Edit priority and tags by direct manipulation

Extend v0.4 direct manipulation to the priority cookie and tags, each a
single 9P write. Priority and tags are not part of the slug, so these
edits never change the section id.

Priority:
- DocumentModel::setPriority writes /<doc>/<id>/priority; cyclePriority
  steps (none) -> A -> B -> C -> (none). The priority cookie gains a
  MouseArea: left-click / wheel-up advance, right-click / wheel-down back.

Tags:
- DocumentModel::setTags writes /<doc>/<id>/tags from a free-form string
  (space/comma/colon separated; the server normalizes and colon-joins).
- The tag row becomes editable: clicking a pill or the "+" affordance
  opens an inline TextField prefilled with the current tags; Enter or
  focus-loss commits, Escape cancels.

Server fix:
- set_section_priority passed None to rebuild_headline for an empty
  priority, but rebuild_headline treats None as "keep the existing
  value", so clearing a priority silently did nothing. Pass Some("")
  explicitly, matching set_section_keyword. Found while testing the clear
  path.

Verified: server tests (68 passed, +2 for priority cycle/clear and tag
set/clear keeping the id, plus the priority-clear fix). Live 9P run
cycled priority (none/A/B/C) and set/replaced tags on a headline with the
id stable throughout. GUI builds clean.

crates/ork-server/src/state.rs

@@ -1218,10 +1218,12 @@ impl OrkState {
         let section = self.find_section(&doc_state.doc, id)
             .ok_or_else(|| io::Error::new(io::ErrorKind::NotFound, "section not found"))?;
         
+        // Always pass Some(&priority): rebuild_headline treats None as "keep
+        // the existing priority", so an empty string (removal) must be passed
+        // explicitly as Some("") — mirroring set_section_keyword. Using None
+        // for empty here would silently leave the old priority in place.
         let priority = priority.trim().to_uppercase();
-        let pri = if priority.is_empty() { None } else { Some(priority.as_str()) };
-        
-        let new_headline = self.rebuild_headline(section, None, pri, None, None);
+        let new_headline = self.rebuild_headline(section, None, Some(&priority), None, None);
         let new_content = self.replace_headline(&doc_state.content, section, &new_headline)?;
         
         self.update_doc(doc_name, &doc_state.path, new_content)
@@ -2495,6 +2497,32 @@ mod tests {
         assert!(state.find_section(&state.get_doc("w").unwrap().doc, "first-task").is_some());
     }
 
+    #[test]
+    fn set_priority_cycles_and_clears_keeping_id() {
+        // Priority is not part of the slug, so setting/clearing it never
+        // changes the section id. Empty clears the priority.
+        let (_d, state) = state_with("#+TITLE: W\n* TODO Task one\n");
+        state.set_section_priority("w", "task-one", "A").unwrap();
+        assert_eq!(state.section_priority("w", "task-one").unwrap(), "A");
+        state.set_section_priority("w", "task-one", "C").unwrap();
+        assert_eq!(state.section_priority("w", "task-one").unwrap(), "C");
+        state.set_section_priority("w", "task-one", "").unwrap();
+        assert_eq!(state.section_priority("w", "task-one").unwrap_or_default(), "");
+        assert!(state.find_section(&state.get_doc("w").unwrap().doc, "task-one").is_some());
+    }
+
+    #[test]
+    fn set_tags_accepts_free_form_and_clears() {
+        // Tags may be space-separated on input and are stored colon-joined.
+        // An empty write removes all tags. The id is unaffected.
+        let (_d, state) = state_with("#+TITLE: W\n* TODO Task one\n");
+        state.set_section_tags("w", "task-one", "work urgent home").unwrap();
+        assert_eq!(state.section_tags("w", "task-one").unwrap(), "work:urgent:home");
+        state.set_section_tags("w", "task-one", "").unwrap();
+        assert_eq!(state.section_tags("w", "task-one").unwrap_or_default(), "");
+        assert!(state.find_section(&state.get_doc("w").unwrap().doc, "task-one").is_some());
+    }
+
     #[test]
     fn test_delete_section() {
         let (_d, state) = state_with("#+TITLE: W\n* One\n* Two\n* Three\n");

ui/qml/OutlineView.qml

@@ -129,6 +129,10 @@ ListView {
 
         property bool drawerOpen: false
 
+        // Inline tag editing: when true, the tag pills are replaced by a text
+        // field prefilled with the current tags.
+        property bool editingTags: false
+
         // Transient flash overlay when this row is revealed via a link.
         Rectangle {
             anchors.fill: parent
@@ -441,13 +445,29 @@ ListView {
                     }
                 }
 
-                // Priority cookie
+                // Priority cookie. Click cycles (none) -> A -> B -> C -> (none);
+                // right-click / wheel-down steps back. One 9P write per change.
                 Label {
+                    id: prioLabel
                     visible: (del.model.priority ?? "") !== ""
                     text: "[#" + (del.model.priority ?? "") + "]"
                     color: outline.priorityColor(del.model.priority ?? "")
                     font.pointSize: outline.baseFontSize
                     font.bold: true
+
+                    MouseArea {
+                        anchors.fill: parent
+                        hoverEnabled: true
+                        cursorShape: Qt.PointingHandCursor
+                        acceptedButtons: Qt.LeftButton | Qt.RightButton
+                        onClicked: (mouse) => {
+                            docModel.cyclePriority(del.index, mouse.button !== Qt.RightButton)
+                        }
+                        onWheel: (wheel) => {
+                            docModel.cyclePriority(del.index, wheel.angleDelta.y > 0)
+                            wheel.accepted = true
+                        }
+                    }
                 }
 
                 // Title. Rendered as StyledText so inline org links in the
@@ -486,23 +506,86 @@ ListView {
                     font.pointSize: outline.baseFontSize - 1
                 }
 
-                // Tags
-                Repeater {
-                    model: del.model.tags ?? []
-                    delegate: Rectangle {
-                        required property string modelData
-                        radius: 3
-                        color: theme.alternateBaseColor
-                        implicitWidth: tagLabel.implicitWidth + 8
-                        implicitHeight: tagLabel.implicitHeight + 3
-                        Label {
-                            id: tagLabel
-                            anchors.centerIn: parent
-                            text: parent.modelData
-                            color: theme.tagColor
-                            font.pointSize: outline.baseFontSize - 2
+                // Tags. In display mode, each tag is a pill and clicking any
+                // pill (or the "+" affordance) opens an inline editor. In edit
+                // mode, a text field holds the space/colon/comma-separated tags;
+                // Enter or focus-loss commits via one 9P write, Escape cancels.
+                RowLayout {
+                    spacing: 4
+                    visible: !del.editingTags
+
+                    Repeater {
+                        model: del.model.tags ?? []
+                        delegate: Rectangle {
+                            required property string modelData
+                            radius: 3
+                            color: tagMouse.containsMouse ? theme.highlightColor
+                                                          : theme.alternateBaseColor
+                            implicitWidth: tagLabel.implicitWidth + 8
+                            implicitHeight: tagLabel.implicitHeight + 3
+                            Label {
+                                id: tagLabel
+                                anchors.centerIn: parent
+                                text: parent.modelData
+                                color: theme.tagColor
+                                font.pointSize: outline.baseFontSize - 2
+                            }
+                            MouseArea {
+                                id: tagMouse
+                                anchors.fill: parent
+                                hoverEnabled: true
+                                cursorShape: Qt.PointingHandCursor
+                                onClicked: del.editingTags = true
+                            }
                         }
                     }
+
+                    // "+" affordance to add/edit tags (always available).
+                    Label {
+                        text: "＋"
+                        color: theme.placeholderTextColor
+                        font.pointSize: outline.baseFontSize - 1
+                        opacity: addTagMouse.containsMouse ? 1.0 : 0.5
+                        MouseArea {
+                            id: addTagMouse
+                            anchors.fill: parent
+                            hoverEnabled: true
+                            cursorShape: Qt.PointingHandCursor
+                            onClicked: del.editingTags = true
+                        }
+                    }
+                }
+
+                TextField {
+                    id: tagsEditor
+                    visible: del.editingTags
+                    Layout.preferredWidth: outline.baseFontSize * 14
+                    placeholderText: qsTr("tag1 tag2 …")
+                    font.pointSize: outline.baseFontSize - 1
+                    selectByMouse: true
+
+                    // Prefill with the current tags whenever edit mode opens.
+                    onVisibleChanged: {
+                        if (visible) {
+                            text = (del.model.tags ?? []).join(" ")
+                            forceActiveFocus()
+                            selectAll()
+                        }
+                    }
+
+                    function commit() {
+                        docModel.setTags(del.index, text.trim())
+                        del.editingTags = false
+                    }
+
+                    onAccepted: commit()
+                    // Commit when focus is lost (click elsewhere), unless the
+                    // editor was already closed (e.g. via Escape).
+                    onActiveFocusChanged: {
+                        if (!activeFocus && del.editingTags)
+                            commit()
+                    }
+                    Keys.onEscapePressed: del.editingTags = false
                 }
             }
 

ui/src/documentmodel.cpp

@@ -346,6 +346,72 @@ bool DocumentModel::cycleKeyword(int row, bool forward)
     return setKeyword(row, states[next]);
 }
 
+bool DocumentModel::setPriority(int row, const QString &priority)
+{
+    if (!m_client || row < 0 || row >= m_visibleRows.size())
+        return false;
+
+    const QString &id = m_visibleRows[row];
+    if (!m_sections.contains(id))
+        return false;
+
+    Section &sec = m_sections[id];
+    if (!m_client->write(sec.path + QStringLiteral("/priority"), priority))
+        return false;
+
+    sec.fieldsLoaded = false;
+    loadFields(sec);
+
+    const QModelIndex idx = index(row);
+    emit dataChanged(idx, idx, {PriorityRole});
+    return true;
+}
+
+bool DocumentModel::cyclePriority(int row, bool forward)
+{
+    if (!m_client || row < 0 || row >= m_visibleRows.size())
+        return false;
+
+    const QString &id = m_visibleRows[row];
+    if (!m_sections.contains(id))
+        return false;
+
+    Section &sec = m_sections[id];
+    if (!sec.fieldsLoaded)
+        loadFields(sec);
+
+    // Cycle: (none) -> A -> B -> C -> (none).
+    static const QStringList states = {QString(), QStringLiteral("A"),
+                                       QStringLiteral("B"), QStringLiteral("C")};
+    int cur = states.indexOf(sec.priority);
+    if (cur < 0)
+        cur = 0;  // treat unknown as the empty state
+    const int n = states.size();
+    const int next = forward ? (cur + 1) % n : (cur - 1 + n) % n;
+    return setPriority(row, states[next]);
+}
+
+bool DocumentModel::setTags(int row, const QString &tags)
+{
+    if (!m_client || row < 0 || row >= m_visibleRows.size())
+        return false;
+
+    const QString &id = m_visibleRows[row];
+    if (!m_sections.contains(id))
+        return false;
+
+    Section &sec = m_sections[id];
+    if (!m_client->write(sec.path + QStringLiteral("/tags"), tags))
+        return false;
+
+    sec.fieldsLoaded = false;
+    loadFields(sec);
+
+    const QModelIndex idx = index(row);
+    emit dataChanged(idx, idx, {TagsRole});
+    return true;
+}
+
 int DocumentModel::revealSection(const QString &sectionId, int bodyOffset)
 {
     if (sectionId.isEmpty() || !m_sections.contains(sectionId))

ui/src/documentmodel.h

@@ -93,6 +93,19 @@ public:
     // `forward` advances; otherwise steps back. Returns true on success.
     Q_INVOKABLE bool cycleKeyword(int row, bool forward);
 
+    // Set a section's priority directly (A/B/C, or empty to remove). Writes
+    // /<doc>/<id>/priority and refreshes the row. Returns true on success.
+    Q_INVOKABLE bool setPriority(int row, const QString &priority);
+
+    // Cycle a section's priority through (none) -> A -> B -> C -> (none).
+    // `forward` advances; otherwise steps back. Returns true on success.
+    Q_INVOKABLE bool cyclePriority(int row, bool forward);
+
+    // Set a section's tags from a free-form string. Tags may be separated by
+    // spaces, commas, or colons; the server normalizes them. An empty string
+    // removes all tags. Writes /<doc>/<id>/tags and refreshes the row.
+    Q_INVOKABLE bool setTags(int row, const QString &tags);
+
     // Reveal a section by id: expand all its ancestors so it becomes visible,
     // and return its visible row index (-1 if the id is unknown). Emits
     // sectionRevealed(row, bodyOffset) so the view can scroll to and highlight