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/build_apk.go

@@ -253,8 +253,9 @@ func (h *Handler) buildAPKAgent(ctx context.Context, req *BuildRequest) (BuildRe
 	}
 
 	platform := BuildPlatform{GOOS: "linux", GOARCH: "arm64", Ext: ""}
-	h.setProgress(req.CancelToken, "Compiling agent (linux/arm64)", 25)
+	stopCompileProgress := h.tickCompileProgress(ctx, req.CancelToken, "Compiling agent (linux/arm64)", 25, 54, false)
 	outputPath, err := h.compileWorker(ctx, agentDir, buildDir, req, buildID, platform, false)
+	stopCompileProgress()
 	if err != nil {
 		cleanupBuild()
 		return BuildResponse{Success: false, Error: err.Error()}, http.StatusInternalServerError, ""