settings: the assistant's daemon config, tools, and Ask presets

Two settings pages for desktop-assistant.

Assistant edits the daemon's config.toml: server, temperature, tool
rounds, thinking, the system prompt, and the [env] values its tools
read; a switch per tool renames tools/<name>.toml to .toml.off, which
the daemon's glob skips. The daemon reads all of it at startup only, so
the page says when a change is pending and Restart runs assistant.sh
restart, showing its status when the daemon does not come back.

The file is edited line by line, like autostart.lua, so the comments
the example ships with survive: unset keys stay commented out in place.
Every write parses the whole new file with tomllib first and replaces
the old one atomically, so no edit can leave a config the daemon will
not start with. Defaults are read from assistant.py --defaults rather
than copied into QML.

Ask presets edits the canvas's canned questions, which Prefs already
stored for exactly this page: label, question, and the kinds each is
offered for. They apply live.

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

1 files changed, 215 insertions, 0 deletions

diff --git a/desktop/modules/assistant/PresetsPage.qml b/desktop/modules/assistant/PresetsPage.qml
new file mode 100644
index 0000000..ec103cf
--- /dev/null
+++ b/desktop/modules/assistant/PresetsPage.qml
@@ -0,0 +1,215 @@
+// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+import QtQuick
+import "../.."
+import "../../assistant/Presets.js" as Presets
+
+// One card per preset: its label and question, saved on Enter, and the file
+// kinds it is offered for. Every change saves the whole list to Prefs; Reset
+// drops the saved list, which brings the built-in one back.
+Column {
+    id: page
+    spacing: 10
+
+    readonly property var list: Presets.list(Prefs.presets)
+    // The kinds a preset can name: the four the canvas chats about, and
+    // "many", offered whenever two or more files are staged.
+    readonly property var kinds: ["pdf", "text", "code", "image", "many"]
+    property string error: ""
+    property int confirming: -1
+
+    // Saves a copy of the list with entry i replaced by fn(entry), or
+    // removed when fn returns null.
+    function edit(i, fn) {
+        const out = [];
+        page.list.forEach((p, j) => {
+            const c = { label: p.label, icon: p.icon, kinds: p.kinds.slice(), prompt: p.prompt };
+            if (j !== i) { out.push(c); return; }
+            const r = fn(c);
+            if (r) out.push(r);
+        });
+        page.error = "";
+        page.confirming = -1;
+        Prefs.setPresets(out);
+    }
+
+    function add() {
+        Prefs.setPresets(page.list.concat([{ label: "New preset", icon: Presets.FALLBACK,
+                                             kinds: ["text"], prompt: "Summarize this." }]));
+    }
+
+    component Small: Text {
+        color: Theme.subtext
+        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 4 }
+    }
+
+    component Field: Rectangle {
+        id: field
+        property string value: ""
+        property string placeholder: ""
+        signal commit(string text)
+        height: 32
+        radius: 8
+        color: Qt.alpha(Theme.base, 0.6)
+        TextInput {
+            anchors { fill: parent; leftMargin: 10; rightMargin: 10 }
+            verticalAlignment: TextInput.AlignVCenter
+            clip: true
+            selectByMouse: true
+            color: Theme.text
+            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 3 }
+            text: field.value
+            onAccepted: if (text !== field.value) field.commit(text)
+            Keys.onEscapePressed: event => {
+                if (text !== field.value) text = field.value;
+                else event.accepted = false;
+            }
+            Text {
+                anchors.verticalCenter: parent.verticalCenter
+                visible: parent.text === ""
+                text: field.placeholder
+                color: Theme.overlay
+                font: parent.font
+            }
+        }
+    }
+
+    Small {
+        width: page.width
+        wrapMode: Text.Wrap
+        text: "Offered on the assistant canvas for the staged files: a preset shows when every staged file is "
+            + "one of its kinds, or, with \"many\", when two or more are staged. Enter saves a field; "
+            + "changes apply at once."
+    }
+
+    Text {
+        width: page.width
+        visible: page.error !== ""
+        wrapMode: Text.Wrap
+        text: page.error
+        color: Theme.red
+        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 4 }
+    }
+
+    Repeater {
+        model: page.list
+
+        delegate: Rectangle {
+            id: card
+            required property var modelData
+            required property int index
+            objectName: "preset:" + index
+            width: page.width
+            height: body.implicitHeight + 20
+            radius: 10
+            color: Qt.alpha(Theme.surface, 0.45)
+
+            Column {
+                id: body
+                anchors { left: parent.left; right: parent.right; top: parent.top; margins: 10 }
+                spacing: 8
+
+                Item {
+                    width: parent.width
+                    height: 32
+                    Text {
+                        id: glyph
+                        anchors { left: parent.left; verticalCenter: parent.verticalCenter }
+                        width: 24
+                        text: card.modelData.icon ?? Presets.FALLBACK
+                        font { family: Theme.iconFamily; pixelSize: Theme.fontSize }
+                        color: Theme.text
+                    }
+                    Field {
+                        anchors { left: glyph.right; leftMargin: 6; right: del.left; rightMargin: 8; top: parent.top; bottom: parent.bottom }
+                        value: card.modelData.label
+                        placeholder: "label"
+                        onCommit: t => {
+                            if (t.trim() === "") { page.error = "A preset needs a label."; return; }
+                            page.edit(card.index, c => Object.assign(c, { label: t.trim() }));
+                        }
+                    }
+                    Button {
+                        id: del
+                        anchors { right: parent.right; verticalCenter: parent.verticalCenter }
+                        danger: true
+                        text: page.confirming === card.index ? "Confirm" : "Remove"
+                        onClicked: {
+                            if (page.confirming === card.index) page.edit(card.index, c => null);
+                            else page.confirming = card.index;
+                        }
+                    }
+                }
+
+                Field {
+                    width: parent.width
+                    value: card.modelData.prompt
+                    placeholder: "the question asked"
+                    onCommit: t => {
+                        if (t.trim() === "") { page.error = "A preset needs a question."; return; }
+                        page.edit(card.index, c => Object.assign(c, { prompt: t.trim() }));
+                    }
+                }
+
+                // A kind toggles on click; the last one cannot be cleared,
+                // since a preset with no kinds would never be offered.
+                Flow {
+                    width: parent.width
+                    spacing: 6
+                    Repeater {
+                        model: page.kinds
+                        Rectangle {
+                            id: chip
+                            required property string modelData
+                            readonly property bool on: card.modelData.kinds.includes(modelData)
+                            implicitWidth: chipText.implicitWidth + 20
+                            implicitHeight: 26
+                            radius: 13
+                            color: on ? Qt.alpha(Theme.accent, 0.85)
+                                 : chipArea.containsMouse ? Qt.alpha(Theme.accent, 0.22) : Qt.alpha(Theme.base, 0.6)
+                            Text {
+                                id: chipText
+                                anchors.centerIn: parent
+                                text: chip.modelData
+                                color: chip.on ? Theme.base : Theme.text
+                                font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 4 }
+                            }
+                            MouseArea {
+                                id: chipArea
+                                anchors.fill: parent
+                                hoverEnabled: true
+                                cursorShape: Qt.PointingHandCursor
+                                onClicked: {
+                                    const ks = card.modelData.kinds;
+                                    if (chip.on && ks.length === 1) { page.error = "A preset needs at least one kind."; return; }
+                                    page.edit(card.index, c => Object.assign(c, {
+                                        kinds: chip.on ? ks.filter(k => k !== chip.modelData) : ks.concat([chip.modelData]) }));
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    Row {
+        spacing: 8
+        Button { text: "Add preset"; onClicked: page.add() }
+        Button {
+            text: "Reset to defaults"
+            danger: true
+            enabled: Prefs.presets !== null
+            onClicked: Prefs.resetPresets()
+        }
+    }
+}