fix(import[dry-run]) Gate "Would write to" on having actual changes

why: The dry-run path unconditionally printed "Would write to ..."
even when all repos were SKIP_UNCHANGED, misleading users into
thinking a write would occur.
what:
- Gate the "Would write to" message on added/updated/pruned counts > 0
- Show "No changes to write" when no modifications would be made
- Add test verifying no-changes dry run produces correct message

Author: tony

src/vcspull/cli/import_cmd/_common.py

@@ -1056,11 +1056,17 @@ def _run_import(
                 "[DRY-RUN] Skipped %s pinned repositories",
                 colors.info(str(skip_pinned_count)),
             )
-        log.info(
-            "\n%s Dry run complete. Would write to %s",
-            colors.warning("→"),
-            colors.muted(display_config_path),
-        )
+        if added_count > 0 or updated_url_count > 0 or pruned_count > 0:
+            log.info(
+                "\n%s Dry run complete. Would write to %s",
+                colors.warning("→"),
+                colors.muted(display_config_path),
+            )
+        else:
+            log.info(
+                "%s Dry run complete. No changes to write.",
+                colors.success("✓"),
+            )
         return 0
 
     if (

tests/cli/test_import_repos.py

@@ -4086,6 +4086,58 @@ def test_import_dry_run_shows_summary_counts(
     assert "Dry run complete" in caplog.text
 
 
+def test_import_dry_run_no_changes_no_write_message(
+    tmp_path: pathlib.Path,
+    monkeypatch: MonkeyPatch,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Dry run with zero changes says 'No changes' instead of 'Would write'."""
+    caplog.set_level(logging.INFO)
+    monkeypatch.setenv("HOME", str(tmp_path))
+    workspace = tmp_path / "repos"
+    workspace.mkdir()
+    config_file = tmp_path / ".vcspull.yaml"
+
+    # All repos already match → SKIP_UNCHANGED, no adds/updates/prunes
+    save_config_yaml(
+        config_file,
+        {
+            "~/repos/": {
+                "repo1": {
+                    "repo": _SSH,
+                    "metadata": {"imported_from": "github:testuser"},
+                },
+            },
+        },
+    )
+
+    importer = MockImporter(repos=[_make_repo("repo1")])
+    _run_import(
+        importer,
+        service_name="github",
+        target="testuser",
+        workspace=str(workspace),
+        mode="user",
+        language=None,
+        topics=None,
+        min_stars=0,
+        include_archived=False,
+        include_forks=False,
+        limit=100,
+        config_path_str=str(config_file),
+        dry_run=True,
+        yes=True,
+        output_json=False,
+        output_ndjson=False,
+        color="never",
+        sync=True,
+        import_source="github:testuser",
+    )
+
+    assert "No changes to write" in caplog.text
+    assert "Would write to" not in caplog.text
+
+
 # ---------------------------------------------------------------------------
 # Collision / cross-source prune tests
 # ---------------------------------------------------------------------------