docs(adr): ADR 0021 built, D55 and D56 amended to what was built

A draft is changed in a sheet of its own, as the composer saves a card
as soon as it is left; a note's cards come from the whole note, its
selection left for later; the entry is "Flashcards from a text". The
developer agreed to all three on 26 Oct.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

docs/adr/0021-private-instance-and-assistant.md

@@ -1,11 +1,12 @@
 # ADR 0021: A private instance: approved sign-ups and an assistant the operator grants
 
-- **Status:** accepted 25 Oct 2026, to be built for v0.21.0 (D18). Decided by the
-  developer: D1–D6 on 23 Oct; on 25 Oct what an assistant may see and do (D7–D12), what it
-  keeps and does, where it lives, the proposal's points 4–8 and 10, how often it warns and
-  when it is built (D13–D18), who signs up and who operates (D19–D22), waiting accounts
-  (D23–D26), what people are told and what never goes (D27–D30), how the first step is
-  built (D31–D34), the second (D35–D46) and the third (D47–D56).
+- **Status:** accepted 25 Oct 2026, built on 25 and 26 Oct for v0.21.0 (D18). Decided by
+  the developer: D1–D6 on 23 Oct; on 25 Oct what an assistant may see and do (D7–D12), what
+  it keeps and does, where it lives, the proposal's points 4–8 and 10, how often it warns
+  and when it is built (D13–D18), who signs up and who operates (D19–D22), waiting
+  accounts (D23–D26), what people are told and what never goes (D27–D30), how the first
+  step is built (D31–D34), the second (D35–D46) and the third (D47–D56), whose D55 and D56
+  the developer amended on 26 Oct to what was built.
 - **Builds on:** ADR 0016 (the register), ADR 0019 (private studysets), ADR 0020
   (SimpleLogin), ADR 0022 (the hand-off and the connector gone).
 - **Changes:** the rule of 10 Oct 2026 that Halkyon calls no language model with an API
@@ -346,12 +347,18 @@ On 26 Oct, how the third step is built (the assistant answering in Learn):
   context in a session) and says what is wrong and why, changing nothing.
 - **D55 Cards made from text are drafts in a sheet** (recommended, over one draft at a
   time in the composer): listed as the text import lists cards, each chosen or not, a
-  tap opening one in the composer to change it; adding takes those chosen, marked as
-  made by an assistant (`origin: assistant`); nothing is added before (D10).
+  tap opening one in a small sheet of its own to change it (front and back, both
+  required); adding takes those chosen, marked as made by an assistant
+  (`origin: assistant`); nothing is added before (D10). Amended 26 Oct, as built: the
+  sheet replaced the composer, which saves a card as soon as it is left, so it would add
+  the draft before the person chose to.
 - **D56 Cards are made from a note, a PDF page or pasted text** (the three recommended,
-  over asking in the field as well): a note's menu (the whole note, or the text
-  selected), the PDF reader's card panel (the page shown, its text as PDFium reads it),
-  and Add material › With an assistant (a paragraph pasted or typed).
+  over asking in the field as well): a note's app bar (the whole note, its title and
+  text), the PDF reader's card panel (the page shown, its text as PDFium reads it), and
+  Add material › Flashcards from a text (a paragraph pasted or typed). Amended 26 Oct, as
+  built: a note's text selected is left for later, as the note editor's selection can't
+  be reached from its app bar as the PDF reader's is; and the entry is named for what it
+  makes, as the other Add material entries are, not "With an assistant".
 
 ## Proposal