initial commit — cassandra v0.1

Containerised macro-strategy dashboard: 4-panel web UI (indicators,
portfolio, flash news, AI strategic log), MariaDB store, hourly
ingestion jobs, OpenRouter-backed AI analysis.

Ports the four prototype scripts in the parent dir (market_pulse,
flash_news, trading212, strategic_log) into async services backed by a
persistent DB and served via FastAPI + Jinja2 + HTMX. APScheduler runs
as a separate compose service for crash-safety and easier restarts.

Portfolio composition + position names come live from Trading 212;
news per-ticker headlines reuse those names. Tone (NOVICE/INTERMEDIATE/
PRO) and analysis style (DRY/SPECULATIVE) are env-configurable and
stored on each log row so historical entries show what produced them.

Default model is deepseek/deepseek-v4-flash (overridable via env).
Light/dark theme toggle, sans-serif for prose surfaces, monospace for
data. Bearer-token auth, OpenRouter monthly cost cap, RSS feeds auto-
disabled on consecutive failures.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_openrouter_prompt.py

@@ -0,0 +1,45 @@
+"""build_user_prompt is the heart of the AI log — verify shape."""
+from __future__ import annotations
+
+import pytest
+
+pytest.importorskip("httpx")
+pytest.importorskip("tenacity")
+pytest.importorskip("pydantic_settings")
+
+from datetime import datetime, timezone
+
+from app.services.openrouter import SYSTEM_PROMPT, build_user_prompt
+
+
+def test_system_prompt_has_voice_anchors():
+    # Tripwires for prompt regressions.
+    for marker in ["Objective", "Lens", "Discipline", "watch list"]:
+        assert marker in SYSTEM_PROMPT
+
+
+def test_build_user_prompt_includes_anchor_and_reference():
+    out = build_user_prompt(
+        today=datetime(2026, 5, 15, tzinfo=timezone.utc),
+        anchor="2026-03-04",
+        quotes_by_group={"equity": [{"symbol": "^GSPC", "label": "S&P 500"}]},
+        headlines_by_bucket={"world": [{"when": "2026-05-15T10:00", "source": "BBC", "title": "x"}]},
+        reference_line="S&P 7501 · VIX 18",
+    )
+    assert "2026-05-15" in out
+    assert "Anchor reference date: 2026-03-04" in out
+    assert "S&P 7501" in out
+    assert "WORLD" in out
+    assert "^GSPC" in out
+
+
+def test_build_user_prompt_omits_empty_buckets():
+    out = build_user_prompt(
+        today=datetime(2026, 5, 15, tzinfo=timezone.utc),
+        anchor=None,
+        quotes_by_group={},
+        headlines_by_bucket={"world": [], "tech": [{"when": "2026-05-15T10:00",
+                                                    "source": "X", "title": "AI thing"}]},
+    )
+    assert "TECH" in out
+    assert "WORLD" not in out