Fix tree selector: proper selectedBg theme color, correct filter logic

- Add selectedBg theme color for active line highlight
- Fix filter modes:
  - no-tools: default minus tool results (still hides label/custom)
  - user-only: just user messages
  - labeled-only: just labeled entries
  - all: everything
- Update theme.md with new color tokens (50 total)

packages/coding-agent/docs/theme.md

@@ -21,12 +21,16 @@ Every theme must define all color tokens. There are no optional colors.
 | `dim` | Very dimmed text | Less important info, placeholders |
 | `text` | Default text color | Main content (usually `""`) |
 
-### Backgrounds & Content Text (7 colors)
+### Backgrounds & Content Text (11 colors)
 
 | Token | Purpose |
 |-------|---------|
+| `selectedBg` | Selected/active line background (e.g., tree selector) |
 | `userMessageBg` | User message background |
 | `userMessageText` | User message text color |
+| `customMessageBg` | Hook custom message background |
+| `customMessageText` | Hook custom message text color |
+| `customMessageLabel` | Hook custom message label/type text |
 | `toolPendingBg` | Tool execution box (pending state) |
 | `toolSuccessBg` | Tool execution box (success state) |
 | `toolErrorBg` | Tool execution box (error state) |
@@ -95,7 +99,7 @@ These create a visual hierarchy: off → minimal → low → medium → high →
 |-------|---------|
 | `bashMode` | Editor border color when in bash mode (! prefix) |
 
-**Total: 46 color tokens** (all required)
+**Total: 50 color tokens** (all required)
 
 ## Theme Format
 

packages/coding-agent/src/modes/interactive/components/tree-selector.ts

@@ -262,18 +262,30 @@ class TreeList implements Component {
 
 			// Apply filter mode
 			let passesFilter = true;
-			if (this.filterMode === "user-only") {
-				passesFilter =
-					(entry.type === "message" && entry.message.role === "user") ||
-					(entry.type === "custom_message" && entry.display);
-			} else if (this.filterMode === "no-tools") {
-				// Hide tool results
-				passesFilter = !(entry.type === "message" && entry.message.role === "toolResult");
-			} else if (this.filterMode === "labeled-only") {
-				passesFilter = flatNode.node.label !== undefined;
-			} else if (this.filterMode !== "all") {
-				// Default mode: hide label and custom entries
-				passesFilter = entry.type !== "label" && entry.type !== "custom";
+			switch (this.filterMode) {
+				case "user-only":
+					// Just user messages
+					passesFilter = entry.type === "message" && entry.message.role === "user";
+					break;
+				case "no-tools":
+					// Default minus tool results (still hide label/custom entries)
+					passesFilter =
+						entry.type !== "label" &&
+						entry.type !== "custom" &&
+						!(entry.type === "message" && entry.message.role === "toolResult");
+					break;
+				case "labeled-only":
+					// Just labeled entries
+					passesFilter = flatNode.node.label !== undefined;
+					break;
+				case "all":
+					// Show everything
+					passesFilter = true;
+					break;
+				default:
+					// Default mode: hide label and custom entries
+					passesFilter = entry.type !== "label" && entry.type !== "custom";
+					break;
 			}
 
 			if (!passesFilter) return false;
@@ -464,7 +476,7 @@ class TreeList implements Component {
 
 			let line = cursor + theme.fg("dim", prefix) + pathMarker + label + content;
 			if (isSelected) {
-				line = theme.inverse(line);
+				line = theme.bg("selectedBg", line);
 			}
 			lines.push(truncateToWidth(line, width));
 		}

packages/coding-agent/src/modes/interactive/theme/dark.json

@@ -11,6 +11,7 @@
 		"dimGray": "#666666",
 		"darkGray": "#505050",
 		"accent": "#8abeb7",
+		"selectedBg": "#3a3a4a",
 		"userMsgBg": "#343541",
 		"toolPendingBg": "#282832",
 		"toolSuccessBg": "#283228",
@@ -29,6 +30,7 @@
 		"dim": "dimGray",
 		"text": "",
 
+		"selectedBg": "selectedBg",
 		"userMessageBg": "userMsgBg",
 		"userMessageText": "",
 		"customMessageBg": "customMsgBg",

packages/coding-agent/src/modes/interactive/theme/light.json

@@ -10,6 +10,7 @@
 		"mediumGray": "#6c6c6c",
 		"dimGray": "#8a8a8a",
 		"lightGray": "#b0b0b0",
+		"selectedBg": "#d0d0e0",
 		"userMsgBg": "#e8e8e8",
 		"toolPendingBg": "#e8e8f0",
 		"toolSuccessBg": "#e8f0e8",
@@ -28,6 +29,7 @@
 		"dim": "dimGray",
 		"text": "",
 
+		"selectedBg": "selectedBg",
 		"userMessageBg": "userMsgBg",
 		"userMessageText": "",
 		"customMessageBg": "customMsgBg",

packages/coding-agent/src/modes/interactive/theme/theme.ts

@@ -34,7 +34,8 @@ const ThemeJsonSchema = Type.Object({
 		muted: ColorValueSchema,
 		dim: ColorValueSchema,
 		text: ColorValueSchema,
-		// Backgrounds & Content Text (10 colors)
+		// Backgrounds & Content Text (11 colors)
+		selectedBg: ColorValueSchema,
 		userMessageBg: ColorValueSchema,
 		userMessageText: ColorValueSchema,
 		customMessageBg: ColorValueSchema,
@@ -132,7 +133,13 @@ export type ThemeColor =
 	| "thinkingXhigh"
 	| "bashMode";
 
-export type ThemeBg = "userMessageBg" | "customMessageBg" | "toolPendingBg" | "toolSuccessBg" | "toolErrorBg";
+export type ThemeBg =
+	| "selectedBg"
+	| "userMessageBg"
+	| "customMessageBg"
+	| "toolPendingBg"
+	| "toolSuccessBg"
+	| "toolErrorBg";
 
 type ColorMode = "truecolor" | "256color";
 
@@ -488,6 +495,7 @@ function createTheme(themeJson: ThemeJson, mode?: ColorMode): Theme {
 	const fgColors: Record<ThemeColor, string | number> = {} as Record<ThemeColor, string | number>;
 	const bgColors: Record<ThemeBg, string | number> = {} as Record<ThemeBg, string | number>;
 	const bgColorKeys: Set<string> = new Set([
+		"selectedBg",
 		"userMessageBg",
 		"customMessageBg",
 		"toolPendingBg",