Hardware fixes: issue version, installer Cyrillic, console TUIs (0.9.2)

- /etc/issue shows the Das OS version instead of the kernel's; the server
  installer carries it into the installed system.
- das-server-installer: setfont -C /dev/tty0 before the language menu
  (sudo runs it in its own pty, so the Cyrillic was drawn as Latin), and
  floppy drives are no longer offered as install targets.
- ncdu on the desktop image and in das-server 0.4.0.
- das-shell 0.2.0: each prompt line sets its own color; the dbanner start
  screen buttons are no longer covered by the key bar; on the Linux
  console (TERM=linux) dprompt and dbanner draw solid borders and swap
  the glyphs that no console font has (▊▎▔▁ and others) for ones it has.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

srcpkgs/das-shell/files/python/das_shell/prompt_app.py

@@ -13,7 +13,7 @@ from textual.widgets import Button, Checkbox, Footer, Header, Input, Label, List
 from . import prompt
 from .cli_prompt import apply as apply_design, current
 from .i18n import t
-from .tui_common import NONE, AskDialog, color_options, color_value, run_as_root, to_select
+from .tui_common import NONE, AskDialog, color_options, color_value, console_mode, run_as_root, to_select
 
 # Settings of each segment type: (key, kind, Ukrainian label, English label)
 COLOR_KEYS = [("fg", "color", "Колір", "Color"), ("bold", "bool", "Жирний", "Bold")]
@@ -83,6 +83,7 @@ class PromptApp(App):
 
     def __init__(self, design=None):
         # The terminal's own 16 colors, as the prompt will use them
+        console_mode()
         super().__init__(ansi_color=True)
         self.design, self.source = (design, None) if design else current()
         self.design = prompt.normalize(self.design)