From b49a5e72b548ea9c5206a7f2b00160ba8f8fa43c Mon Sep 17 00:00:00 2001
From: ciregenz <ciregenz@berkeley.edu>
Date: Tue, 30 Jun 2026 23:52:20 -0700
Subject: [PATCH] [eric] onboarding: press-and-hold to launch (warm bloom grows
 to fill screen, ported from glowup CommitmentView) as the payoff commit
 transition

---
 .../Onboarding/flow/HoldToLaunch.tsx          | 124 ++++++++++++++++++
 .../app/components/Onboarding/flow/Payoff.tsx |  18 +--
 2 files changed, 127 insertions(+), 15 deletions(-)
 create mode 100644 frontend/src/app/components/Onboarding/flow/HoldToLaunch.tsx

diff --git a/frontend/src/app/components/Onboarding/flow/HoldToLaunch.tsx b/frontend/src/app/components/Onboarding/flow/HoldToLaunch.tsx
new file mode 100644
index 00000000..e5755dd1
--- /dev/null
+++ b/frontend/src/app/components/Onboarding/flow/HoldToLaunch.tsx
@@ -0,0 +1,124 @@
+// Press-and-hold to launch, ported from the glowup CommitmentView. Holding fills a progress ring
+// AND grows a warm radial bloom from the button until it covers the screen, then hands off (a clean
+// "commit -> go" transition into the running agent). Release early and it shrinks back.
+// Reduced motion: a plain button, no bloom, instant.
+
+import React, { useCallback, useEffect, useRef, useState } from 'react';
+import { useReducedMotion } from '@/shared/hooks/useReducedMotion';
+import { useOnboardingSkin } from './onboardingSkin';
+
+const HOLD_MS = 1100;
+
+export const HoldToLaunch: React.FC<{ label: string; onLaunch: () => void }> = ({ label, onLaunch }) => {
+  const S = useOnboardingSkin();
+  const reduce = useReducedMotion();
+  const btnRef = useRef<HTMLButtonElement>(null);
+  const rafRef = useRef<number | null>(null);
+  const startRef = useRef<number>(0);
+  const [progress, setProgress] = useState(0);
+  const [committed, setCommitted] = useState(false);
+  const [origin, setOrigin] = useState<{ x: number; y: number }>({ x: 0, y: 0 });
+
+  const stop = useCallback(() => {
+    if (rafRef.current) cancelAnimationFrame(rafRef.current);
+    rafRef.current = null;
+  }, []);
+
+  const commit = useCallback(() => {
+    stop();
+    setCommitted(true);
+    // Let the bloom cover the screen (600ms) before handing off.
+    window.setTimeout(onLaunch, 600);
+  }, [stop, onLaunch]);
+
+  const tick = useCallback(() => {
+    const p = Math.min(1, (performance.now() - startRef.current) / HOLD_MS);
+    setProgress(p);
+    if (p >= 1) { commit(); return; }
+    rafRef.current = requestAnimationFrame(tick);
+  }, [commit]);
+
+  const begin = useCallback(() => {
+    if (committed) return;
+    if (reduce) { commit(); return; }
+    const r = btnRef.current?.getBoundingClientRect();
+    if (r) setOrigin({ x: r.left + r.width / 2, y: r.top + r.height / 2 });
+    startRef.current = performance.now();
+    rafRef.current = requestAnimationFrame(tick);
+  }, [committed, reduce, commit, tick]);
+
+  const cancel = useCallback(() => {
+    if (committed) return;
+    stop();
+    setProgress(0);
+  }, [committed, stop]);
+
+  useEffect(() => () => stop(), [stop]);
+
+  // Bloom radius: covers the screen from the button center once committed.
+  const maxR = Math.hypot(
+    Math.max(origin.x, window.innerWidth - origin.x),
+    Math.max(origin.y, window.innerHeight - origin.y),
+  ) * 1.25;
+  const bloomR = committed ? maxR : progress * maxR;
+
+  return (
+    <>
+      {/* Warm bloom growing from the button center; ignores pointer so the hold isn't interrupted. */}
+      {(progress > 0 || committed) && (
+        <div
+          style={{
+            position: 'fixed',
+            left: origin.x - bloomR,
+            top: origin.y - bloomR,
+            width: bloomR * 2,
+            height: bloomR * 2,
+            borderRadius: '50%',
+            background: `radial-gradient(circle, ${S.accent} 0%, ${S.accent} 40%, transparent 72%)`,
+            opacity: committed ? 1 : 0.9,
+            pointerEvents: 'none',
+            transition: committed ? 'width .6s ease, height .6s ease, left .6s ease, top .6s ease, opacity .6s ease' : 'none',
+            zIndex: 1,
+          }}
+        />
+      )}
+      <button
+        ref={btnRef}
+        onPointerDown={begin}
+        onPointerUp={cancel}
+        onPointerLeave={cancel}
+        style={{
+          position: 'relative',
+          zIndex: 2,
+          background: progress > 0.02 ? S.accent : S.ctaBg,
+          color: progress > 0.02 ? '#fff' : S.ctaText,
+          border: 'none',
+          borderRadius: 9,
+          padding: '8px 18px',
+          fontFamily: S.sans,
+          fontSize: 14,
+          fontWeight: 600,
+          cursor: 'pointer',
+          whiteSpace: 'nowrap',
+          userSelect: 'none',
+          touchAction: 'none',
+          overflow: 'hidden',
+        }}
+      >
+        {/* fill sweeps left->right as you hold */}
+        <span
+          style={{
+            position: 'absolute',
+            inset: 0,
+            background: S.accent,
+            transform: `scaleX(${progress})`,
+            transformOrigin: 'left',
+            opacity: 0.35,
+            pointerEvents: 'none',
+          }}
+        />
+        <span style={{ position: 'relative' }}>{progress > 0.02 ? 'Hold…' : label}</span>
+      </button>
+    </>
+  );
+};
diff --git a/frontend/src/app/components/Onboarding/flow/Payoff.tsx b/frontend/src/app/components/Onboarding/flow/Payoff.tsx
index 31437e6e..12e75541 100644
--- a/frontend/src/app/components/Onboarding/flow/Payoff.tsx
+++ b/frontend/src/app/components/Onboarding/flow/Payoff.tsx
@@ -5,6 +5,7 @@ import React, { useState } from 'react';
 import { useOnboardingSkin } from './onboardingSkin';
 import { LineIcon } from './OnboardingIcons';
 import { Heading } from './OnboardingAtoms';
+import { HoldToLaunch } from './HoldToLaunch';
 import type { PayoffIdea } from './onboardingFlowTypes';
 
 const IdeaRow: React.FC<{ idea: PayoffIdea; onPick: () => void }> = ({ idea, onPick }) => {
@@ -75,21 +76,8 @@ export const Payoff: React.FC<{
             paddingTop: 14,
           }}
         >
-          <span style={{ fontSize: 13, color: S.muted }}>a real agent goes and does this, live</span>
-          <span
-            onClick={onRun}
-            style={{
-              background: S.ctaBg,
-              color: S.ctaText,
-              borderRadius: 9,
-              padding: '8px 18px',
-              fontWeight: 600,
-              cursor: 'pointer',
-              whiteSpace: 'nowrap',
-            }}
-          >
-            Do it &rarr;
-          </span>
+          <span style={{ fontSize: 13, color: S.muted }}>hold to send a real agent on it, live</span>
+          <HoldToLaunch label="Hold to do it" onLaunch={onRun} />
         </div>
       </div>