feat(config): add kitty pre‑shutdown session save and config updates

dot_config/kitty/kitty.conf

@@ -35,7 +35,7 @@ action_alias launch_os launch --cwd=current --type=os-window
 action_alias launch_ov launch --cwd=current --type=overlay
 action_alias launch_tb launch --cwd=current --type=tab
 action_alias launch_hs launch --cwd=current --location=hsplit --bias=25
-action_alias launch_vs launch --cwd=current --location=vsplit --bias=30
+action_alias launch_vs launch --cwd=current --location=vsplit --bias=33
 action_alias launch_vs50 launch --cwd=current --location=vsplit --bias=50
 
 # panes = kitty windows
@@ -84,12 +84,10 @@ map alt+o goto_tab 9
 # reopens today's session unless another running kitty already owns it: tabs,
 # splits, cwds, each shell's scrollback and the program running in it. Tabs
 # made with *_with_cwd / --cwd=current join it and are saved ~1s after each
-# change. ctrl+shift+d reopens any earlier day.
+# change, and right before shutdown/reboot (kitty-day-save.service). `tv
+# kitty-days` opens any earlier day in a new kitty.
 geninclude day_session.py
 watcher day_session.py
-map ctrl+shift+d kitten day_session.py
-# show only the active day's tabs (plus tabs outside any session)
-tab_bar_filter session:~ or session:^$
 
 # split nav (vim-aware)
 map ctrl+h kitten pass_keys.py neighboring_window left   ctrl+h
@@ -103,9 +101,11 @@ map super+up    resize_window taller
 map super+down  resize_window shorter 3
 
 tab_bar_style powerline
-tab_powerline_style slanted
-tab_bar_align center
+tab_powerline_style angled
+tab_bar_align left
 tab_bar_edge top
+# always shown, even with one tab: it carries the stack-layout pane indicator
+tab_bar_min_tabs 1
 
 # Titles come from ~/.config/kitty/tab_bar.py (`{custom}`): the repo the tab's
 # cwd belongs to, or the file nvim is editing when nvim is the active process.