Update changelog for v0.2.0

Author: hossein1376

CHANGELOG.md

@@ -1,4 +1,111 @@
 
+## v0.2.0
+
+### Session Resumption & Routing
+
+- **Session Resumption:** Implement full client/server session resumption flow
+  (`resume.go`) so that peers can reconnect and restore an existing session
+  without repeating the handshake. Ratchet state is persisted and restored
+  automatically.
+- **Ratchet State Serialization:** Add a `State` type with JSON
+  `Serialize`/`Deserialize` and `Restore` support in `pkg/ratchet`, enabling
+  durable persistence of Double Ratchet state across restarts.
+- **Router & Route Dispatching:** Introduce `Router` and `RouteDispatcher` with
+  middleware support (`router.go`). Add a `Route` enum and thread route
+  constants through `Transport.Send` and serialization for structured message
+  routing.
+- **Session Manager:** Add persistent `SessionManager` (`session.go`) with
+  handshake tracking, session save/load, `ListSessions`, and `CreatedAt`
+  preservation.
+
+### Desktop GUI (Bus)
+
+- **Fyne-based Chat GUI:** Add a cross-platform desktop client under `bus/`
+  built with Fyne, including chat UI, custom widgets, peer verification dialog,
+  and encrypted history viewer.
+- **Session List & In-App Logs:** Display active sessions and live application
+  logs inside the GUI.
+- **App Icons:** Ship platform-specific app icons for macOS, Windows, and Linux.
+- **Unified DB Path:** GUI and CLI now share a single default database path
+  (`~/.config/kamune/db`), overridable via `KAMUNE_DB_PATH`.
+- **File Logger:** Concurrent file logger (`bus/logger`) with `Init`, `Close`,
+  `Info`/`Warn`/`Error`/`Errorf` helpers, plus tests and benchmarks.
+
+### Daemon
+
+- **JSON-over-stdio Daemon:** Add `cmd/daemon` — a headless wrapper that
+  exposes Kamune operations over JSON-over-stdio IPC, with its own README and
+  tests.
+
+### Relay Improvements
+
+- **Refactored Relay:** Switch `attest.Identity` → `attest.Algorithm` across
+  the relay API and models. Improve client IP extraction and rate-limit error
+  responses.
+- **Queue Operations:** Extend relay storage API with queue ops
+  (`storage/queue.go`, `services/queue.go`) and a new queue HTTP handler, with
+  tests.
+- **Centralized Parsing:** Add `handlers/parse.go` to share base64 and
+  public-key parsing logic; remove duplicate code from handlers.
+
+### Storage
+
+- **`DeleteBatch`:** Remove multiple keys from a bucket in a single
+  transaction; missing buckets produce `ErrMissingBucket`, non-existent keys
+  are silently skipped.
+- **Bucket Listing Helpers:** Add `ListBuckets` and `ListKeys` queries to
+  `pkg/store`.
+- **`PubKeySessionIndex`:** New protobuf model and storage index mapping public
+  keys to session IDs.
+- **Peer `LastSeen`:** Track and persist the last-seen timestamp on every
+  `Peer`, with full test coverage.
+
+### Cryptography & Fingerprinting
+
+- **SHA-256 Fingerprint:** Add `fingerprint.Sum` (SHA-256) alongside the
+  existing emoji/hex helpers.
+- **stdlib `crypto/sha3`:** Replace `golang.org/x/crypto/sha3` with the Go
+  standard library `crypto/sha3` package.
+
+### Connection & Transport
+
+- **Conn Mutex:** Protect `Conn` fields with a mutex for safe concurrent use;
+  simplify `Option` type by removing its error return.
+- **Improved Dial/Serve/Resume:** Better error messages, cleaner control flow,
+  and style improvements across `dial.go`, `server.go`, and `resume.go`.
+
+### Configuration & Environment
+
+- **Environment Variables:** `KAMUNE_DB_PASSPHRASE` and `KAMUNE_DB_PATH` are
+  now preferred over interactive prompts and hard-coded paths.
+- **Default DB Directory:** `getDefaultDBDir()` resolves
+  `KAMUNE_DB_PATH` → `~/.config/kamune/db` → `./db`.
+
+### Testing & Quality
+
+- **Testify Adoption:** Replace manual `t.Error`/`t.Fatalf` checks with
+  `testify/assert` and `testify/require` across the entire test suite.
+- **Comprehensive Storage Tests:** Add tests covering peer timestamps, session
+  index persistence, expiry/cleanup, batch deletes, session update/info, and
+  resume checks.
+- **Per-Goroutine Done Channels:** Replace shared signal channels with
+  individual done channels in concurrent tests; capture and assert goroutine
+  errors after joining.
+- **New Fingerprint Tests:** Expand fingerprint coverage including `Hex`
+  empty-input edge case.
+
+### Miscellaneous
+
+- **Protobuf Regeneration:** Regenerate Go protobuf bindings (protoc v6.33.4);
+  add `Route` field to `SignedTransport`, update `box.proto` and `model.proto`.
+- **Logo & Assets:** Add `assets/logo.png`; move `demo.gif` from `.assets/` to
+  `assets/`.
+- **ECDH Private Key Marshal:** Fix ECDH private key marshalling in
+  `pkg/exchange`.
+- **README Updates:** Refresh feature checklist and fix demo image path.
+
+---
+
 ## v0.1.0 - Initial Release
 
 Kamune is a secure, peer-to-peer communication library for real-time messaging