feat(mcp): page compte Connecteur MCP + instructions clients (scope B #111)

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

tests/mcp/test_account_page.py

@@ -0,0 +1,26 @@
+def test_section_connecteur_mcp_present():
+    from src.pages._compte_shell import SECTIONS
+
+    keys = {s["key"]: s for s in SECTIONS}
+    assert "mcp" in keys
+    assert keys["mcp"]["label"] == "Connecteur MCP"
+    assert keys["mcp"]["href"] == "/compte/mcp"
+    assert keys["mcp"]["require_subscription"] is True
+
+
+def test_page_module_registers_and_builds_client_instructions():
+    # importe l'app pour la découverte use_pages en contexte propre
+    from src.app import app  # noqa: F401
+    from src.pages.compte import mcp as mcp_page
+
+    # helper pur : construit les 4 blocs d'instructions clients
+    blocks = mcp_page.client_instructions(
+        "https://colibre.fr/_mcp", "colibre_TESTTOKEN"
+    )
+    text = str(blocks)
+    assert "colibre_TESTTOKEN" in text
+    assert "https://colibre.fr/_mcp" in text
+    for client_name in ("Claude", "Gemini", "Mistral", "ChatGPT"):
+        assert client_name in text
+    # caveat ChatGPT (OAuth / itération future)
+    assert "OAuth" in text