Fortschrittsbalken: stetiger Creep statt fixer Sprünge

Balken kriecht jetzt asymptotisch innerhalb jeder Phase
(queued 2-10%, recherche 12-30%, analyse 33-60%, faktencheck 65-92%)
statt bei Phasenwechsel hart zu springen. 3% des Restwegs pro
500ms-Tick sorgt für gleichmäßige Bewegung unabhängig von der
Phasendauer.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/static/js/components.js

@@ -228,6 +228,8 @@ const UI = {
 
     _progressStartTime: null,
     _progressTimer: null,
+    _progressCreepTimer: null,
+    _progressCurrentPercent: 0,
 
     /**
      * Fortschrittsanzeige einblenden und Status setzen.
@@ -279,11 +281,25 @@ const UI = {
             else if (i + 1 === step.active) el.classList.add('active');
         });
 
+        // Phasen-Bereiche für stetigen Fortschritt
+        const ranges = {
+            queued:            { from: 2,  to: 10 },
+            researching:       { from: 12, to: 30 },
+            deep_researching:  { from: 12, to: 30 },
+            analyzing:         { from: 33, to: 60 },
+            factchecking:      { from: 65, to: 92 },
+            cancelling:        { from: 0,  to: 5 },
+        };
+
+        const range = ranges[status] || ranges.queued;
         const fill = document.getElementById('progress-fill');
-        const percent = step.active === 0 ? 5 : Math.round((step.active / 3) * 100);
         if (fill) {
-            fill.style.width = percent + '%';
+            // Nicht rückwärts gehen, mindestens auf Phasen-Start springen
+            this._progressCurrentPercent = Math.max(this._progressCurrentPercent, range.from);
+            fill.style.width = this._progressCurrentPercent + '%';
+            this._startProgressCreep(range.to);
         }
+        const percent = Math.round(this._progressCurrentPercent);
 
         // ARIA-Werte auf der Progressbar aktualisieren
         bar.setAttribute('aria-valuenow', String(percent));
@@ -314,6 +330,33 @@ const UI = {
         }, 1000);
     },
 
+    /**
+     * Creep-Animation starten: Balken kriecht asymptotisch zum Ziel.
+     */
+    _startProgressCreep(target) {
+        this._stopProgressCreep();
+        this._progressCreepTimer = setInterval(() => {
+            const remaining = target - this._progressCurrentPercent;
+            if (remaining <= 0.1) return;
+            // 3% des Restwegs pro Tick → asymptotisch, nie überschießend
+            this._progressCurrentPercent += remaining * 0.03;
+            const fill = document.getElementById('progress-fill');
+            if (fill) fill.style.width = this._progressCurrentPercent + '%';
+            const bar = document.getElementById('progress-bar');
+            if (bar) bar.setAttribute('aria-valuenow', String(Math.round(this._progressCurrentPercent)));
+        }, 500);
+    },
+
+    /**
+     * Creep-Animation stoppen.
+     */
+    _stopProgressCreep() {
+        if (this._progressCreepTimer) {
+            clearInterval(this._progressCreepTimer);
+            this._progressCreepTimer = null;
+        }
+    },
+
     /**
      * Abschluss-Animation: Grüner Balken mit Summary-Text.
      */
@@ -321,8 +364,10 @@ const UI = {
         const bar = document.getElementById('progress-bar');
         if (!bar) return;
 
-        // Timer stoppen
+        // Timer und Creep stoppen
         this._stopProgressTimer();
+        this._stopProgressCreep();
+        this._progressCurrentPercent = 100;
 
         // Alle Steps auf done
         ['step-researching', 'step-analyzing', 'step-factchecking'].forEach(id => {
@@ -369,8 +414,9 @@ const UI = {
         if (!bar) return;
         bar.style.display = 'block';
 
-        // Timer stoppen
+        // Timer und Creep stoppen
         this._stopProgressTimer();
+        this._stopProgressCreep();
 
         // Error-Klasse
         bar.classList.remove('progress-bar--complete');
@@ -416,6 +462,8 @@ const UI = {
             bar.classList.remove('progress-bar--complete', 'progress-bar--error');
         }
         this._stopProgressTimer();
+        this._stopProgressCreep();
+        this._progressCurrentPercent = 0;
     },
 
     /**