Polish store and v2rayA app for release

- Redesign store README as a minimal storefront

- Refine app README and remove technical clutter

- Update Sphera icon with refined vector styling

- Use original v2rayA app icon

- Use raw GitHub URL for v2rayA icon per Umbrel Community Store spec

- Add custom v2rayA image build for UmbrelOS nf_tables iptables

sphera-v2raya/Dockerfile

@@ -0,0 +1,67 @@
+FROM mzz2017/v2raya:v2.4.9@sha256:47f9acf99b23f19d804ab15303e8a7df7f66913d14c5ce0b39936d036dbb8500
+
+USER root
+
+# v2rayA inside Docker hard-codes "iptables-legacy" and "ip6tables-legacy".
+# UmbrelOS ships iptables 1.8.x with nf_tables backend, and v2rayA's redirect
+# mode emits REDIRECT rules without a protocol (-p), which both backends reject.
+# Replace the legacy binaries with small wrappers that forward to the modern
+# iptables and patch the problematic REDIRECT rule on the fly.
+RUN set -eux; \
+    rm -f /sbin/iptables-legacy /usr/sbin/iptables-legacy \
+          /sbin/ip6tables-legacy /usr/sbin/ip6tables-legacy; \
+    printf '%s\n' \
+        '#!/bin/sh' \
+        'has_redirect=0' \
+        'has_proto=0' \
+        'for arg in "$@"; do' \
+        '    case "$arg" in' \
+        '        -j) next_is_target=1 ;;' \
+        '        REDIRECT) if [ "$next_is_target" = 1 ]; then has_redirect=1; fi; next_is_target=0 ;;' \
+        '        -p) has_proto=1 ;;' \
+        '    esac' \
+        'done' \
+        'if [ "$has_redirect" = 1 ] && [ "$has_proto" = 0 ]; then' \
+        '    new_args=""' \
+        '    inserted=0' \
+        '    for arg in "$@"; do' \
+        '        if [ "$inserted" = 0 ] && [ "$arg" = "-j" ]; then' \
+        '            new_args="$new_args -p tcp"' \
+        '            inserted=1' \
+        '        fi' \
+        '        new_args="$new_args $arg"' \
+        '    done' \
+        '    set -- $new_args' \
+        'fi' \
+        'exec iptables "$@"' \
+        > /sbin/iptables-legacy; \
+    printf '%s\n' \
+        '#!/bin/sh' \
+        'has_redirect=0' \
+        'has_proto=0' \
+        'for arg in "$@"; do' \
+        '    case "$arg" in' \
+        '        -j) next_is_target=1 ;;' \
+        '        REDIRECT) if [ "$next_is_target" = 1 ]; then has_redirect=1; fi; next_is_target=0 ;;' \
+        '        -p) has_proto=1 ;;' \
+        '    esac' \
+        'done' \
+        'if [ "$has_redirect" = 1 ] && [ "$has_proto" = 0 ]; then' \
+        '    new_args=""' \
+        '    inserted=0' \
+        '    for arg in "$@"; do' \
+        '        if [ "$inserted" = 0 ] && [ "$arg" = "-j" ]; then' \
+        '            new_args="$new_args -p tcp"' \
+        '            inserted=1' \
+        '        fi' \
+        '        new_args="$new_args $arg"' \
+        '    done' \
+        '    set -- $new_args' \
+        'fi' \
+        'exec ip6tables "$@"' \
+        > /sbin/ip6tables-legacy; \
+    chmod +x /sbin/iptables-legacy /sbin/ip6tables-legacy; \
+    ln -s /sbin/iptables-legacy /usr/sbin/iptables-legacy 2>/dev/null || true; \
+    ln -s /sbin/ip6tables-legacy /usr/sbin/ip6tables-legacy 2>/dev/null || true
+
+ENTRYPOINT ["v2raya"]