Type: Tabs indent markers and Justification follow the whole story

After Select All in threaded text, the Tabs panel's indent markers read
the indents of the edited frame alone. When another frame's paragraphs
had a different left indent, a marker drag changed them by the edited
frame's values, or left them alone. The markers now take every
paragraph of every frame in the story, so each paragraph keeps its own
left indent or first-line position.

The Justification dialog kept the frames of the story from the moment
it opened. OK now acts on the frames in the edited frame's thread when
it is pressed, so a frame that left the thread while the dialog was
open is not changed, and a frame that joined it is.

docs/target-app-parity.md

@@ -739,6 +739,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   - The function key shortcuts for Brushes, Color, Layers, Info, Gradient, Stroke, Attributes, Graphic Styles, Appearance, Align, Transform, Pathfinder, Transparency, and Symbols activate a background tab on the first press, hide its expanded dock or floating group when that tab is in front, and restore the group with all its tabs together on the next press; in an icon column they open and close the flyout while keeping the icons. A reassigned chord keeps that behavior, and Window > a hidden sibling restores the group.
   - Cmd/Ctrl+A follows the keyboard: in a panel, dialog or search field it selects the field's text, while the Type tool edits it selects all of that text (also `select.all` over MCP), and only otherwise every object. On macOS the menu bar's Select All, Cut, Copy and Paste (keys or clicks) act on a focused field too, and elsewhere the in-window menus' do: the field that had the keyboard when the menu opened gets them, with its selection, and the keyboard back (#516). In a frame of threaded text, Select All selects the whole story, highlighted in every frame: Copy and Cut take all of it, typing or Delete replaces it as one undo step, and a fill, a size step or a Character or Paragraph panel change applies to every frame's text (VectorCraft's own behavior; `textedit::select_all_in_a_threaded_frame_selects_the_whole_story`, `textedit::typing_over_the_whole_story_replaces_every_frames_text_in_one_step`).
   - With the whole story of threaded text selected by Select All, Remove Line Breaks, Remove Paragraph Breaks and Type › Bullets and Numbering › Convert to Text act on the text of every frame as one undo step, and the story stays selected after Convert to Text; a selection inside one frame changes only that frame (VectorCraft's own behavior; `textedit::remove_breaks_takes_the_whole_story_that_select_all_selected`, `textedit::convert_to_text_takes_the_whole_story_that_select_all_selected`).
+  - With the whole story of threaded text selected by Select All, the Character, Paragraph, OpenType, Tabs and Text Styles panels, the Justification dialog and the font menu change the frames that are in the edited frame's thread at the time of the change, locked and hidden frames included. A frame that has left the thread is not changed, and a frame added to the thread is (VectorCraft's own behavior; `panels::character::tests::story_changes_follow_the_edited_frames_thread_after_the_first_saved_frame_leaves`, `story_changes_leave_out_a_frame_that_left_and_take_in_a_frame_that_joined`, `story_changes_stay_in_the_edited_frame_once_its_thread_is_removed`, `story_changes_take_in_locked_and_hidden_frames`, `panels::tabs::tests::indent_markers_after_select_all_keep_each_story_paragraphs_indents`, `dialogs::justification::tests::justification_dialog_follows_the_story_thread_at_ok`).
   - With the whole story of threaded text selected by Select All, the Character, Paragraph, OpenType, Tabs and Text Styles panels, the Justification dialog and the font menu change the frames that are in the edited frame's thread at the time of the change, locked and hidden frames included. A frame that has left the thread is not changed, and a frame added to the thread is (VectorCraft's own behavior; `panels::character::tests::story_changes_follow_the_edited_frames_thread_after_the_first_saved_frame_leaves`, `story_changes_leave_out_a_frame_that_left_and_take_in_a_frame_that_joined`, `story_changes_stay_in_the_edited_frame_once_its_thread_is_removed`, `story_changes_take_in_locked_and_hidden_frames`).
   - Switching from a Type tool to the Eyedropper keeps a whole story selected by Select All: a pick applies to the text of every frame as one undo step, and switching back restores the story selection (VectorCraft's own behavior; `textedit::switching_to_the_eyedropper_keeps_the_whole_story_selected`).
   - While the Type tool edits text, a character typed with AltGr is typed and runs no command. Firefox on Windows reports AltGr as Ctrl and Alt held, so in the web build AltGr+L (ł on a Polish layout) does not also open Layer Options for a new layer, and AltGr+Q (@ on a German layout) does not also run Reset Tracking and Kerning. A Ctrl+Alt chord that types no character runs its command.