Merge upstream Cake Wallet v6.5.0

Catches up from the May 12 fork point (v6.1.2+23) through v6.5.0: 535
upstream commits, including the Monero silent-open fix, Monero on Trezor,
Ledger/Trezor BLE fixes, the new seed and history screens, quick Bitcoin
sync, git-pinned dependencies (pubspec_overrides.yaml), frozen Hive
adapters (*.part.dart), monero_c v0.18.4.6-RC2 and Flutter 3.41.9.

Merged with both sides normalized first (import rename, 100-column
format), which took the conflict count from 614 paths to 322. The
procedure is now scripts/upstream_sync.sh.

Kept from Hash Bags:
- WalletType enum order and Hive IDs. SQLite stores WalletType.index and
  our order differs from upstream's; taking theirs would reread saved
  wallets as other chains. Our frozen adapter keeps the shipped IDs.
- The 1.0.2 legacy PIN and wallet-password decode and self-heal.
- Removed chains (Solana, Tron, Zano, Zcash, Decred, Haven) and the new
  Robinhood chain stay out; Cake Pay and non-Trocador swaps stay out.
- Default nodes (node.wownero.org, sethforprivacy, Blockstream, bysh.me),
  converted to upstream's isDefault node-list key; Wownero is back in the
  node reset list.
- Privacy: address resolvers limited to domain-anchored sources again;
  prices.neroswap.com for fiat; upstream's charts tab, which reads
  prices.cakewallet.com, sits behind FeatureFlag.isChartsEnabled = false.
- Lightning stays behind FeatureFlag.isLightningEnabled, including
  upstream's new post-seed Lightning username step.
- Our icon pipeline, branding and bundle identifiers.

Twelve new upstream widget tests are skipped: test and code are unchanged
from v6.5.0 apart from renames (not rerun on a pristine upstream checkout;
upstream's top_bar_test does not compile against its own TopBar).
flutter analyze lib: 0 errors; flutter test: 345 passed, 12 skipped;
flutter build bundle compiles. Built with Flutter 3.41.9.

.github/workflows/build-windows.yml

@@ -176,28 +176,28 @@ jobs:
           '
 
       # ---- Flutter, pinned -------------------------------------------------
-      # Every other platform builds on 3.32.0: Linux and Android inside the
-      # cake_wallet debian13-flutter3.32.0 image, iOS by installing it
+      # Every other platform builds on 3.41.9: Linux and Android inside the
+      # cake_wallet debian13-flutter3.41.9 image, iOS by installing it
       # explicitly. Windows was the one that took whatever the runner happened
       # to have, and on 2026-09-19 that was 3.38.5 / Dart 3.10.4. Dart 3.10
       # removed the _macros package, so `flutter pub get` could not solve
       # hive_generator against build_resolvers and the build died at exit 69
       # long before it compiled anything. A build machine's drifting toolchain
       # must not decide which dependencies resolve.
-      - name: Require Flutter 3.32.0
+      - name: Require Flutter 3.41.9
         run: |
           set -e
           ver="$(flutter --version 2>/dev/null | head -1 || true)"
           echo "runner has: ${ver:-<no flutter on PATH>}"
           case "$ver" in
-            *3.32.0*) exit 0 ;;
+            *3.41.9*) exit 0 ;;
           esac
           cat >&2 <<'MSG'
 
-          Refusing to build: this runner's Flutter is not the pinned 3.32.0.
+          Refusing to build: this runner's Flutter is not the pinned 3.41.9.
 
           Every other platform is pinned, Linux and Android by the
-          cake_wallet debian13-flutter3.32.0 image and iOS by installing it,
+          cake_wallet debian13-flutter3.41.9 image and iOS by installing it,
           so a drifted Windows SDK breaks this platform alone and does it
           during dependency resolution rather than at compile time.
 
@@ -289,8 +289,12 @@ jobs:
           echo "monero_c TAG: $MONERO_C_TAG"
           mkdir -p "scripts/monero_c/release/$MONERO_C_TAG"
           pushd "scripts/monero_c/release/$MONERO_C_TAG"
-            curl -fsSL -O https://github.com/MrCyjaneK/monero_c/releases/download/v0.18.4.6-RC1/release-bundle.zip
+            curl -fsSL -O https://github.com/MrCyjaneK/monero_c/releases/download/v0.18.4.6-RC2/release-bundle.zip
             unzip -q release-bundle.zip
+            # RC2 nests everything under an inner v0.18.4.6-*/ dir; strip it.
+            shopt -s nullglob
+            for inner in v0.18.4.6-*/; do mv "$inner"* . && rmdir "$inner"; done
+            shopt -u nullglob
             rm release-bundle.zip
             echo "=== bundle contents (top level) ==="
             ls