fix: resolve merge conflicts and lint issues

- Merge origin/main changes (flattened buy/sell commands, --doc flag, aliases)
- Fix spinner placement for buy/sell commands
- Fix duplicate alias key 'p' in canonical subcommands
- Remove unused mypy ignore comments in spot_client.py
- Fix nested with statements in tests

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/test_config_runtime.py

@@ -8,7 +8,12 @@ import unittest
 from pathlib import Path
 from unittest.mock import patch
 
-from coinhunter.config import ensure_init_files, get_binance_credentials, load_config, load_env_file
+from coinhunter.config import (
+    ensure_init_files,
+    get_binance_credentials,
+    load_config,
+    load_env_file,
+)
 from coinhunter.runtime import get_runtime_paths
 
 
@@ -89,6 +94,8 @@ class ConfigRuntimeTestCase(unittest.TestCase):
             ),
         ):
             paths = get_runtime_paths()
-            with patch("coinhunter.config.ensure_runtime_dirs", side_effect=PermissionError("no write access")):
-                with self.assertRaisesRegex(RuntimeError, "Set COINHUNTER_HOME to a writable directory"):
-                    ensure_init_files(paths)
+            with (
+                patch("coinhunter.config.ensure_runtime_dirs", side_effect=PermissionError("no write access")),
+                self.assertRaisesRegex(RuntimeError, "Set COINHUNTER_HOME to a writable directory"),
+            ):
+                ensure_init_files(paths)