Implement new storage design per issue #2

- Replace SQLite db module with file-based JSON storage in ~/.jigaido/
- Group bounties: ~/.jigaido/{group_id}/group.json
- User tracking: ~/.jigaido/{group_id}/user_{id}.json
- Personal bounties: ~/.jigaido/user_{id}/user.json
- Anyone can add bounties to groups; only creator can edit/delete
- Bounty IDs are sequential per group, not global
- Fix test mock compatibility issues in format_bounty function

apps/telegram-bot/tests/conftest.py

@@ -1,27 +1 @@
 """Pytest fixtures for telegram-bot tests."""
-
-import sys
-import tempfile
-from pathlib import Path
-
-import pytest
-
-# Add the app directory to path so `import db` works when running pytest
-sys.path.insert(0, str(Path(__file__).parent.parent))
-
-
-@pytest.fixture(autouse=True)
-def fresh_db(monkeypatch):
-    """Replace DB_PATH with a temp file before any test runs."""
-    import db as _db
-
-    tmp = tempfile.NamedTemporaryFile(suffix=".db", delete=False)
-    tmp_path = Path(tmp.name)
-    tmp.close()
-
-    monkeypatch.setattr(_db, "DB_PATH", tmp_path)
-    _db.init_db()
-
-    yield tmp_path
-
-    tmp_path.unlink(missing_ok=True)

apps/telegram-bot/tests/test_commands.py

@@ -101,12 +101,21 @@ class TestParseArgs:
 
 
 class TestFormatBounty:
-    def _row(self, id=1, text="Test bounty", link="https://example.com",
-             due_date_ts=None, informed_by_username="alice"):
+    def _row(
+        self,
+        id=1,
+        text="Test bounty",
+        link="https://example.com",
+        due_date_ts=None,
+        created_by_username="alice",
+    ):
         row = MagicMock()
         row.__getitem__ = lambda s, k: {
-            "id": id, "text": text, "link": link,
-            "due_date_ts": due_date_ts, "informed_by_username": informed_by_username
+            "id": id,
+            "text": text,
+            "link": link,
+            "due_date_ts": due_date_ts,
+            "created_by_username": created_by_username,
         }[k]
         return row
 
@@ -155,12 +164,12 @@ class TestFormatBounty:
         out = format_bounty(b)
         assert "OVERDUE" in out
 
-    def test_informed_by_shown(self):
-        b = self._row(informed_by_username="bob")
+    def test_created_by_shown(self):
+        b = self._row(created_by_username="bob")
         out = format_bounty(b)
         assert "@bob" in out
 
-    def test_informed_by_unknown_fallback(self):
-        b = self._row(informed_by_username=None)
+    def test_created_by_unknown_fallback(self):
+        b = self._row(created_by_username=None)
         out = format_bounty(b)
         assert "@unknown" in out