helmd v2: Go-server som styr agent i tmux — REST+SSE, frågedetektor, fildelning, ntfy, CI-release

- tmux som sanningskälla (agentoberoende, överlever omstart via adoption)
- API: sessions, prompt, question/answer, keys, mode, config, shares, notify, events
- frågedetektor testad mot riktiga agy 1.1.9-dumpar + mock
- integrationstest: 26 tester i isolerad debian-container (scripts/run-integration.sh)
- e2e-verifierad mot riktig agy (trust-fråga -> svar -> prompt)
- .gitea/workflows/helmd-release.yaml -> rullande helmd-latest (x64+arm64)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

helmd/ntfy.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"strings"
+	"time"
+)
+
+type Ntfy struct {
+	cfg *NtfyConfig
+}
+
+// Publish posts a message to the configured ntfy server. Errors are
+// logged, never fatal — notifications must not take the server down.
+func (n *Ntfy) Publish(topic, title, message, priority string) error {
+	if !n.cfg.Enabled || n.cfg.Server == "" {
+		return nil
+	}
+	if topic == "" {
+		topic = n.cfg.Topic
+	}
+	url := strings.TrimRight(n.cfg.Server, "/") + "/" + topic
+	req, err := http.NewRequest("POST", url, strings.NewReader(message))
+	if err != nil {
+		return err
+	}
+	if title != "" {
+		req.Header.Set("X-Title", title)
+	}
+	if priority != "" {
+		req.Header.Set("X-Priority", priority)
+	}
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		log.Printf("ntfy: %v", err)
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		err := fmt.Errorf("ntfy: %s -> %s", topic, resp.Status)
+		log.Print(err)
+		return err
+	}
+	return nil
+}
+
+func (n *Ntfy) Question(session string, q *Question) {
+	if !n.cfg.NotifyOnQuestion {
+		return
+	}
+	var b strings.Builder
+	b.WriteString(q.Text)
+	for i, o := range q.Options {
+		b.WriteString("\n")
+		if o.Num > 0 {
+			fmt.Fprintf(&b, "%d. %s", o.Num, o.Label)
+		} else {
+			fmt.Fprintf(&b, "- %s", o.Label)
+		}
+		if i == q.Selected {
+			b.WriteString("  ←")
+		}
+	}
+	n.Publish("", "helm: "+session+" väntar på svar", b.String(), "high")
+}