Add teabot daemon implementation

teabot watches Gitea repos and dispatches one-shot Claude Code sessions in
Docker containers to work issues and review PRs, acting as configurable bot
personalities.

Claude-Session: https://claude.ai/code/session_015ur3i7D2azsMAWTSVABApv

internal/cli/run.go

@@ -0,0 +1,97 @@
+package cli
+
+import (
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/spf13/cobra"
+
+	"git.unkin.net/unkin/teabot/internal/config"
+	"git.unkin.net/unkin/teabot/internal/dispatch"
+	"git.unkin.net/unkin/teabot/internal/docker"
+	"git.unkin.net/unkin/teabot/internal/gitea"
+	"git.unkin.net/unkin/teabot/internal/state"
+)
+
+func newRunCmd() *cobra.Command {
+	var (
+		once     bool
+		logJSON  bool
+		logLevel string
+	)
+	cmd := &cobra.Command{
+		Use:   "run",
+		Short: "Run the teabot daemon (foreground)",
+		Long: "run starts teabot in the foreground: it polls the configured repos on an\n" +
+			"interval and dispatches Claude sessions. Use --once for a single poll cycle\n" +
+			"(handy for testing). This command is what the systemd user unit executes.",
+		RunE: func(cmd *cobra.Command, _ []string) error {
+			logger := newLogger(logJSON, logLevel)
+
+			cfg, err := config.Load(configPath)
+			if err != nil {
+				return err
+			}
+
+			store, err := state.New(cfg.StateDirOrDefault())
+			if err != nil {
+				return err
+			}
+
+			// One Gitea client, authenticated as the first personality, is
+			// enough for read-only polling; actions happen inside containers as
+			// the per-event personality.
+			pollTok := cfg.Personalities[0].Token
+			client := gitea.NewClient(cfg.GiteaURL, pollTok)
+
+			runner := docker.NewDockerRunner()
+			runner.Stdout = os.Stderr
+
+			d := dispatch.New(cfg, store, client, runner, logger)
+
+			logger.Info("teabot starting",
+				"repos", cfg.Repos,
+				"personalities", len(cfg.Personalities),
+				"poll_interval", cfg.PollInterval.String(),
+				"max_concurrent", cfg.MaxConcurrent,
+				"job_image", cfg.JobImage,
+				"once", once)
+
+			if once {
+				return d.PollOnce(cmd.Context(), true)
+			}
+
+			ctx, stop := signal.NotifyContext(cmd.Context(), syscall.SIGINT, syscall.SIGTERM)
+			defer stop()
+			return d.Run(ctx)
+		},
+	}
+	cmd.Flags().BoolVar(&once, "once", false, "run a single poll cycle then exit")
+	cmd.Flags().BoolVar(&logJSON, "log-json", false, "emit structured JSON logs")
+	cmd.Flags().StringVar(&logLevel, "log-level", "info", "log level: debug, info, warn, error")
+	return cmd
+}
+
+func newLogger(jsonOut bool, level string) *slog.Logger {
+	var lvl slog.Level
+	switch level {
+	case "debug":
+		lvl = slog.LevelDebug
+	case "warn":
+		lvl = slog.LevelWarn
+	case "error":
+		lvl = slog.LevelError
+	default:
+		lvl = slog.LevelInfo
+	}
+	opts := &slog.HandlerOptions{Level: lvl}
+	var h slog.Handler
+	if jsonOut {
+		h = slog.NewJSONHandler(os.Stderr, opts)
+	} else {
+		h = slog.NewTextHandler(os.Stderr, opts)
+	}
+	return slog.New(h)
+}