settings: pages edit a draft, and Save writes it

The qtmaildir, Assistant and Ask presets pages wrote a field on Enter,
and a switch or chip the moment it was clicked, so a half-finished
change reached the file and a slip could not be taken back. They now
edit a draft as fields are typed, and a Save and Discard pair in the
page header (SaveBar, through Page.actions) writes or drops it. Save
waits while a field holds a value that cannot be written, and a draft
over a file that changed on disk meanwhile is refused at Save rather
than written over it. A dot in the sidebar marks a page with unsaved
edits; drafts survive moving between pages. The four Mail pages share
one draft, since they are one file. Tool switches are staged too and
renamed on Save; model Load, Prefer and Restart stay immediate, being
actions rather than settings.

Live editing needed two rules. A field is no longer bound to its value,
which would reset the cursor and eat a typed trailing space; it follows
the value only when the draft moves under it. And a Repeater's model is
now the set of row keys (or a count), assigned only when that set
changes: an array rebuilt from the draft on each keystroke recreates
every row, including the one being typed in, which loses its focus.

Git, autostart's rows, HyprSunset, HyprIdle and User keep their own
buttons.

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

1 files changed, 8 insertions, 5 deletions

diff --git a/desktop/modules/assistant/README.md b/desktop/modules/assistant/README.md
index 004ec05..3c35dc6 100644
--- a/desktop/modules/assistant/README.md
+++ b/desktop/modules/assistant/README.md
@@ -5,11 +5,14 @@ canvas (`../../assistant/`).
 
 **Assistant** edits the daemon's `~/.config/desktop-assistant/config.toml`
 and switches its tools. The model fields (server, temperature, tool rounds,
-thinking) save on Enter, and an emptied field falls back to the daemon's
-default, shown as its placeholder; the defaults come from `assistant.py
---defaults`, so they are never copied here. The system prompt has its own
-box, Save and "Use the default". The tool environment (`[env]`) is one row
-per key, with an add row below. A tool's switch renames `tools/<name>.toml`
+thinking), the system prompt, the `[env]` rows and the tool switches all
+edit a draft, and the header's Save writes it: the config first, then the
+tool renames. An emptied field falls back to the daemon's default, shown as
+its placeholder; the defaults come from `assistant.py --defaults`, so they
+are never copied here. A refused number is outlined and holds Save back.
+The system prompt also has "Use the default". The tool environment
+(`[env]`) is one row per key, with an add row below. A tool's switch, once
+saved, renames `tools/<name>.toml`
 to `<name>.toml.off`, which the daemon's `*.toml` glob skips.
 
 The page also lists llama-server's models with their state. The daemon