Merge feat/persona: in-voice 'How you talk' rewrite (anti-tic rules + exemplars)

Lands the persona voice rewrite onto the active line. Disjoint from the
poker ledger work (persona.py / personas/lyra.md / persona eval vs.
chat/poker + tests), so a clean no-conflict merge.

tests/test_persona.py

@@ -0,0 +1,49 @@
+"""Persona composition + voice guards. Run via `uv run pytest` FROM the worktree."""
+from __future__ import annotations
+
+from lyra import persona
+
+# core_prompt() char length on the pre-rewrite persona (measured 2026-07-08).
+# The rewrite must not bloat the always-on hot path past this.
+BASELINE_CORE_CHARS = 2878
+
+
+def _core() -> str:
+    persona._sections.cache_clear()  # file changed on disk since import
+    return persona.core_prompt()
+
+
+def test_right_now_is_not_in_the_always_on_core():
+    # Demoted out of _CORE: its content must no longer ride every turn.
+    assert "Right now" not in persona._CORE
+    assert "are coming" not in _core()            # the stale promise is gone from core
+    assert "player content library" not in _core()
+
+
+def test_right_now_section_still_exists_and_is_accurate():
+    rn = persona.section("Right now")
+    assert rn                                       # still a loadable situational section
+    assert "are coming" not in rn                   # stats/profiling are SHIPPED — no stale promise
+    assert "analyze_spot" in rn                     # names a real, current capability
+
+
+def test_how_you_talk_carries_the_anti_tic_rules():
+    core = _core().lower()
+    # The four tics, each named as a rule (anchor phrases from the rewrite):
+    assert "commit" in core                          # menu-instead-of-pick
+    assert "hand the verdict back" in core           # tag-question deferral
+    assert "don't reach for the instant silver lining" in core  # reassurance reflex
+    assert "disagree when you disagree" in core       # both-sides-ing / no-friction
+
+
+def test_how_you_talk_has_real_exemplars_not_just_traits():
+    core = _core()
+    # Lifted from her own best moments — concrete voice, not labels:
+    assert "type every semicolon" in core            # imposter-syndrome exemplar
+    assert "hold off on the cash game" in core        # fatigue/EV judgment exemplar
+
+
+def test_old_hedgy_trait_bullet_is_gone():
+    core = _core()
+    # the vague trait line the model nodded at and ignored
+    assert "you could consider folding" not in core