Conversation and Author screens styled to match; glyph policy chosen from measurement

tui/theme.go

@@ -80,3 +80,43 @@ func choosePalette(force string) {
 		}
 	}
 }
+
+// Icons. Nerd Font glyphs, with an ASCII fallback so the interface still reads
+// when the font is not installed or the terminal cannot show it: -ascii, or a
+// TERM that says it cannot, chooses the fallback.
+type glyphSet struct {
+	Todo, Running, Blocked, Review, Done, Cancelled string
+	Folder, Branch, Commit, Cost, Person, Agent     string
+	Arrow, Dot, Rule                                string
+}
+
+var nerdGlyphs = glyphSet{
+	Todo: "\uf10c", Running: "\uf04b", Blocked: "\uf05e", Review: "\uf06e",
+	Done: "\uf00c", Cancelled: "\uf00d",
+	Folder: "\uf07b", Branch: "\uf126", Commit: "\uf1d3", Cost: "\uf155",
+	Person: "\uf007", Agent: "\uf085",
+	Arrow: "\uf105", Dot: "\uf111", Rule: "─",
+}
+
+var plainGlyphs = glyphSet{
+	Todo: "·", Running: "▶", Blocked: "■", Review: "◆",
+	Done: "✓", Cancelled: "✕",
+	Folder: "/", Branch: "branch", Commit: "commit", Cost: "cents",
+	Person: "you", Agent: "agent",
+	Arrow: "›", Dot: "·", Rule: "─",
+}
+
+// icons starts as plain Unicode on purpose. The Nerd Font is installed, but a
+// private-use glyph does not survive TUIOS's own screen capture, so whether it
+// draws cannot be checked from here. The words next to every icon carry the
+// meaning either way, and -nerd opts into the richer set once it has been seen
+// on the terminal that matters.
+var icons = plainGlyphs
+
+func chooseGlyphs(useNerd bool) {
+	if useNerd {
+		icons = nerdGlyphs
+		return
+	}
+	icons = plainGlyphs
+}