fix: prevent browser target and focus surprises

- Respect the globally selected browser when renaming client aliases.
- Pass the resolved local profile into sync and async local transports so
  BROWSER_CLI_PROFILE is honored consistently.
- Stop tabs.active from explicitly focusing the OS browser window, avoiding
  virtual-desktop jumps during tab activation.
- Make window merging skip audible, unmuted windows so video playback windows
  are not selected as merge targets.
- Bump the Python package and extension manifest versions to 0.12.2.
- Add regression coverage for browser selection and focus-stealing behavior.

tests/test_extension_error_page_handling.py

@@ -111,6 +111,15 @@ def test_large_extension_operations_yield_between_batches():
     assert "perf.set_profile" in perf
     assert "__background" in connection
 
+def test_tab_activation_and_merge_do_not_steal_audible_video_window():
+    tabs = (ROOT / "extension" / "src" / "commands" / "tabs.ts").read_text()
+
+    assert "await chrome.windows.update(tab.windowId, { focused: true });" not in tabs
+    assert "windowHasAudibleTabs" in tabs
+    assert "!this.windowHasAudibleTabs(w)" in tabs
+    assert "skippedAudibleWindows" in tabs
+    assert "const target = movableWindows.find(w => w.focused) || movableWindows[0];" in tabs
+
 def test_session_autosave_is_debounced_and_non_overlapping():
     # The autosave lifecycle moved out of session.ts into a dedicated
     # AutoSaveManager (autosave.ts) during the structure refactor; the shared