Read config.toml, keys.toml and themes, and open them with :config (stage 8b)

The config folder now sets everything: config.toml the settings (now
also `theme` and `editor`), keys.toml the keys, and themes/<name>.toml
the theme, laid over the built-in one, so a theme only needs what it
changes. Each file is applied again a second after it's saved; a
mistake only drops its own line, and the status bar says what's wrong,
naming the file.

:config lists the three files with their folder; Enter hands the
terminal to your editor (the editor setting, $VISUAL, $EDITOR, else
notepad or vi), writing the file first if it's missing, with every
option at its default behind a #, explained (keys.toml lists every
command by name). :theme switches themes until cumulus quits, like
:set.

The built-in theme gets the named styles the user picked, each also put
on by its tag: question (yellow, dashed), important (red, thick) and done
(gray, its title faded); and link styles blocks and supports, whose
label shows on a link without its own. Themes can also set [modes],
[node], [root], [branch] and [link].

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/view/canvas/render.rs

@@ -59,8 +59,11 @@ impl Scene {
                 }
             }
         }
-        let title_style =
-            if node.selected { Style::new().add_modifier(Modifier::BOLD) } else { Style::new() };
+        let title_style = match (node.selected, node.faded) {
+            (true, _) => Style::new().add_modifier(Modifier::BOLD),
+            (false, true) => Style::new().fg(self.muted),
+            (false, false) => Style::new(),
+        };
         for (row, line) in (rect.top() + 1..).zip(lines) {
             painter.text(ScreenPos::new(rect.left() + 2, row), line, title_style, &mine);
         }
@@ -93,7 +96,8 @@ impl Scene {
         if let Some(bullet) = chars.next() {
             painter.put(node.rect.pos, bullet, Style::new().fg(node.color));
             let rest = ScreenPos::new(node.rect.left() + 1, node.rect.top());
-            painter.text(rest, chars.as_str(), Style::new(), |_| true);
+            let style = if node.faded { Style::new().fg(self.muted) } else { Style::new() };
+            painter.text(rest, chars.as_str(), style, |_| true);
         }
     }
 

src/view/canvas/scene.rs

@@ -44,6 +44,8 @@ pub struct SceneNode {
     pub shape: Shape,
     /// Its color: the border, bullet or dot.
     pub color: Color,
+    /// Its title in the quiet color (the `done` style).
+    pub faded: bool,
     /// Whether the cursor is on it.
     pub selected: bool,
 }
@@ -118,7 +120,8 @@ impl Scene {
                 Some(edit) => scene.draft(node, edit, badge, style.border, camera, max_width),
                 None => shape(node, badge, style.border, camera, theme.glyphs, max_width),
             };
-            scene.nodes.push(SceneNode { id, rect, shape, color: style.color, selected: id == cursor });
+            let (color, faded, selected) = (style.color, style.faded, id == cursor);
+            scene.nodes.push(SceneNode { id, rect, shape, color, faded, selected });
         }
         // The cursor's node goes last, on top of any it overlaps.
         if let Some(index) = scene.nodes.iter().position(|node| node.selected) {
@@ -245,7 +248,7 @@ impl Scene {
                 continue;
             };
             let style = theme.link_style(&link.look, self.nodes[start].color);
-            let label = link.label.as_ref().map(|label| label.as_str());
+            let label = theme.link_label(link);
             self.connect(start, end, Bend::Halfway, style, LineOwner::Link(link.key()), label);
         }
     }

src/view/note.rs

@@ -174,7 +174,7 @@ impl NoteView {
             .map(|link| {
                 let out = link.start() == id;
                 let other = if out { link.end() } else { link.start() };
-                (out, other, link.label.as_ref().map(ToString::to_string).unwrap_or_default())
+                (out, other, theme.link_label(link).unwrap_or_default().to_string())
             })
             .collect();
         links.sort_by_key(|&(out, _, _)| !out);

src/view/outline.rs

@@ -164,7 +164,8 @@ impl OutlineView {
         let (doc, theme, glyphs) = (ctx.doc, ctx.theme, ctx.theme.glyphs);
         let Some(node) = doc.node(id) else { return };
         let top_level = lines.spans.is_empty();
-        let color = theme.node_style(node, id == doc.root()).color;
+        let style = theme.node_style(node, id == doc.root());
+        let color = style.color;
         let has_children = !doc.children(id).is_empty();
         let folded = visible.hidden.contains_key(&id);
         let marker = if node.is_portal() {
@@ -184,6 +185,8 @@ impl OutlineView {
         let muted = Style::new().fg(theme.muted);
         let title_style = if id == ctx.cursor {
             Style::new().fg(Color::Black).bg(theme.accent).add_modifier(Modifier::BOLD)
+        } else if style.faded {
+            muted
         } else {
             Style::new()
         };