@ export const App: React.FC = () => {
       {/* Main Container */}
       {/* The workspace fills the window exactly and scrolls only inside the note, never the page */}
       <main
-        className={`flex-1 max-w-6xl w-full mx-auto px-3 sm:px-4 pt-3 pb-24 sm:pb-6 ${
-          activeTab === 'workspace' ? 'min-h-0 flex flex-col' : ''
+        className={`flex-1 max-w-6xl w-full mx-auto px-3 sm:px-4 pt-3 pb-24 ${
+          activeTab === 'workspace' ? 'min-h-0 flex flex-col sm:pb-0' : 'sm:pb-6'
         }`}
       >
         <ViewErrorBoundary onReset={() => setActiveTab('triage')}>
@@ -1202,6 +1205,11 @@ export const App: React.FC = () => {
         </ViewErrorBoundary>
       </main>
 
+      <AppFooter
+        legal={authStatus.legal}
+        onOpenAbout={() => setShowAbout(true)}
+      />
+
       {/* MOBILE BOTTOM NAVIGATION BAR (5 equal columns -> + FAB is dead-center) */}
       <nav className="sm:hidden fixed bottom-0 left-0 right-0 z-40 bg-panel/95 backdrop-blur-md border-t border-border px-2 pt-1.5 pb-[calc(0.5rem+env(safe-area-inset-bottom))] grid grid-cols-5 items-center shadow-panel">
         {/* Col 1: Triage */}
@@ -1594,6 +1602,19 @@ export const App: React.FC = () => {
                 <span>Hilfe & Anleitung</span>
               </button>
 
+              <button
+                type="button"
+                onClick={() => {
+                  triggerHaptic(10);
+                  setShowMobileProfile(false);
+                  setShowAbout(true);
+                }}
+                className="w-full px-3 py-2.5 rounded-btn text-left flex items-center gap-3 hover:bg-panel-elevated transition-colors text-xs cursor-pointer text-main"
+              >
+                <Brain className="w-4 h-4 text-accent" />
+                <span>Über MindSift</span>
+              </button>
+
               {isServerAdmin && (
                 <button
                   type="button"
@@ -1626,6 +1647,11 @@ export const App: React.FC = () => {
                 <span>Abmelden</span>
               </button>
             </div>
+
+            {/* Version & About Hint on Mobile */}
+            <div className="pt-2 text-center text-[10px] text-faint font-mono">
+              MindSift {APP_VERSION}
+            </div>
           </div>
         </div>
       )}
@@ -1725,6 +1751,8 @@ export const App: React.FC = () => {
         onOpenTask={handleOpenTask}
         onOpenList={handleOpenList}
       />
+
+      {showAbout && <AboutModal onClose={() => setShowAbout(false)} />}
     </div>
   );
 };

frontend/src/components/AppFooter.tsx

@@ -0,0 +1,45 @@
+import React from 'react';
+import { AuthStatus } from '../lib/types';
+import { APP_VERSION } from '../version';
+import { LegalLinks } from './LegalLinks';
+
+interface AppFooterProps {
+  legal?: AuthStatus['legal'];
+  onOpenAbout: () => void;
+}
+
+export const AppFooter: React.FC<AppFooterProps> = ({ legal, onOpenAbout }) => {
+  return (
+    <footer className="hidden sm:flex shrink-0 w-full max-w-6xl mx-auto px-4 py-2 items-center justify-between text-[11px] text-faint border-t border-border/40 select-none">
+      <div className="flex items-center gap-3">
+        <button
+          type="button"
+          onClick={onOpenAbout}
+          className="font-semibold text-muted hover:text-main transition-colors cursor-pointer"
+        >
+          MindSift
+        </button>
+        <button
+          type="button"
+          onClick={onOpenAbout}
+          className="font-mono hover:text-main transition-colors cursor-pointer"
+          title="Über MindSift & Versionsdetails"
+        >
+          {APP_VERSION}
+        </button>
+        <span className="text-border">·</span>
+        <button
+          type="button"
+          onClick={onOpenAbout}
+          className="hover:text-main transition-colors cursor-pointer underline-offset-2 hover:underline"
+        >
+          Über MindSift
+        </button>
+      </div>
+
+      <div className="flex items-center gap-3">
+        <LegalLinks legal={legal} className="!text-faint gap-3" />
+      </div>
+    </footer>
+  );
+};

frontend/src/components/LegalLinks.tsx

@@ -28,7 +28,9 @@ export const LegalLinks: React.FC<LegalLinksProps> = ({ legal, className = '', c
     }))
     .filter((e) => e.url || e.hasContent);
 
-  if (entries.length === 0 && !children) return null;
+  const customHref = legal?.customLinkUrl && safeHref(legal.customLinkUrl);
+
+  if (entries.length === 0 && !children && !customHref) return null;
 
   const openText = async (type: LegalType) => {
     setError(null);
@@ -52,6 +54,16 @@ export const LegalLinks: React.FC<LegalLinksProps> = ({ legal, className = '', c
           </button>
         )
       )}
+      {customHref && (
+        <a
+          href={customHref as string}
+          target="_blank"
+          rel="noopener noreferrer"
+          className="hover:text-main underline-offset-2 hover:underline"
+        >
+          {legal?.customLinkLabel || legal?.customLinkUrl}
+        </a>
+      )}
       {children}
       {error && <span className="text-status-err">{error}</span>}
       {open && (

frontend/src/lib/types.ts

@@ -20,6 +20,8 @@ export interface AuthStatus {
     hasImprintContent?: boolean;
     privacyUrl?: string;
     hasPrivacyContent?: boolean;
+    customLinkLabel?: string;
+    customLinkUrl?: string;
   };
   // Voice input: own Whisper server, the browser's recognition, or switched off (STT_* environment)
   voice?: { mode: VoiceMode; maxSeconds: number };

internal/api/handlers_auth.go

@@ -52,6 +52,8 @@ func (s *Server) handleAuthStatus(w http.ResponseWriter, r *http.Request) {
 			"hasImprintContent": s.cfg.Legal.ImprintContent != "",
 			"privacyUrl":        s.cfg.Legal.PrivacyURL,
 			"hasPrivacyContent": s.cfg.Legal.PrivacyContent != "",
+			"customLinkLabel":   s.cfg.Legal.CustomLinkLabel,
+			"customLinkUrl":     s.cfg.Legal.CustomLinkURL,
 		},
 	}
 	// Countdown to the next demo reset; seconds as well, so client clocks do not matter

internal/api/server_test.go

@@ -1388,7 +1388,12 @@ func TestLegalTextsArePublic(t *testing.T) {
 	}
 	defer store.Close()
 	cfg := &config.Config{Port: "8080", DatabasePath: dbPath, JWTSecret: "test-jwt-secret-key",
-		Legal: config.LegalTexts{ImprintContent: "# Impressum\nMax Muster", PrivacyURL: "https://example.org/datenschutz"}}
+		Legal: config.LegalTexts{
+			ImprintContent:  "# Impressum\nMax Muster",
+			PrivacyURL:      "https://example.org/datenschutz",
+			CustomLinkLabel: "Support",
+			CustomLinkURL:   "https://support.example.org",
+		}}
 	router := NewServer(cfg, store, ws.NewHub(), nil).Router()
 
 	rec := httptest.NewRecorder()
@@ -1399,10 +1404,12 @@ func TestLegalTextsArePublic(t *testing.T) {
 			HasImprintContent bool   `json:"hasImprintContent"`
 			PrivacyURL        string `json:"privacyUrl"`
 			HasPrivacyContent bool   `json:"hasPrivacyContent"`
+			CustomLinkLabel   string `json:"customLinkLabel"`
+			CustomLinkURL     string `json:"customLinkUrl"`
 		} `json:"legal"`
 	}
 	_ = json.Unmarshal(rec.Body.Bytes(), &st)
-	if !st.Legal.HasImprintContent || st.Legal.HasPrivacyContent || st.Legal.PrivacyURL != "https://example.org/datenschutz" {
+	if !st.Legal.HasImprintContent || st.Legal.HasPrivacyContent || st.Legal.PrivacyURL != "https://example.org/datenschutz" || st.Legal.CustomLinkLabel != "Support" || st.Legal.CustomLinkURL != "https://support.example.org" {
 		t.Fatalf("unexpected legal status: %+v", st.Legal)
 	}
 

internal/config/config.go

@@ -94,8 +94,9 @@ func (s SpeechConfig) Mode(demo bool) string {
 }
 
 type LegalTexts struct {
-	ImprintURL, ImprintContent string
-	PrivacyURL, PrivacyContent string
+	ImprintURL, ImprintContent     string
+	PrivacyURL, PrivacyContent     string
+	CustomLinkLabel, CustomLinkURL string
 }
 
 // Publicly known JWT secrets (old code default and the placeholders from .env.example, compose and
@@ -171,6 +172,20 @@ func legalURL(name string) string {
 	return v
 }
 
+// legalCustomLink accepts only https links for the custom footer link.
+func legalCustomLink(labelVar, urlVar string) (string, string) {
+	u := strings.TrimSpace(os.Getenv(urlVar))
+	if u == "" {
+		return "", ""
+	}
+	if !strings.HasPrefix(u, "https://") {
+		slog.Warn("Custom-Link-URL ignoriert: nur https erlaubt", "variable", urlVar, "url", u)
+		return "", ""
+	}
+	label := strings.TrimSpace(os.Getenv(labelVar))
+	return label, u
+}
+
 func Load() *Config {
 	port := getEnv("PORT", "8080")
 	dataDir := getEnv("DATA_DIR", "./data")
@@ -247,12 +262,17 @@ func Load() *Config {
 			QuotaMB:    envInt("MEDIA_QUOTA_MB", 0, 0, 10000000),
 			DemoMaxMB:  envInt("MEDIA_DEMO_MAX_MB", 3, 1, 100),
 		},
-		Legal: LegalTexts{
-			ImprintURL:     legalURL("LEGAL_IMPRINT_URL"),
-			ImprintContent: legalContent("LEGAL_IMPRINT_CONTENT"),
-			PrivacyURL:     legalURL("LEGAL_PRIVACY_URL"),
-			PrivacyContent: legalContent("LEGAL_PRIVACY_CONTENT"),
-		},
+		Legal: func() LegalTexts {
+			customLabel, customURL := legalCustomLink("LEGAL_CUSTOM_LINK_LABEL", "LEGAL_CUSTOM_LINK_URL")
+			return LegalTexts{
+				ImprintURL:      legalURL("LEGAL_IMPRINT_URL"),
+				ImprintContent:  legalContent("LEGAL_IMPRINT_CONTENT"),
+				PrivacyURL:      legalURL("LEGAL_PRIVACY_URL"),
+				PrivacyContent:  legalContent("LEGAL_PRIVACY_CONTENT"),
+				CustomLinkLabel: customLabel,
+				CustomLinkURL:   customURL,
+			}
+		}(),
 	}
 }
 

internal/config/config_test.go

@@ -81,3 +81,42 @@ func TestJWTSecretNeverUsesAKnownDefault(t *testing.T) {
 		t.Fatalf("a real JWT_SECRET must win, got %q", got)
 	}
 }
+
+func TestCustomLinkValidation(t *testing.T) {
+	t.Setenv("DATA_DIR", t.TempDir())
+
+	// 1. Valid https URL and label
+	t.Setenv("LEGAL_CUSTOM_LINK_LABEL", "Unternehmensseite")
+	t.Setenv("LEGAL_CUSTOM_LINK_URL", "https://example.com/company")
+	cfg := Load()
+	if cfg.Legal.CustomLinkLabel != "Unternehmensseite" {
+		t.Errorf("expected label 'Unternehmensseite', got %q", cfg.Legal.CustomLinkLabel)
+	}
+	if cfg.Legal.CustomLinkURL != "https://example.com/company" {
+		t.Errorf("expected url 'https://example.com/company', got %q", cfg.Legal.CustomLinkURL)
+	}
+
+	// 2. Insecure http URL -> ignored
+	t.Setenv("LEGAL_CUSTOM_LINK_LABEL", "Insecure Site")
+	t.Setenv("LEGAL_CUSTOM_LINK_URL", "http://insecure.example.com")
+	cfg = Load()
+	if cfg.Legal.CustomLinkURL != "" || cfg.Legal.CustomLinkLabel != "" {
+		t.Errorf("expected empty custom link for http, got url=%q label=%q", cfg.Legal.CustomLinkURL, cfg.Legal.CustomLinkLabel)
+	}
+
+	// 3. Invalid scheme (javascript:) -> ignored
+	t.Setenv("LEGAL_CUSTOM_LINK_LABEL", "Exploit")
+	t.Setenv("LEGAL_CUSTOM_LINK_URL", "javascript:alert(1)")
+	cfg = Load()
+	if cfg.Legal.CustomLinkURL != "" || cfg.Legal.CustomLinkLabel != "" {
+		t.Errorf("expected empty custom link for javascript:, got url=%q label=%q", cfg.Legal.CustomLinkURL, cfg.Legal.CustomLinkLabel)
+	}
+
+	// 4. Empty URL -> empty
+	t.Setenv("LEGAL_CUSTOM_LINK_LABEL", "Only Label")
+	t.Setenv("LEGAL_CUSTOM_LINK_URL", "")
+	cfg = Load()
+	if cfg.Legal.CustomLinkURL != "" || cfg.Legal.CustomLinkLabel != "" {
+		t.Errorf("expected empty custom link when url is empty, got url=%q label=%q", cfg.Legal.CustomLinkURL, cfg.Legal.CustomLinkLabel)
+	}
+}