App rework

.gitignore

@@ -22,3 +22,6 @@ client-config.json
 # Editor / agent local state
 .obsidian/
 .claude/
+
+# Stray local builds (go build ./... drops binaries in the repo root)
+/*.exe

Makefile

@@ -1,11 +1,18 @@
-.PHONY: build build-cross build-android test test-router lint vet clean tidy install-browser
+.PHONY: build build-desktop build-cross build-android test test-router lint vet clean tidy install-browser
 
 GO ?= go
 GOFLAGS ?= -trimpath
 LDFLAGS ?= -s -w
 BUILD_DIR ?= dist
 DESKTOP_TARGETS ?= linux/amd64 linux/arm64 darwin/amd64 darwin/arm64 windows/amd64 windows/arm64
 ANDROID_TARGETS ?= android/arm64
+HOST_GOOS := $(shell $(GO) env GOOS)
+DESKTOP_EXT :=
+DESKTOP_LDFLAGS = $(LDFLAGS)
+ifeq ($(HOST_GOOS),windows)
+DESKTOP_EXT := .exe
+DESKTOP_LDFLAGS = -H windowsgui $(LDFLAGS)
+endif
 
 # Versioning baked at build time
 VERSION ?= $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
@@ -20,6 +27,11 @@ build:
 	$(GO) build $(GOFLAGS) -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/gocoon          ./cmd/gocoon
 	$(GO) build $(GOFLAGS) -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/gocoon-runner   ./cmd/gocoon-runner
 
+build-desktop:
+	mkdir -p $(BUILD_DIR)
+	$(GO) build $(GOFLAGS) -tags desktop -ldflags="$(DESKTOP_LDFLAGS)" -o $(BUILD_DIR)/gocoon-desktop$(DESKTOP_EXT) ./cmd/gocoon
+	$(GO) build $(GOFLAGS) -ldflags="$(LDFLAGS)" -o $(BUILD_DIR)/gocoon-runner$(DESKTOP_EXT) ./cmd/gocoon-runner
+
 build-cross:
 	@set -e; for target in $(DESKTOP_TARGETS); do \
 		goos=$${target%/*}; goarch=$${target#*/}; ext=""; \

README.md

@@ -4,6 +4,8 @@ Pure-Go COCOON client. Run decentralized AI inference on TON without Telegram's
 C++ runner build chain.
 
 - Standalone CLI with an **OpenAI-compatible local HTTP API**
+- Built-in local **wallet + chat UI** (`gocoon ui`) and desktop app
+  (`gocoon-desktop`)
 - OpenAI **function calling** support (`tools` array, `tool_calls` response)
 - Full on-chain payment flow: stake → chat → close → withdraw
 - Static cross-platform binaries (linux / darwin / windows × amd64 / arm64,
@@ -22,11 +24,34 @@ make build
 export PATH="$PWD/dist:$PATH"
 ```
 
-`make build-cross` and `make build-android` produce release-grade static
+`make build-desktop` produces a host desktop app binary (`gocoon-desktop.exe`
+on Windows, `gocoon-desktop` on macOS/Linux) plus `gocoon-runner`.
+`make build-cross` and `make build-android` produce release-grade static CLI
 binaries for every supported target.
 
 ## Quick Start
 
+For the local UI:
+
+```bash
+gocoon ui --dir ./gocoon-data
+```
+
+The UI creates the wallet/config bundle, shows the recovery phrase and full
+backup JSON once, shows the funding address, starts the local runner, lists
+models once a proxy session is ready, and provides a simple chat screen.
+
+For a standalone desktop window instead of a browser tab:
+
+```bash
+gocoon-desktop
+```
+
+Keep `gocoon-runner` next to `gocoon-desktop`; the desktop app starts it when
+you press **Connect to Cocoon**.
+
+For CLI-only setup:
+
 ```bash
 gocoon init --dir ./gocoon-data
 ```
@@ -69,7 +94,7 @@ gocoon wallet withdraw \
 
 | Path                | Role                                                     |
 | ------------------- | -------------------------------------------------------- |
-| `cmd/gocoon`        | Standalone CLI                                           |
+| `cmd/gocoon`        | Standalone CLI and local web UI                          |
 | `cmd/gocoon-runner` | Local runner, HTTP control plane on `127.0.0.1:10000`    |
 | `pkg/cocoon`        | Client library: sessions, inference, payments, discovery |
 | `pkg/contracts`     | COCOON root / client / wallet contract helpers           |