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-linux.yml

@@ -40,11 +40,11 @@ jobs:
     # carry the `ubuntu-latest` label, so this works on either platform.
     runs-on: ubuntu-latest
     container:
-      # Cake Labs' prebuilt build image with Flutter 3.32.0, Go 1.24.1, NDK r28,
+      # Cake Labs' prebuilt build image with Flutter 3.41.9, Go 1.24.1, NDK r28,
       # Rust nightly, and all the C++ build deps (boost, openssl, libsodium,
       # libzmq, unbound, icu) preinstalled. Saves us from doing the simplybs
       # source-bootstrap dance that ate 9GB on jw-laptop.
-      image: ghcr.io/cake-tech/cake_wallet:debian13-flutter3.32.0-ndkr28-go1.24.1-ruststablenightly
+      image: ghcr.io/cake-tech/cake_wallet:debian13-flutter3.41.9-ndkr28-go1.24.1-ruststablenightly
       env:
         BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
         # cake_wallet build profile name, retained from upstream — internal
@@ -122,8 +122,12 @@ jobs:
           echo "monero_c TAG: $MONERO_C_TAG"
           mkdir -p "scripts/monero_c/release/$MONERO_C_TAG"
           pushd "scripts/monero_c/release/$MONERO_C_TAG"
-            wget -q https://github.com/MrCyjaneK/monero_c/releases/download/v0.18.4.6-RC1/release-bundle.zip
+            wget -q https://github.com/MrCyjaneK/monero_c/releases/download/v0.18.4.6-RC2/release-bundle.zip
             unzip -q release-bundle.zip
+            # RC2 nests everything under an inner v0.18.4.6-*/ dir; strip it.
+            shopt -s nullglob
+            for inner in v0.18.4.6-*/; do mv "$inner"* . && rmdir "$inner"; done
+            shopt -u nullglob
             rm release-bundle.zip
             ls x86_64-linux-gnu/
           popd
@@ -205,7 +209,7 @@ jobs:
           awk -F"'" '/^const (trocador[A-Za-z]*) = / { split($1, a, " "); v = (length($2) ? "set (" length($2) " chars)" : "EMPTY"); print a[2] ": " v }' lib/.secrets.g.dart   # lengths only; values never reach the log
 
       # Initialize Flutter SDK once before parallel-ish work happens. flutter
-      # precache for Flutter 3.32.0 hits a 404 on flutter_gpu.zip (asset not
+      # precache for Flutter 3.41.9 hits a 404 on flutter_gpu.zip (asset not
       # actually published at the path Flutter constructs); the `|| true`
       # absorbs that — desktop Linux build doesn't need flutter_gpu.
       - name: Initialize Flutter SDK