fix(mobile): polish photo carousels and video viewer controls (#8079)

## Summary
- Keep neighboring carousel photos visible, add page-change haptics, and
reuse appearance-style dots with native iOS glass and grouped actions.
- Refine full-screen video controls with fading transport, cycling
speeds, pinch-to-zoom, and double-tap reset before swipe-to-dismiss.

### Related issue
N/A. Checked recent open PRs; repository issue search was unavailable.

### Testing
- Mobile analysis/format checks, file-size guards, and full Flutter
suite passed (2,680 tests; 4 skipped).
- Built, installed, and manually verified on the connected iPhone.
- `just ci` was attempted but blocked fetching a Rust dependency because
this Mac could not connect to GitHub.

---------

Signed-off-by: kenny lopez <klopez4212@gmail.com>
Signed-off-by: klopez4212 <klopez4212@gmail.com>

scripts/test-mobile-pagination-accessibility.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+# Test the actual UIKit paginator and Flutter bridge on a booted iOS simulator.
+# Usage: /bin/bash scripts/test-mobile-pagination-accessibility.sh <simulator-udid>
+set -euo pipefail
+repo_root=$(cd "$(dirname "$0")/.." && pwd)
+device=${1:?Pass a booted iOS simulator UDID}
+flutter_root=$(sed -n 's/^FLUTTER_ROOT=//p' "$repo_root/mobile/ios/Flutter/Generated.xcconfig")
+frameworks="$flutter_root/bin/cache/artifacts/engine/ios/Flutter.xcframework/ios-arm64_x86_64-simulator"
+fixture=$(mktemp -d)
+trap 'rm -r "$fixture"' EXIT
+xcrun --sdk iphonesimulator swiftc \
+  -sdk "$(xcrun --sdk iphonesimulator --show-sdk-path)" \
+  -target "$(uname -m)-apple-ios15.0-simulator" \
+  -F "$frameworks" -framework Flutter \
+  -Xlinker -rpath -Xlinker "$frameworks" \
+  "$repo_root/mobile/ios/Runner/ThemePaginationGeometry.swift" \
+  "$repo_root/mobile/ios/Runner/ThemePaginationGlassControl.swift" \
+  "$repo_root/mobile/ios/NativeControlTests/ThemePaginationAccessibilityTests.swift" \
+  -o "$fixture/pagination-accessibility-tests"
+xcrun simctl spawn "$device" "$fixture/pagination-accessibility-tests"

scripts/test-mobile-pagination.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Compile the UIKit control's production geometry without Flutter or a simulator.
+set -euo pipefail
+repo_root=$(cd "$(dirname "$0")/.." && pwd)
+fixture=$(mktemp -d)
+trap 'rm -r "$fixture"' EXIT
+xcrun swiftc \
+  "$repo_root/mobile/ios/Runner/ThemePaginationGeometry.swift" \
+  "$repo_root/mobile/ios/NativeControlTests/ThemePaginationGeometryTests.swift" \
+  -o "$fixture/pagination-tests"
+"$fixture/pagination-tests"