Phase 2: EVE SSO auth + read-only account tools

Add PKCE OAuth2 login against EVE SSO with an encrypted, auto-refreshing
token store, driven by `familiar login` / `status` / `logout` CLI commands.
The MCP server gains authenticated account tools:

- account_status, get_wallet, get_skills, get_skill_queue
- get_location, get_clones, get_assets (paginated)

ESI client extended with Bearer auth and X-Pages pagination. 51 tests
(auth + account mocked), coverage 88%. Client id/callback/scopes are
env-overridable; refresh token Fernet-encrypted on disk.

Closes #7

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/test_account.py

@@ -0,0 +1,102 @@
+"""Authenticated account tools (auth mocked, ESI mocked)."""
+
+import asyncio
+
+import httpx
+import pytest
+
+from familiar import account, auth
+from familiar.server import mcp
+from conftest import route
+
+
+@pytest.fixture
+def fake_auth(monkeypatch):
+    async def _stub():
+        return "fake-token", 99
+
+    monkeypatch.setattr(auth, "get_auth", _stub)
+    return 99
+
+
+def test_get_wallet(mock_esi, fake_auth):
+    mock_esi(lambda req: httpx.Response(200, json=1234567.89))
+    result = asyncio.run(account.get_wallet())
+    assert result["character_id"] == 99
+    assert result["balance"] == 1234567.89
+
+
+def test_get_skills_summarizes(mock_esi, fake_auth):
+    body = {"total_sp": 5_000_000, "unallocated_sp": 10_000, "skills": [{}, {}, {}]}
+    mock_esi(lambda req: route(req, {"/skills/": body}))
+    result = asyncio.run(account.get_skills())
+    assert result["total_sp"] == 5_000_000
+    assert result["skills_trained"] == 3
+
+
+def test_get_skill_queue_limits(mock_esi, fake_auth):
+    queue = [
+        {"skill_id": i, "finished_level": 5, "queue_position": i, "finish_date": "2026"}
+        for i in range(5)
+    ]
+    mock_esi(lambda req: route(req, {"/skillqueue/": queue}))
+    result = asyncio.run(account.get_skill_queue(limit=2))
+    assert result["in_queue"] == 5
+    assert len(result["upcoming"]) == 2
+
+
+def test_get_location_merges_endpoints(mock_esi, fake_auth):
+    fixtures = {
+        "/location/": {"solar_system_id": 30000142, "station_id": 60003760},
+        "/ship/": {"ship_type_id": 670, "ship_name": "My Capsule"},
+        "/online/": {"online": True, "last_login": "2026-06-27T00:00:00Z"},
+    }
+    mock_esi(lambda req: route(req, fixtures))
+    result = asyncio.run(account.get_location())
+    assert result["solar_system_id"] == 30000142
+    assert result["ship_name"] == "My Capsule"
+    assert result["online"] is True
+
+
+def test_get_clones(mock_esi, fake_auth):
+    fixtures = {
+        "/clones/": {"home_location": {"location_id": 60003760}, "jump_clones": [{}, {}]},
+        "/implants/": [10000, 10001],
+    }
+    mock_esi(lambda req: route(req, fixtures))
+    result = asyncio.run(account.get_clones())
+    assert result["jump_clones"] == 2
+    assert result["active_implants"] == [10000, 10001]
+
+
+def test_get_assets_paginates(mock_esi, fake_auth):
+    # Two pages of assets; the client should follow X-Pages and concatenate.
+    def handler(req):
+        page = req.url.params.get("page", "1")
+        if page == "1":
+            return httpx.Response(
+                200,
+                json=[{"type_id": 34, "quantity": 1, "location_id": 1}],
+                headers={"X-Pages": "2"},
+            )
+        return httpx.Response(
+            200,
+            json=[{"type_id": 35, "quantity": 2, "location_id": 1}],
+            headers={"X-Pages": "2"},
+        )
+
+    mock_esi(handler)
+    result = asyncio.run(account.get_assets(limit=20))
+    assert result["total_stacks"] == 2
+    assert {a["type_id"] for a in result["sample"]} == {34, 35}
+
+
+def test_account_status_delegates(monkeypatch):
+    monkeypatch.setattr(auth, "status", lambda: {"authenticated": True, "character_id": 1})
+    result = asyncio.run(account.account_status())
+    assert result["authenticated"] is True
+
+
+def test_account_tools_registered():
+    tools = {t.name for t in asyncio.run(mcp.list_tools())}
+    assert {"get_wallet", "get_skills", "get_location", "get_assets", "account_status"} <= tools