refactor: split flat core into capability packages, layer the conversations service, English defaults for every model-facing text

tests/test_envelope.py

@@ -5,12 +5,15 @@ from pathlib import Path
 
 from test_conversations import ScriptedClient, World, world
 
-from beaver_gateway.core.conversations import UserSaid
-from beaver_gateway.core.envelope import HEADER, Envelope, RecallContext, render
-from beaver_gateway.core.watch import Change, VaultWatch, WatchRules
+from beaver_gateway.conversations.service import UserSaid
+from beaver_gateway.conversations.envelope import Envelope, RecallContext, render
+from beaver_gateway.conversations.texts import EnvelopeTexts
+from beaver_gateway.vault.watch import Change, VaultWatch, WatchRules
 
 __all__ = ["world"]
 
+HEADER = EnvelopeTexts().header
+
 RULES = WatchRules(
     full=("дни/{today}.md",),
     names=("дни/*", "люди/*", "мета/бобер/*"),
@@ -88,11 +91,11 @@ def test_envelope_respects_ceilings_and_names_only_window() -> None:
     lines = text.splitlines()
     assert lines[0] == HEADER
     assert "(Warsaw)" in lines[1]
-    assert lines[2].startswith("vault, изменено со старта: ")
+    assert lines[2].startswith("vault, changed since start: ")
     assert f"дни/{today}.md (+200)" in lines[2]
     assert "люди/Петя.md (+50)" in lines[2]
     assert sum(1 for line in lines if line.startswith("+ ")) == 31
-    assert "+ … ещё 170" in lines
+    assert "+ … 170 more" in lines
     assert len(lines) <= 120
     append(diary, "- ещё одна\n")
     watch.note(diary)
@@ -122,8 +125,8 @@ def test_render_hits_total_ceiling() -> None:
     )
     lines = text.splitlines()
     assert len(lines) <= 120
-    assert "… (потолок конверта)" in lines
-    assert lines[1] == "время: 2026-08-26 13:04 (Warsaw)"
+    assert "… (envelope cap)" in lines
+    assert lines[1] == "time: 2026-08-26 13:04 (Warsaw)"
 
 
 async def test_master_turn_gets_envelope_after_text_and_before_injects(
@@ -142,12 +145,12 @@ async def test_master_turn_gets_envelope_after_text_and_before_injects(
     assert head == "hello"
     assert rest.startswith(HEADER)
     assert "люди/Прохор.md (+1)" in rest
-    assert rest.index("[инжекты") > rest.index(HEADER)
+    assert rest.index("[injects") > rest.index(HEADER)
     branch = await world.conversations.spawn(
         kind="branch", parent=master, seed="brief", text="do X"
     )
     await world.settle(branch, 1)
-    assert "[конверт" not in ScriptedClient.instances[-1].prompts[0]
+    assert "[envelope" not in ScriptedClient.instances[-1].prompts[0]
     await asyncio.sleep(0)
 
 
@@ -187,7 +190,7 @@ async def test_recall_lines_follow_the_vault_block_and_reach_branches(
     branch_prompt = ScriptedClient.instances[-1].prompts[0]
     assert "про Прохор подробнее\n\n" + HEADER in branch_prompt
     assert branch_prompt.endswith(f"{HEADER}\n👤 Прохор - карточка `люди/Прохор.md`")
-    assert "vault, изменено" not in branch_prompt
+    assert "vault, changed" not in branch_prompt
     # the first branch turn carries the seed line above the text
     assert seen[-1][0] == "branch" and seen[-1][1].endswith("про Прохор подробнее")
     assert noted[-1].kind == "branch"