feat: add progress bar + ETA to deck generation UI

ui/deckgenerator.css

@@ -1298,3 +1298,41 @@
 .dg-log-error {
     color: #f59e0b;
 }
+
+/* ── Progress Bar (Deck Generation) ──────────────────── */
+.dg-progress-wrap {
+    width: 100%;
+    max-width: 400px;
+    margin-top: 16px;
+}
+
+.dg-progress-bar {
+    height: 6px;
+    background: var(--surface-2, #2a2a3a);
+    border-radius: 3px;
+    overflow: hidden;
+}
+
+.dg-progress-fill {
+    height: 100%;
+    width: 0%;
+    background: linear-gradient(90deg, var(--accent, #7c6ff7), #a78bfa);
+    border-radius: 3px;
+    transition: width 1s ease;
+}
+
+.dg-progress-meta {
+    display: flex;
+    justify-content: space-between;
+    margin-top: 6px;
+    font-size: 0.78rem;
+}
+
+.dg-progress-phase {
+    color: var(--text-muted, #999);
+}
+
+.dg-progress-elapsed {
+    color: var(--text-muted, #999);
+    font-variant-numeric: tabular-nums;
+}

ui/deckgenerator.html

@@ -166,6 +166,15 @@
                     <div class="dg-spinner"></div>
                     <div class="dg-loading-text" id="dg-loading-text">Generating deck via Local AI...</div>
                 </div>
+                                    <div class="dg-progress-wrap" id="dg-progress-wrap" style="display:none">
+                        <div class="dg-progress-bar">
+                            <div class="dg-progress-fill" id="dg-progress-fill"></div>
+                        </div>
+                        <div class="dg-progress-meta">
+                            <span class="dg-progress-phase" id="dg-progress-phase"></span>
+                            <span class="dg-progress-elapsed" id="dg-progress-elapsed">0s elapsed</span>
+                        </div>
+                    </div>
 
                 <!-- Results -->
                 <div class="dg-results" id="dg-results" style="display:none">

ui/deckgenerator.js

@@ -53,6 +53,65 @@ const DeckGenerator = (() => {
 
     let searchTimeout = null;
 
+    // ── Progress bar state ──────────────────────────────
+    const PROGRESS_PHASES = [
+        { at: 0,  pct: 5,   msg: 'Connecting to AI model...' },
+        { at: 3,  pct: 10,  msg: 'Resolving commander on Scryfall...' },
+        { at: 6,  pct: 18,  msg: 'Building collection summary...' },
+        { at: 10, pct: 25,  msg: 'Sending prompt to LLM...' },
+        { at: 20, pct: 40,  msg: 'AI is building the 99...' },
+        { at: 35, pct: 55,  msg: 'Selecting cards and filling slots...' },
+        { at: 50, pct: 65,  msg: 'Running smart substitution...' },
+        { at: 70, pct: 78,  msg: 'Cross-referencing with collection...' },
+        { at: 90, pct: 88,  msg: 'Almost there — finalizing deck...' },
+        { at: 110, pct: 93, msg: 'Still working — large model can take a moment...' },
+    ];
+    let _progressInterval = null;
+    let _progressStart = 0;
+
+    function startProgress() {
+        _progressStart = Date.now();
+        const wrap = $('dg-progress-wrap');
+        const fill = $('dg-progress-fill');
+        const phase = $('dg-progress-phase');
+        const elapsed = $('dg-progress-elapsed');
+        if (!wrap) return;
+        wrap.style.display = 'block';
+        fill.style.width = '0%';
+        phase.textContent = '';
+        elapsed.textContent = '0s elapsed';
+        let lastPhaseIdx = -1;
+        _progressInterval = setInterval(() => {
+            const secs = Math.floor((Date.now() - _progressStart) / 1000);
+            elapsed.textContent = secs + 's elapsed';
+            for (let i = PROGRESS_PHASES.length - 1; i >= 0; i--) {
+                if (secs >= PROGRESS_PHASES[i].at) {
+                    fill.style.width = PROGRESS_PHASES[i].pct + '%';
+                    if (i !== lastPhaseIdx) {
+                        phase.textContent = PROGRESS_PHASES[i].msg;
+                        logMessage(PROGRESS_PHASES[i].msg, 'info');
+                        lastPhaseIdx = i;
+                    }
+                    break;
+                }
+            }
+        }, 1000);
+    }
+
+    function stopProgress(success) {
+        if (_progressInterval) {
+            clearInterval(_progressInterval);
+            _progressInterval = null;
+        }
+        const fill = $('dg-progress-fill');
+        const phase = $('dg-progress-phase');
+        const elapsed = $('dg-progress-elapsed');
+        if (fill) fill.style.width = success ? '100%' : '0%';
+        if (phase) phase.textContent = success ? 'Done!' : 'Failed';
+        const secs = Math.floor((Date.now() - _progressStart) / 1000);
+        if (elapsed) elapsed.textContent = secs + 's total';
+    }
+
     const $ = (id) => document.getElementById(id);
 
     // ── Init ────────────────────────────────────────────────
@@ -284,6 +343,7 @@ const DeckGenerator = (() => {
         logMessage('Building request body with commander: <b>' + state.commander.name + '</b>', 'info');
 
         setLoading(true, 'Generating deck via Local AI...');
+        startProgress();
 
         const body = buildRequestBody();
         logMessage('Sending request to AI model... this may take a moment.', 'info');
@@ -307,10 +367,12 @@ const DeckGenerator = (() => {
             const stats = state.previewResult.stats || {};
             const cardCount = (stats.total_cards || 0);
             logMessage('Deck generated: <b>' + cardCount + ' cards</b> | $' + (stats.total_price_usd || 0).toFixed(2) + ' estimated', 'success');
+                        stopProgress(true);
             renderResults(state.previewResult);
 
             toast('Deck generated: ' + (stats.total_cards || 0) + ' cards | $' + (stats.total_price_usd || 0), 'success');
         } catch (e) {
+                    stopProgress(false);
             toast(e.message || 'Generation failed', 'error');
             logMessage('Error: ' + (e.message || 'Unknown error'), 'error');
             setLoading(false);