docs: translate all code comments to English (language policy)

Translate every Italian /// XML doc comment, <!-- --> XAML comment, and
// inline comment to English across all source files (Core, App, tests).
Add the language policy to CLAUDE.md (conversation Italian; all code
and docs English). Update one test assertion that checked an Italian
exception message that was also translated.

src/Core/Chain/ChainProfiles.cs

@@ -1,8 +1,8 @@
 namespace PalladiumWallet.Core.Chain;
 
 /// <summary>
-/// I tre profili di rete del wallet (blueprint §3). Valori mainnet verificati
-/// contro il sorgente del nodo (chainparams.cpp / pow.cpp) secondo il blueprint.
+/// The wallet's three network profiles (blueprint §3). Mainnet values verified
+/// against the node source (chainparams.cpp / pow.cpp) per the blueprint.
 /// </summary>
 public static class ChainProfiles
 {
@@ -12,11 +12,11 @@ public static class ChainProfiles
         NetName = "mainnet",
         CoinUnit = "PLM",
         WifPrefix = 0x80,
-        AddrP2pkh = 55,   // indirizzi che iniziano con 'P'
-        AddrP2sh = 5,     // indirizzi che iniziano con '3'
+        AddrP2pkh = 55,   // addresses starting with 'P'
+        AddrP2sh = 5,     // addresses starting with '3'
         SegwitHrp = "plm",
         Bolt11Hrp = "plm",
-        // La mainnet riusa la genesi di Bitcoin (blueprint §3).
+        // Mainnet reuses Bitcoin's genesis (blueprint §3).
         GenesisHash = "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",
         DefaultTcpPort = 50001,
         DefaultSslPort = 50002,
@@ -33,11 +33,11 @@ public static class ChainProfiles
             [ScriptKind.WrappedSegwitMultisig] = new(0x0295b005, 0x0295b43f), // Yprv / Ypub
             [ScriptKind.NativeSegwit] = new(0x04b2430c, 0x04b24746),          // zprv / zpub
             [ScriptKind.NativeSegwitMultisig] = new(0x02aa7a99, 0x02aa7ed3),  // Zprv / Zpub
-            // Nessun SLIP-132 per P2TR: il contesto è dato dal path m/86'/…
+            // No SLIP-132 for P2TR: the context is given by the m/86'/… path
             [ScriptKind.Taproot] = new(0x0488ade4, 0x0488b21e),               // xprv / xpub (BIP32 standard)
         },
-        // Server di indicizzazione noti per il primo contatto (§3/§9); altri
-        // peer vengono scoperti via server.peers.subscribe.
+        // Known indexing servers for first contact (§3/§9); other
+        // peers are discovered via server.peers.subscribe.
         BootstrapServers =
         [
             new ServerEndpoint("173.212.224.67", 50001, 50002),
@@ -45,7 +45,7 @@ public static class ChainProfiles
             new ServerEndpoint("66.94.115.80", 50001, 50002),
             new ServerEndpoint("89.117.149.130", 50001, 50002),
         ],
-        // TODO: popolare con [hash, bits] reali della catena (§7.3) prima della release.
+        // TODO: populate with the chain's real [hash, bits] (§7.3) before release.
         Checkpoints = [],
     };
 
@@ -58,15 +58,15 @@ public static class ChainProfiles
         AddrP2sh = 115,
         SegwitHrp = "tplm",
         Bolt11Hrp = "tplm",
-        // TODO: verificare contro chainparams.cpp del nodo (il blueprint non la riporta;
-        // qui si assume la genesi di Bitcoin testnet3, da confermare).
+        // TODO: verify against the node's chainparams.cpp (the blueprint does not report it;
+        // here Bitcoin testnet3 genesis is assumed, to be confirmed).
         GenesisHash = "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943",
         NodeP2pPort = 12333,
         Bip44CoinType = 1,
         ExtKeyHeaders = new Dictionary<ScriptKind, ExtKeyHeaders>
         {
-            // tprv/tpub dal blueprint; le varianti SLIP-132 testnet (u/v/U/V) sono
-            // i valori standard Electrum.
+            // tprv/tpub from the blueprint; the testnet SLIP-132 variants (u/v/U/V) are
+            // the standard Electrum values.
             [ScriptKind.Legacy] = new(0x04358394, 0x043587cf),                // tprv / tpub
             [ScriptKind.WrappedSegwit] = new(0x044a4e28, 0x044a5262),         // uprv / upub
             [ScriptKind.WrappedSegwitMultisig] = new(0x024285b5, 0x024289ef), // Uprv / Upub
@@ -84,7 +84,7 @@ public static class ChainProfiles
         NetName = "regtest",
         SegwitHrp = "rplm",
         Bolt11Hrp = "rplm",
-        // TODO: verificare contro chainparams.cpp del nodo (assunta genesi regtest Bitcoin).
+        // TODO: verify against the node's chainparams.cpp (Bitcoin regtest genesis assumed).
         GenesisHash = "0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206",
         NodeP2pPort = 28444,
         Checkpoints = [],