Forge success label and real progress bar tied to server compile stages.

Replace Dispensed with Forged in the reveal modal, poll builder/progress with indeterminate-until-first-byte UX, and emit interpolated compile progress during long garble builds.

server/internal/builder/progress.go

@@ -0,0 +1,45 @@
+package builder
+
+import (
+	"context"
+	"time"
+)
+
+// tickCompileProgress emits interpolated progress during long compile steps (garble can run 10+ minutes).
+// Returns a stop function; call it when the compile finishes.
+func (h *Handler) tickCompileProgress(ctx context.Context, token, stage string, startPct, capPct int, obfuscated bool) func() {
+	if token == "" || capPct <= startPct {
+		return func() {}
+	}
+	est := 3 * time.Minute
+	if obfuscated {
+		est = 12 * time.Minute
+	}
+	done := make(chan struct{})
+	go func() {
+		h.setProgress(token, stage, startPct)
+		ticker := time.NewTicker(2 * time.Second)
+		defer ticker.Stop()
+		start := time.Now()
+		for {
+			select {
+			case <-done:
+				return
+			case <-ctx.Done():
+				return
+			case <-ticker.C:
+				elapsed := time.Since(start)
+				ratio := float64(elapsed) / float64(est)
+				if ratio > 0.92 {
+					ratio = 0.92
+				}
+				pct := startPct + int(float64(capPct-startPct)*ratio)
+				if pct >= capPct {
+					pct = capPct - 1
+				}
+				h.setProgress(token, stage, pct)
+			}
+		}
+	}()
+	return func() { close(done) }
+}