feat: SSE para chat desktop, rate limiting, retry, testes e atualizacao de stack

- Implementa Server-Sent Events (SSE) para chat no desktop com fallback HTTP
- Adiciona rate limiting nas APIs de chat (poll, messages, sessions)
- Adiciona retry com backoff exponencial para mutations
- Cria testes para modulo liveChat (20 testes)
- Corrige testes de SMTP (unit tests para extractEnvelopeAddress)
- Adiciona indice by_status_lastActivity para cron de sessoes inativas
- Atualiza stack: Bun 1.3.4, React 19, recharts 3, noble/hashes 2, etc

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/desktop/src-tauri/Cargo.lock

@@ -62,11 +62,13 @@ version = "0.1.0"
 dependencies = [
  "base64 0.22.1",
  "chrono",
+ "futures-util",
  "get_if_addrs",
  "hostname",
  "once_cell",
  "parking_lot",
  "reqwest",
+ "reqwest-eventsource",
  "serde",
  "serde_json",
  "sha2",
@@ -985,6 +987,17 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "eventsource-stream"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74fef4569247a5f429d9156b9d0a2599914385dd189c539334c625d8099d90ab"
+dependencies = [
+ "futures-core",
+ "nom",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "fastrand"
 version = "2.3.0"
@@ -1159,6 +1172,12 @@ version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f90f7dce0722e95104fcb095585910c0977252f286e354b5e3bd38902cd99988"
 
+[[package]]
+name = "futures-timer"
+version = "3.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f288b0a4f20f9a56b5d1da57e2227c661b7b16168e2f72365f57b63326e29b24"
+
 [[package]]
 name = "futures-util"
 version = "0.3.31"
@@ -2166,6 +2185,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "minisign-verify"
 version = "0.2.4"
@@ -2269,6 +2294,16 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
 
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
 [[package]]
 name = "notify-rust"
 version = "4.11.7"
@@ -3364,6 +3399,22 @@ dependencies = [
  "webpki-roots",
 ]
 
+[[package]]
+name = "reqwest-eventsource"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "632c55746dbb44275691640e7b40c907c16a2dc1a5842aa98aaec90da6ec6bde"
+dependencies = [
+ "eventsource-stream",
+ "futures-core",
+ "futures-timer",
+ "mime",
+ "nom",
+ "pin-project-lite",
+ "reqwest",
+ "thiserror 1.0.69",
+]
+
 [[package]]
 name = "ring"
 version = "0.17.14"