feat(i18n): Progress-Popup + Pipeline-Stati lokalisieren

- components._getStepLabel und progress-popup-title nutzen T()
  fuer Erste Recherche laeuft / Aktualisierung laeuft / In Warteschlange
  / Wird abgebrochen.
- pipeline._formatHeader / _relativeTime / _formatCount lokalisiert:
  Status-Texte (erledigt/laeuft/Fehler), Zeitangaben (gerade eben,
  vor X Min/Std/Tagen), Aktualisierung-laeuft-Header.
- dashboard.html: data-i18n auf pipeline-empty, progress-popup-title,
  progress-check-label (4 Stueck).
- Cache-Buster fuer components.js + pipeline.js auf v=20260513d.

src/static/js/pipeline.js

@@ -254,7 +254,8 @@ const Pipeline = {
 
         // Brandneue Lage ohne Refresh
         if (!this._lastRefreshHeader) {
-            this._renderEmpty('Noch nie aktualisiert. Starte den ersten Refresh.');
+            const _t = (k, fb) => (typeof T === 'function') ? T(k, fb) : fb;
+            this._renderEmpty(_t('pipeline.empty', 'Noch nie aktualisiert. Starte den ersten Refresh.'));
             return;
         }
 
@@ -502,20 +503,22 @@ const Pipeline = {
     _formatHeader() {
         const r = this._lastRefreshHeader;
         if (!r) return '';
+        const _t = (k, fb) => (typeof T === 'function') ? T(k, fb) : fb;
+        const lastLabel = _t('pipeline.last_refresh', 'Letzter Refresh');
         let parts = [];
         if (r.started_at) {
             const rel = this._relativeTime(r.started_at);
-            parts.push(rel ? `Letzter Refresh: ${rel}` : `Letzter Refresh: ${r.started_at}`);
+            parts.push(rel ? `${lastLabel}: ${rel}` : `${lastLabel}: ${r.started_at}`);
         }
         if (r.duration_sec != null) {
-            parts.push(`Dauer: ${r.duration_sec} s`);
+            parts.push(`${_t('pipeline.duration_prefix', 'Dauer:')} ${r.duration_sec} s`);
         }
         if (r.status === 'running') {
-            parts = ['Aktualisierung läuft...'];
+            parts = [_t('pipeline.running', 'Aktualisierung läuft...')];
         } else if (r.status === 'cancelled') {
-            parts.push('abgebrochen');
+            parts.push(_t('pipeline.cancelled', 'abgebrochen'));
         } else if (r.status === 'error') {
-            parts.push('mit Fehler beendet');
+            parts.push(_t('pipeline.with_errors', 'mit Fehler beendet'));
         }
         return parts.join(' · ');
     },
@@ -527,28 +530,34 @@ const Pipeline = {
             if (isNaN(d.getTime())) return '';
             const diffMs = Date.now() - d.getTime();
             const min = Math.floor(diffMs / 60000);
-            if (min < 1) return 'gerade eben';
-            if (min < 60) return `vor ${min} Min`;
+            const _t = (k, fb) => (typeof T === 'function') ? T(k, fb) : fb;
+            if (min < 1) return _t('time.just_now', 'gerade eben');
+            if (min < 60) return _t('time.minutes_ago', 'vor {n} Min').replace('{n}', min);
             const h = Math.floor(min / 60);
-            if (h < 24) return `vor ${h} Std`;
+            if (h < 24) return _t('time.hours_ago', 'vor {n} Std').replace('{n}', h);
             const days = Math.floor(h / 24);
-            return `vor ${days} Tag${days === 1 ? '' : 'en'}`;
+            if (days === 1) return _t('time.day_ago', 'vor 1 Tag');
+            return _t('time.days_ago', 'vor {n} Tagen').replace('{n}', days);
         } catch (e) {
             return '';
         }
     },
 
     _formatCount(stepKey, cv, cs, status) {
+        const _t = (k, fb) => (typeof T === 'function') ? T(k, fb) : fb;
+        const sDone = _t('pipeline.status.done', 'erledigt');
+        const sRun = _t('pipeline.status.running', 'läuft...');
+        const sErr = _t('pipeline.status.error', 'Fehler');
         // Qualitaetscheck: KEINE Zahlen, nur Status (Anforderung 3 vom User)
         if (stepKey === 'qc' || stepKey === 'summary') {
-            if (status === 'done') return '<span class="count-status">erledigt</span>';
-            if (status === 'active') return '<span class="count-status">läuft...</span>';
-            if (status === 'error') return '<span class="count-status">Fehler</span>';
+            if (status === 'done') return `<span class="count-status">${sDone}</span>`;
+            if (status === 'active') return `<span class="count-status">${sRun}</span>`;
+            if (status === 'error') return `<span class="count-status">${sErr}</span>`;
             return '<span class="count-status">-</span>';
         }
         if (status === 'pending') return '<span class="count-status">-</span>';
-        if (status === 'active') return '<span class="count-status">läuft...</span>';
-        if (status === 'error') return '<span class="count-status">Fehler</span>';
+        if (status === 'active') return `<span class="count-status">${sRun}</span>`;
+        if (status === 'error') return `<span class="count-status">${sErr}</span>`;
         if (cv == null) return '<span class="count-status">-</span>';
 
         switch (stepKey) {