feat: Absender/Titel frei wählbar, kein "Notruf"-Default mehr (0.1.2)

"Notruf" war als Library/CLI-Default falsch — das gehört in die Bridge-Config,
nicht ins Allzweck-Tool. Jetzt:

- kein eingebauter Default-Absender; ohne Angabe nutzt seven.io den
  Kontostandard-Absender (send_sms lässt "from" dann weg)
- CLI --from für SMS (Absender/Titel) und Voice (Caller-ID); zusätzlich
  $SEVEN_SMS_FROM / $SEVEN_VOICE_FROM als persistenter Default
- Tests: Default ohne Absender, per-call-Override, CLI --from + Env (19 gesamt)
- README: Absender/Titel dokumentiert

Die Bridge übergibt sms_from="Notruf" weiterhin explizit -> Voice Assistant
unverändert.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_cli.py

@@ -51,3 +51,27 @@ def test_cli_missing_key(monkeypatch, capsys):
     rc = cli.main(["sms", "--to", "+49", "--text", "Hi"])
     assert rc == 2
     assert "Konfig-Fehler" in capsys.readouterr().err
+
+
+def test_cli_sms_from_flag(monkeypatch):
+    monkeypatch.delenv("SEVEN_SMS_FROM", raising=False)
+    cap = []
+    _patch(monkeypatch, cap)
+    cli.main(["--api-key", "k", "sms", "--to", "+49", "--text", "Hi", "--from", "Firma"])
+    assert cap[0]["data"]["from"] == "Firma"
+
+
+def test_cli_sms_no_from_by_default(monkeypatch):
+    monkeypatch.delenv("SEVEN_SMS_FROM", raising=False)
+    cap = []
+    _patch(monkeypatch, cap)
+    cli.main(["--api-key", "k", "sms", "--to", "+49", "--text", "Hi"])
+    assert "from" not in cap[0]["data"]
+
+
+def test_cli_sms_from_env(monkeypatch):
+    monkeypatch.setenv("SEVEN_SMS_FROM", "EnvAbs")
+    cap = []
+    _patch(monkeypatch, cap)
+    cli.main(["--api-key", "k", "sms", "--to", "+49", "--text", "Hi"])
+    assert cap[0]["data"]["from"] == "EnvAbs"

tests/test_client.py

@@ -54,6 +54,21 @@ def test_voice_no_ssml(monkeypatch):
     assert cap[0]["data"]["text"] == "roh"
 
 
+def test_send_sms_default_omits_sender(monkeypatch):
+    # Ohne sms_from kein "from" -> seven.io nutzt den Kontostandard-Absender
+    cap = []
+    _patch_post(monkeypatch, cap, FakeResp(payload={"success": "100"}))
+    SevenClient("key").send_sms("+49", "Hi")
+    assert "from" not in cap[0]["data"]
+
+
+def test_send_sms_sender_override(monkeypatch):
+    cap = []
+    _patch_post(monkeypatch, cap, FakeResp(payload={"success": "100"}))
+    SevenClient("key", sms_from="Firma").send_sms("+49", "Hi", sender="Aktion")
+    assert cap[0]["data"]["from"] == "Aktion"  # per-call schlägt Instanz-Default
+
+
 def test_failure_code(monkeypatch):
     cap = []
     _patch_post(monkeypatch, cap, FakeResp(payload={"success": "401"}))