fix(live): expose full refresh busy and phase progress

Ensure full refresh marks the live projection as building before source refresh awaits, and expose phase-specific counters so language detection progress is determinate.

Covers #40 and #41.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

test/liveProjectionRoutes.test.js

@@ -78,4 +78,25 @@ test('projection status exposes phase-specific Laya progress separately from cat
     assert.equal(state.total, 12);
     assert.equal(state.layaProcessed, 1);
     assert.equal(state.layaTotal, 2);
+    assert.equal(state.phaseProcessed, 1);
+    assert.equal(state.phaseTotal, 2);
+});
+
+test('projection status exposes generic phase progress outside Laya analysis', () => {
+    const state = serializeState({
+        status: 'building',
+        phase: 'projecting',
+        started_at: 100,
+        completed_at: null,
+        input_hash: null,
+        projected_count: 0,
+        processed_count: 7,
+        total_count: 12,
+        laya_processed_count: 0,
+        laya_total_count: 0,
+        error: null
+    });
+
+    assert.equal(state.phaseProcessed, 7);
+    assert.equal(state.phaseTotal, 12);
 });