feat: add per-user avatar seed regeneration with irreversible random avatar replacement

Implement a new `avatar_seed` column on the users table that overrides the username-based seed for Multiavatar generation. Introduce a null-safe `avatar_seed(user)` choke point in `avatar.py` that resolves `user.get("avatar_seed") or user.get("username")`, registered as a Jinja global so every render site (`_avatar_link.html`, `avatar_url(...)` calls, SEO `og_image`, issues ad-hoc dicts, devRant payload/PNG) propagates a regenerated seed. Add `POST /profile/{username}/regenerate-avatar` endpoint (owner-or-admin only) that writes a fresh `generate_uid()` to `avatar_seed`, invalidates the target's user cache, and audits `profile.avatar.regenerate`. The previous seed is overwritten and never stored, making regeneration irreversible. Document the feature in `AGENTS.md` and `README.md`, add the API endpoint to `docs_api.py`, and include the `regenerate_avatar` Devii tool in `CONFIRM_REQUIRED`.

tests/unit/schemas.py

@@ -133,3 +133,45 @@ def test_devii_delete_media_is_confirm_gated():
     blob = f"{delete.summary} {delete.description or ''}".lower()
     assert "soft delete" in blob
     assert "confirm" in blob
+
+
+def test_game_legacy_out_defaults():
+    from devplacepy.schemas import GameLegacyOut
+
+    out = GameLegacyOut(key="multiplier", name="Tech Debt Payoff", level=2, cost=5)
+    dumped = out.model_dump()
+    assert dumped["key"] == "multiplier"
+    assert dumped["level"] == 2
+    assert dumped["cost"] == 5
+    assert dumped["maxed"] is False
+
+
+def test_game_farm_out_exposes_stars_and_legacy():
+    from devplacepy.schemas import GameFarmOut, GameLegacyOut
+
+    farm = GameFarmOut(
+        stars=7,
+        steal_cooldown_seconds=120,
+        legacy=[GameLegacyOut(key="speed", level=1)],
+    )
+    dumped = farm.model_dump()
+    assert dumped["stars"] == 7
+    assert dumped["steal_cooldown_seconds"] == 120
+    assert dumped["legacy"][0]["key"] == "speed"
+
+
+def test_game_plot_out_steal_and_golden_fields():
+    from devplacepy.schemas import GamePlotOut
+
+    plot = GamePlotOut(
+        slot=0,
+        can_steal=True,
+        steal_coins=40,
+        steal_cooldown_seconds=600,
+        steal_reason="protected",
+        is_golden=True,
+    )
+    dumped = plot.model_dump()
+    assert dumped["steal_cooldown_seconds"] == 600
+    assert dumped["steal_reason"] == "protected"
+    assert dumped["is_golden"] is True