Initial ai typewriter implementation

tests/test_ai_client.py

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+from ai_typewriter.ai_client import ask_ai
+from ai_typewriter.config import AppConfig
+
+
+class FakeResponse:
+    def __init__(self, payload):
+        self.payload = payload
+    def raise_for_status(self):
+        return None
+    def json(self):
+        return self.payload
+
+
+def test_ollama_payload_contains_strict_system_prompt(monkeypatch):
+    seen = {}
+    def fake_post(url, json, timeout, **kwargs):
+        seen["url"] = url
+        seen["json"] = json
+        return FakeResponse({"message": {"content": "ok"}})
+    monkeypatch.setattr("ai_typewriter.ai_client.requests.post", fake_post)
+
+    result = ask_ai("texte", AppConfig(provider="ollama", model="m"))
+
+    assert result == "ok"
+    assert seen["url"].endswith("/api/chat")
+    assert seen["json"]["messages"][0]["role"] == "system"
+    assert "Uniquement la réponse brute" in seen["json"]["messages"][0]["content"]
+
+
+def test_gemini_payload(monkeypatch):
+    seen = {}
+    def fake_post(url, params, json, timeout):
+        seen["url"] = url
+        seen["params"] = params
+        seen["json"] = json
+        return FakeResponse({"candidates": [{"content": {"parts": [{"text": "brut"}]}}]})
+    monkeypatch.setattr("ai_typewriter.ai_client.requests.post", fake_post)
+
+    result = ask_ai("texte", AppConfig(provider="gemini", model="gemini-1.5-flash", api_key="k"))
+
+    assert result == "brut"
+    assert seen["params"] == {"key": "k"}
+    assert seen["url"].endswith("/v1beta/models/gemini-1.5-flash:generateContent")
+    assert "systemInstruction" in seen["json"]

tests/test_config.py

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+import json
+
+import pytest
+
+from ai_typewriter.config import load_config
+
+
+def test_load_default_config(tmp_path):
+    path = tmp_path / "config.json"
+    path.write_text(json.dumps({"provider": "ollama"}), encoding="utf-8")
+
+    cfg = load_config(path)
+
+    assert cfg.provider == "ollama"
+    assert cfg.hotkey == "ctrl+alt+a"
+    assert "Réponds directement" in cfg.system_prompt
+
+
+def test_reject_invalid_provider(tmp_path):
+    path = tmp_path / "config.json"
+    path.write_text(json.dumps({"provider": "bad"}), encoding="utf-8")
+
+    with pytest.raises(ValueError):
+        load_config(path)