Add logging and fix /agents/ route error

AGENTS.md

@@ -1,42 +1,20 @@
 # Nerd Monitor - Agent Guidelines
 
 ## Build & Test Commands
+- **Generate templates**: `make templ`
+- **Build**: `make build` (server + agent) or `make build-server`/`make build-agent`
+- **Cross-platform**: `make build-all`
+- **Clean**: `make clean`
+- **Test all**: `go test ./...`
+- **Test single**: `go test -run TestName ./package`
+- **Format**: `gofmt -w ./cmd ./internal ./views`
 
-```bash
-# Generate Templ templates (required before building)
-make templ
-
-# Build server and agent for current OS
-make build
-
-# Build individual components
-make build-server
-make build-agent
-
-# Build for all platforms (Linux, macOS, Windows)
-make build-all
-
-# Clean build artifacts
-make clean
-```
-
-Note: This Go 1.21 project uses Templ for templating. Always run `make templ` before building.
+Note: Go 1.23+ project using Templ templating. Run `make templ` before building.
 
 ## Code Style Guidelines
-
-**Imports**: Standard library first, then third-party packages, then internal modules. Organize alphabetically within each group.
-
-**Formatting & Types**: Use `gofmt` standards. Explicit struct field comments for exported types. Prefer `error` return values (no panic for recoverable errors).
-
-**Naming**: CamelCase for exported symbols, lowercase for unexported. Receiver names as single letters (e.g., `(m *Manager)`). Constants use ALL_CAPS_SNAKE_CASE.
-
-**Error Handling**: Define sentinel errors in dedicated files (e.g., `auth/errors.go`). Check errors explicitly; use `http.Error(w, "message", status)` for HTTP responses. Wrap errors with context when needed.
-
-**Project Structure**: 
-- `cmd/`: Executable entry points (server, agent)
-- `internal/`: Packages (api, auth, stats, store, ui)
-- `views/`: Templ templates (*.templ files)
-
-**Concurrency**: Use `sync.RWMutex` for shared state. Always defer lock releases. Keep critical sections small.
-
-**HTTP**: Use Chi router. Handlers follow `func (h *Handler) Name(w http.ResponseWriter, r *http.Request)`. Set Content-Type headers explicitly. Validate query parameters early and return 400/404 appropriately.
+- **Imports**: stdlib → third-party → internal (alphabetical within groups)
+- **Formatting**: `gofmt` standards, explicit exported struct comments
+- **Naming**: CamelCase exports, lowercase unexported, single-letter receivers (e.g., `(h *Handler)`)
+- **Error Handling**: Explicit checks, `http.Error()` for HTTP, contextual wrapping
+- **Concurrency**: `sync.RWMutex` for shared state, defer lock releases, small critical sections
+- **HTTP**: Chi router, `func (h *Handler) Method(w http.ResponseWriter, r *http.Request)`, set Content-Type, validate early