From 183351044a5d62db13ddb0230004a983368f6c5f Mon Sep 17 00:00:00 2001
From: "v.lagerev" <lagerev.vl@gmail.com>
Date: Mon, 18 May 2026 02:12:55 +0300
Subject: [PATCH] tweak(stream-header): require curtain drag past 90% of full
 peek travel to commit so short drags snap back as accidental

---
 src/app/components/stream-header/geometry.ts        | 13 +++++++++++--
 .../components/stream-header/useCurtainGesture.ts   | 13 +++++++------
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/src/app/components/stream-header/geometry.ts b/src/app/components/stream-header/geometry.ts
index 516fcd17..9afdc3d3 100644
--- a/src/app/components/stream-header/geometry.ts
+++ b/src/app/components/stream-header/geometry.ts
@@ -52,11 +52,20 @@ export const CURTAIN_SNAP_EASING = 'cubic-bezier(0.22, 1, 0.36, 1)';
 // horseshoe surfaces elsewhere in the app.
 export const CURTAIN_RADIUS_PX = 24;
 
+// Total vertical travel of the curtain between `closed` and `peek` —
+// the resting-top delta between the two snaps. Used as the basis for
+// the peek-commit threshold: the user must drag (rubber-banded) at
+// least COMMIT_THRESHOLD × PEEK_TRAVEL_PX before release for the snap
+// to flip. Anything shorter reads as accidental and springs back.
+export const PEEK_TRAVEL_PX = CHIP_ROW_PX + CHIP_GAP_PX + CHIP_ROW_PX + CURTAIN_BREATHER_PX;
+
 // Touch gesture tuning. RUBBER_BAND dampens finger→curtain motion so
 // the chip reveal feels resistive; COMMIT_THRESHOLD is the fraction of
-// a stage the user must cross on release to advance.
+// the full peek travel the user must cross on release for the snap to
+// commit. Tuned high (≈90%) so anything below «дотянул почти до конца»
+// reads as accidental and snaps back to `closed`.
 export const RUBBER_BAND = 0.65;
 export const DIRECTION_DEAD_ZONE_PX = 10;
-export const COMMIT_THRESHOLD = 0.65;
+export const COMMIT_THRESHOLD = 0.9;
 // Pull-up distance (raw finger px) required to close an active form.
 export const ACTIVE_CLOSE_THRESHOLD_PX = 100;
diff --git a/src/app/components/stream-header/useCurtainGesture.ts b/src/app/components/stream-header/useCurtainGesture.ts
index facf87fb..53efb23d 100644
--- a/src/app/components/stream-header/useCurtainGesture.ts
+++ b/src/app/components/stream-header/useCurtainGesture.ts
@@ -2,9 +2,9 @@ import { MutableRefObject, useEffect, useRef } from 'react';
 import { isNativePlatform } from '../../utils/capacitor';
 import {
   ACTIVE_CLOSE_THRESHOLD_PX,
-  CHIP_ROW_PX,
   COMMIT_THRESHOLD,
   DIRECTION_DEAD_ZONE_PX,
+  PEEK_TRAVEL_PX,
   RUBBER_BAND,
 } from './geometry';
 import { CurtainSnap, isFormSnap } from './useCurtainState';
@@ -144,11 +144,12 @@ export function useCurtainGesture({ scrollRef, snap, setLiveDrag, commit }: Args
           next = 'closed';
         }
       } else {
-        // Single-stage peek toggle. Threshold is COMMIT_THRESHOLD of a
-        // chip-row worth of rubber-banded drag — same touch effort as
-        // the old per-stage commit, but now flips the WHOLE peek in
-        // one motion (`closed` ⇄ `peek`).
-        const progress = lastDelta / CHIP_ROW_PX;
+        // Single-stage peek toggle. Threshold is COMMIT_THRESHOLD of
+        // the FULL peek travel — the rubber-banded drag must reach
+        // ≈90% of the closed→peek distance before release for the
+        // snap to flip. Anything shorter springs back so a brisk-but-
+        // short drag doesn't accidentally open (or close) the curtain.
+        const progress = lastDelta / PEEK_TRAVEL_PX;
         if (Math.abs(progress) >= COMMIT_THRESHOLD) {
           if (currentSnap === 'closed' && progress > 0) next = 'peek';
           else if (currentSnap === 'peek' && progress < 0) next = 'closed';