Initial commit: LlamaLink Go rewrite

Complete rewrite from Python/FastAPI to Go/Gin:
- Go backend: auth (API keys + bcrypt), llama.cpp subprocess manager,
  hot-swap multi-model, rate limiting, quota system, webhooks
- Vue 3 SPA admin panel (src/) with Tailwind CSS
- Deployment: Docker multi-stage, docker-compose, nginx, systemd
- GORM/SQLite models: ApiKey, Model, UsageLog, Quota, Webhook
- REST API: /api/v1/admin/* (keys, models, chat, usage, health)
- Embedded frontend via go:embed (build output at web/dist/)

Removed legacy Python artifacts (app/, tests/, pyproject.toml, etc.)

internal/llama/state.go

@@ -0,0 +1,34 @@
+package llama
+
+import "time"
+
+type Status string
+
+const (
+	StatusStopped  Status = "stopped"
+	StatusLoading  Status = "loading"
+	StatusReady    Status = "ready"
+	StatusSwapping Status = "swapping"
+	StatusFailed   Status = "failed"
+)
+
+type State struct {
+	CurrentModel   string     `json:"current_model"`
+	TargetModel    string     `json:"target_model,omitempty"`
+	Status         Status     `json:"status"`
+	PID            int        `json:"pid,omitempty"`
+	LoadedAt       *time.Time `json:"loaded_at,omitempty"`
+	LastError      string     `json:"last_error,omitempty"`
+	SwapStartedAt  *time.Time `json:"swap_started_at,omitempty"`
+	SwapInProgress bool       `json:"swap_in_progress"`
+}
+
+type ModelInfo struct {
+	Name        string
+	ModelPath   string
+	Alias       string
+	CtxSize     int
+	NGPULayers  int
+	ExtraArgs   map[string]interface{}
+	IsDefault   bool
+}