Lay the notes screen out like a notes app

The list of notes and the note being written are one screen now, two
panes: the notes on the left, the open one on the right, side by side
where there is room and one at a time on a phone, where the back button
returns to the list.

The search box moved into the top of that list, and its results *are*
the list — searching is a way of finding a note, not a separate place to
be, and a tab for it was a tab too many. Emptying the box brings the
whole list back. Opening a hit opens that day at the lesson that
matched, rather than at the top of a day with six of them.

A row has to say what the note holds, so the listing carries it: the
subjects a day covers, how many lessons, and the first line actually
written in it. One request for the whole list rather than one per note.

`plainText` is now one rule in one place for wherever a note is shown
rather than edited — the search snippet and the list row both went
through their own half-copy of it, and the row's copy rendered a table
as `| | |` and left `_Fazit_` wearing its markers. It strips one leading
marker, not each in turn, because `## 1. Deutsch` keeps its lesson
number and the list rule was eating it.

Driven in Firefox at both widths: the list, the search, opening a hit,
the jump to the lesson, and the phone's list-then-note. 390 unit tests,
116/117 smoke.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/NOTES.md

@@ -68,7 +68,22 @@ On a phone it is worth adding to the home screen — it has a manifest and opens
 standalone, which is the difference between "a page I have to find" and "the
 thing I open in a free period".
 
-**Notizen** is one screen: the day, `‹ ›` to move between days, and the editor.
+**Notizen** is one screen in two panes: your notes on the left, the open one on
+the right. Side by side where there is room; on a phone the list comes first and
+a note pushes over it, with `‹ Notizen` to come back.
+
+The list is every note, newest first — the day, the lessons it covers, and the
+first thing written in it:
+
+```
+Freitag, 18.09.2026
+Deutsch · LF07
+Dreischritt: These, Argument mit Beleg, Fazit.
+```
+
+**＋** opens today, whether or not it has a note yet — the one thing a list of
+notes cannot show you, because an empty day is not a note. `‹ ›` and the date
+field move between days from there.
 
 - Opening a day with no note yet **fills in that day's lessons from WebUntis** —
   numbered, with times, teacher and room, cancellations left out and
@@ -130,17 +145,21 @@ so rather than being quietly reduced. `test/app-markdown.test.ts` is what holds
 that promise up: every construct in this document goes in and comes back out
 unchanged.
 
-### Suche — the notes themselves
+### Searching, in the list
 
-The **Suche** tab searches your own notes and nothing else. Every word has to
-appear, in any order, ignoring case and accents; there is no stemming, so
-*Argument* does not find *Argumente*.
+The box above the list searches your own notes and nothing else, and the results
+*are* the list — searching is a way of finding a note, not a separate place to
+be. Emptying the box brings the whole list back.
+
+Every word has to appear, in any order, ignoring case and accents; there is no
+stemming, so *Argument* does not find *Argumente*.
 
 A result names the **lesson**, not the day — `1. LF10 — 08:00–08:45` with the
-date beside it — because a day note holds five or six lessons and "Freitag" says
-nothing about which one matched. Tapping a day note opens it in the editor;
-anything else, such as a note from the Apple Notes import, opens read-only,
-since the editor is day-shaped and those notes have no day.
+date under it and the matched words marked — because a day note holds five or
+six lessons and "Freitag" says nothing about which one matched. Opening a hit
+opens that day **at that lesson**. A note that is not a school day, such as one
+from the Apple Notes import, opens read-only: the editor is day-shaped and those
+notes have no day.
 
 It reads the **files**, not the index. That is the point: notes reach the
 Postgres index only on a full crawl, so a lesson written this morning would not