feat(repository): integrate ignore filtering into selection pipeline + add unit tests

This commit introduces proper handling of the `ignore: true` flag in the
repository selection mechanism and adds comprehensive unit tests for both
`ignored.py` and `selected.py`.

- `get_selected_repos()` now filters ignored repositories in all implicit
  selection modes:
    • filter-only mode (string/category/tag)
    • `--all` mode
    • CWD-based selection

- Explicit identifiers (e.g. `pkgmgr install ignored-repo`) **bypass**
  ignore filtering, so the user can still operate directly on ignored
  repositories if they ask for them explicitly.

- Added `_maybe_filter_ignored()` helper to handle logic cleanly and allow
  future extension (e.g. integrating a CLI flag `--include-ignored`).

Under `tests/unit/pkgmgr/core/repository`:

1. **test_ignored.py**
   • Ensures `filter_ignored()` removes repos with `ignore: true`
   • Ensures empty lists are handled correctly

2. **test_selected.py**
   Comprehensive coverage of the selection logic:
   • Explicit identifiers bypass ignore filtering
   • Filter-only mode excludes ignored repos unless `include_ignored=True`
   • `--all` mode excludes ignored repos unless explicitly overridden
   • CWD-based detection filters ignored repos unless explicitly overridden

Before this change, ignored repositories still appeared in `pkgmgr list`,
`pkgmgr status`, and other commands using `get_selected_repos()`.
This was unintuitive and broke the expected semantics of the `ignore`
attribute.
The new logic ensures ignored repositories are truly invisible unless
explicitly requested.

https://chatgpt.com/share/69383b41-50a0-800f-a2b9-c680cd96d9e9

tests/unit/pkgmgr/core/repository/test_ignored.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import unittest
+
+from pkgmgr.core.repository.ignored import filter_ignored
+
+
+class TestFilterIgnored(unittest.TestCase):
+    def test_filter_ignored_removes_repos_with_ignore_true(self) -> None:
+        repos = [
+            {"provider": "github.com", "account": "user", "repository": "a", "ignore": True},
+            {"provider": "github.com", "account": "user", "repository": "b", "ignore": False},
+            {"provider": "github.com", "account": "user", "repository": "c"},
+        ]
+
+        result = filter_ignored(repos)
+
+        identifiers = {(r["provider"], r["account"], r["repository"]) for r in result}
+        self.assertNotIn(("github.com", "user", "a"), identifiers)
+        self.assertIn(("github.com", "user", "b"), identifiers)
+        self.assertIn(("github.com", "user", "c"), identifiers)
+
+    def test_filter_ignored_empty_list_returns_empty_list(self) -> None:
+        self.assertEqual(filter_ignored([]), [])
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/pkgmgr/core/repository/test_selected.py

@@ -0,0 +1,180 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import os
+import unittest
+from types import SimpleNamespace
+from unittest.mock import patch
+
+from pkgmgr.core.repository.selected import get_selected_repos
+
+
+def _repo(
+    provider: str,
+    account: str,
+    repository: str,
+    ignore: bool | None = None,
+    directory: str | None = None,
+):
+    repo = {
+        "provider": provider,
+        "account": account,
+        "repository": repository,
+    }
+    if ignore is not None:
+        repo["ignore"] = ignore
+    if directory is not None:
+        repo["directory"] = directory
+    return repo
+
+
+class TestGetSelectedRepos(unittest.TestCase):
+    def setUp(self) -> None:
+        self.repo_ignored = _repo(
+            "github.com",
+            "user",
+            "ignored-repo",
+            ignore=True,
+            directory="/repos/github.com/user/ignored-repo",
+        )
+        self.repo_visible = _repo(
+            "github.com",
+            "user",
+            "visible-repo",
+            ignore=False,
+            directory="/repos/github.com/user/visible-repo",
+        )
+        self.all_repos = [self.repo_ignored, self.repo_visible]
+
+    # ------------------------------------------------------------------
+    # 1) Explizite Identifier – ignorierte Repos dürfen ausgewählt werden
+    # ------------------------------------------------------------------
+    def test_identifiers_bypass_ignore_filter(self) -> None:
+        args = SimpleNamespace(
+            identifiers=["ignored-repo"],  # matches by repository name
+            all=False,
+            category=[],
+            string="",
+            tag=[],
+            include_ignored=False,  # should be ignored for explicit identifiers
+        )
+
+        selected = get_selected_repos(args, self.all_repos)
+
+        self.assertEqual(len(selected), 1)
+        self.assertIs(selected[0], self.repo_ignored)
+
+    # ------------------------------------------------------------------
+    # 2) Filter-only Modus – ignorierte Repos werden rausgefiltert
+    # ------------------------------------------------------------------
+    def test_filter_mode_excludes_ignored_by_default(self) -> None:
+        # string-Filter, der beide Repos matchen würde
+        args = SimpleNamespace(
+            identifiers=[],
+            all=False,
+            category=[],
+            string="repo",  # substring in beiden Namen
+            tag=[],
+            include_ignored=False,
+        )
+
+        selected = get_selected_repos(args, self.all_repos)
+
+        self.assertEqual(len(selected), 1)
+        self.assertIs(selected[0], self.repo_visible)
+
+    def test_filter_mode_can_include_ignored_when_flag_set(self) -> None:
+        args = SimpleNamespace(
+            identifiers=[],
+            all=False,
+            category=[],
+            string="repo",
+            tag=[],
+            include_ignored=True,
+        )
+
+        selected = get_selected_repos(args, self.all_repos)
+
+        # Beide Repos sollten erscheinen, weil include_ignored=True
+        self.assertEqual({r["repository"] for r in selected}, {"ignored-repo", "visible-repo"})
+
+    # ------------------------------------------------------------------
+    # 3) --all Modus – ignorierte Repos werden per Default entfernt
+    # ------------------------------------------------------------------
+    def test_all_mode_excludes_ignored_by_default(self) -> None:
+        args = SimpleNamespace(
+            identifiers=[],
+            all=True,
+            category=[],
+            string="",
+            tag=[],
+            include_ignored=False,
+        )
+
+        selected = get_selected_repos(args, self.all_repos)
+
+        self.assertEqual(len(selected), 1)
+        self.assertIs(selected[0], self.repo_visible)
+
+    def test_all_mode_can_include_ignored_when_flag_set(self) -> None:
+        args = SimpleNamespace(
+            identifiers=[],
+            all=True,
+            category=[],
+            string="",
+            tag=[],
+            include_ignored=True,
+        )
+
+        selected = get_selected_repos(args, self.all_repos)
+
+        self.assertEqual(len(selected), 2)
+        self.assertCountEqual(
+            [r["repository"] for r in selected],
+            ["ignored-repo", "visible-repo"],
+        )
+
+    # ------------------------------------------------------------------
+    # 4) CWD-Modus – Repo anhand des aktuellen Verzeichnisses auswählen
+    # ------------------------------------------------------------------
+    def test_cwd_selection_excludes_ignored_by_default(self) -> None:
+        # Wir lassen CWD auf das Verzeichnis des ignorierten Repos zeigen.
+        cwd = os.path.abspath(self.repo_ignored["directory"])
+
+        args = SimpleNamespace(
+            identifiers=[],
+            all=False,
+            category=[],
+            string="",
+            tag=[],
+            include_ignored=False,
+        )
+
+        with patch("os.getcwd", return_value=cwd):
+            selected = get_selected_repos(args, self.all_repos)
+
+        # Da das einzige Repo für dieses Verzeichnis ignoriert ist,
+        # sollte die Auswahl leer sein.
+        self.assertEqual(selected, [])
+
+    def test_cwd_selection_can_include_ignored_when_flag_set(self) -> None:
+        cwd = os.path.abspath(self.repo_ignored["directory"])
+
+        args = SimpleNamespace(
+            identifiers=[],
+            all=False,
+            category=[],
+            string="",
+            tag=[],
+            include_ignored=True,
+        )
+
+        with patch("os.getcwd", return_value=cwd):
+            selected = get_selected_repos(args, self.all_repos)
+
+        self.assertEqual(len(selected), 1)
+        self.assertIs(selected[0], self.repo_ignored)
+
+
+if __name__ == "__main__":
+    unittest.main()