feat(app): grouped project settings with docs links + scrollbar fix (#837)

* feat(app): group project settings into Worktree / Scripts / Metadata

Adds SettingsGroup component (title + info tooltip + trailing slot) and
restructures the project settings screen into three categorized groups
with explanatory tooltips. Metadata prompt labels drop the "prompt"
suffix now that they live under a "Metadata generation" group, and
placeholders read as example instructions a real user would write.
Applies useWebScrollbarStyle to the settings ScrollViews.

* Add ExternalLink component and docs links to project settings

packages/app/src/components/ui/external-link.tsx

@@ -0,0 +1,77 @@
+import { useCallback, type ReactNode } from "react";
+import { Pressable, Text } from "react-native";
+import { ArrowUpRight } from "lucide-react-native";
+import { StyleSheet, useUnistyles } from "react-native-unistyles";
+import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
+import { openExternalUrl } from "@/utils/open-external-url";
+
+interface ExternalLinkProps {
+  href: string;
+  label: string;
+  tooltip?: ReactNode;
+  testID?: string;
+  accessibilityLabel?: string;
+}
+
+/**
+ * Inline "Docs ↗" affordance — muted text + arrow-top-right icon, opens the
+ * URL via the platform's external opener. Wrap in a Tooltip when there's a
+ * one-line hint worth surfacing on hover/tap.
+ */
+export function ExternalLink({
+  href,
+  label,
+  tooltip,
+  testID,
+  accessibilityLabel,
+}: ExternalLinkProps) {
+  const { theme } = useUnistyles();
+  const handlePress = useCallback(() => {
+    void openExternalUrl(href);
+  }, [href]);
+
+  const trigger = (
+    <Pressable
+      onPress={handlePress}
+      hitSlop={8}
+      accessibilityRole="link"
+      accessibilityLabel={accessibilityLabel ?? label}
+      testID={testID}
+      style={styles.trigger}
+    >
+      <Text style={styles.label}>{label}</Text>
+      <ArrowUpRight size={12} color={theme.colors.foregroundMuted} />
+    </Pressable>
+  );
+
+  if (!tooltip) {
+    return trigger;
+  }
+
+  return (
+    <Tooltip delayDuration={0} enabledOnDesktop enabledOnMobile>
+      <TooltipTrigger asChild>{trigger}</TooltipTrigger>
+      <TooltipContent side="top" align="end" offset={6}>
+        <Text style={styles.tooltipText}>{tooltip}</Text>
+      </TooltipContent>
+    </Tooltip>
+  );
+}
+
+const styles = StyleSheet.create((theme) => ({
+  trigger: {
+    flexDirection: "row",
+    alignItems: "center",
+    gap: theme.spacing[1],
+  },
+  label: {
+    color: theme.colors.foregroundMuted,
+    fontSize: theme.fontSize.xs,
+  },
+  tooltipText: {
+    color: theme.colors.foreground,
+    fontSize: theme.fontSize.sm,
+    maxWidth: 280,
+    lineHeight: theme.fontSize.sm * 1.4,
+  },
+}));

packages/app/src/screens/project-settings-screen.tsx

@@ -19,9 +19,11 @@ import {
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
 import { Alert } from "@/components/ui/alert";
+import { ExternalLink } from "@/components/ui/external-link";
 import { LoadingSpinner } from "@/components/ui/loading-spinner";
 import { Switch } from "@/components/ui/switch";
 import { AdaptiveModalSheet } from "@/components/adaptive-modal-sheet";
+import { SettingsGroup } from "@/screens/settings/settings-group";
 import { SettingsSection } from "@/screens/settings/settings-section";
 import { settingsStyles } from "@/styles/settings";
 import { useProjects } from "@/hooks/use-projects";
@@ -53,31 +55,41 @@ interface MetadataPromptField {
 
 const METADATA_PROMPT_FIELDS: Record<MetadataPromptKey, MetadataPromptField> = {
   agentTitle: {
-    title: "Agent title prompt",
-    placeholder: "Keep titles short and action-oriented.",
+    title: "Agent titles",
+    placeholder: "Keep titles imperative and under 40 characters",
     sectionTestID: "metadata-prompt-agent-title-section",
     inputTestID: "metadata-prompt-agent-title-input",
   },
   branchName: {
-    title: "Branch name prompt",
-    placeholder: "Prefix branches with feat/ or fix/.",
+    title: "Branch names",
+    placeholder: "Prefix branches with feat/ or fix/, mb/ for personal branches",
     sectionTestID: "metadata-prompt-branch-name-section",
     inputTestID: "metadata-prompt-branch-name-input",
   },
   commitMessage: {
-    title: "Commit message prompt",
-    placeholder: "Use Conventional Commits.",
+    title: "Commit messages",
+    placeholder: "Use Conventional Commits with a scope",
     sectionTestID: "metadata-prompt-commit-message-section",
     inputTestID: "metadata-prompt-commit-message-input",
   },
   pullRequest: {
-    title: "Pull request prompt",
-    placeholder: "Include risk notes and a test plan.",
+    title: "Pull requests",
+    placeholder: "Lead with a one-paragraph summary, include a Test plan section",
     sectionTestID: "metadata-prompt-pull-request-section",
     inputTestID: "metadata-prompt-pull-request-input",
   },
 };
 
+const WORKTREE_GROUP_INFO =
+  "Commands that run when a worktree is created or torn down for this project";
+const WORKTREE_DOCS_URL = "https://paseo.sh/docs/worktrees";
+const WORKTREE_DOCS_TOOLTIP =
+  "See docs for more details and the environment variables available to these commands";
+const SCRIPTS_GROUP_INFO =
+  "Long-running services and one-off commands you can launch from any agent in this project";
+const METADATA_GROUP_INFO =
+  "Project-specific instructions injected into the AI prompts Paseo uses to generate metadata — use them to enforce your team's conventions like branch naming, commit style, or PR format";
+
 const NO_TARGET_MESSAGE = "We don't have an editable copy of this project on any connected host.";
 
 const HOST_SWITCHER_LABEL = "Switch host";
@@ -574,43 +586,82 @@ function ProjectConfigForm({
     [handleAddScript],
   );
 
+  const setupDocsLink = useMemo(
+    () => (
+      <ExternalLink
+        href={WORKTREE_DOCS_URL}
+        label="Docs"
+        tooltip={WORKTREE_DOCS_TOOLTIP}
+        testID="worktree-setup-docs-link"
+      />
+    ),
+    [],
+  );
+  const teardownDocsLink = useMemo(
+    () => (
+      <ExternalLink
+        href={WORKTREE_DOCS_URL}
+        label="Docs"
+        tooltip={WORKTREE_DOCS_TOOLTIP}
+        testID="worktree-teardown-docs-link"
+      />
+    ),
+    [],
+  );
+
   const isStale = writeError?.code === "stale_project_config";
   const isWriteFailed = writeError?.code === "write_failed";
   const saveDisabled = saveMutation.isPending || isStale || hasInvalidScripts;
 
   return (
     <View>
-      <SettingsSection title="Worktree setup" testID="worktree-setup-section">
-        <View style={settingsStyles.card}>
-          <TextInput
-            testID="worktree-setup-input"
-            accessibilityLabel="Worktree setup commands"
-            multiline
-            value={draft.setupText}
-            onChangeText={handleSetupChange}
-            placeholder="npm install"
-            placeholderTextColor={styles.placeholderColor.color}
-            style={styles.lifecycleInput}
-          />
-        </View>
-      </SettingsSection>
+      <SettingsGroup
+        title="Worktree lifecycle hooks"
+        info={WORKTREE_GROUP_INFO}
+        testID="worktree-group"
+      >
+        <SettingsSection title="Setup" testID="worktree-setup-section" trailing={setupDocsLink}>
+          <View style={settingsStyles.card}>
+            <TextInput
+              testID="worktree-setup-input"
+              accessibilityLabel="Worktree setup commands"
+              multiline
+              value={draft.setupText}
+              onChangeText={handleSetupChange}
+              placeholder="npm install"
+              placeholderTextColor={styles.placeholderColor.color}
+              style={styles.lifecycleInput}
+            />
+          </View>
+        </SettingsSection>
 
-      <SettingsSection title="Worktree teardown" testID="worktree-teardown-section">
-        <View style={settingsStyles.card}>
-          <TextInput
-            testID="worktree-teardown-input"
-            accessibilityLabel="Worktree teardown commands"
-            multiline
-            value={draft.teardownText}
-            onChangeText={handleTeardownChange}
-            placeholder="docker compose down"
-            placeholderTextColor={styles.placeholderColor.color}
-            style={styles.lifecycleInput}
-          />
-        </View>
-      </SettingsSection>
+        <SettingsSection
+          title="Teardown"
+          testID="worktree-teardown-section"
+          trailing={teardownDocsLink}
+          flush
+        >
+          <View style={settingsStyles.card}>
+            <TextInput
+              testID="worktree-teardown-input"
+              accessibilityLabel="Worktree teardown commands"
+              multiline
+              value={draft.teardownText}
+              onChangeText={handleTeardownChange}
+              placeholder="docker compose down"
+              placeholderTextColor={styles.placeholderColor.color}
+              style={styles.lifecycleInput}
+            />
+          </View>
+        </SettingsSection>
+      </SettingsGroup>
 
-      <SettingsSection title="Scripts" testID="scripts-section" trailing={scriptsTrailing}>
+      <SettingsGroup
+        title="Scripts"
+        info={SCRIPTS_GROUP_INFO}
+        trailing={scriptsTrailing}
+        testID="scripts-group"
+      >
         <View style={settingsStyles.card} testID="scripts-list">
           {draft.scripts.length === 0 ? (
             <View style={settingsStyles.row}>
@@ -628,16 +679,19 @@ function ProjectConfigForm({
             ))
           )}
         </View>
-      </SettingsSection>
+      </SettingsGroup>
 
-      {METADATA_PROMPT_KEYS.map((key) => (
-        <MetadataPromptSection
-          key={key}
-          promptKey={key}
-          value={draft.metadataPrompts[key]}
-          onChange={handleMetadataPromptChange}
-        />
-      ))}
+      <SettingsGroup title="Metadata generation" info={METADATA_GROUP_INFO} testID="metadata-group">
+        {METADATA_PROMPT_KEYS.map((key, index) => (
+          <MetadataPromptSection
+            key={key}
+            promptKey={key}
+            value={draft.metadataPrompts[key]}
+            onChange={handleMetadataPromptChange}
+            flush={index === METADATA_PROMPT_KEYS.length - 1}
+          />
+        ))}
+      </SettingsGroup>
 
       {isStale ? (
         <View style={styles.calloutWrap}>
@@ -825,16 +879,17 @@ interface MetadataPromptSectionProps {
   promptKey: MetadataPromptKey;
   value: string;
   onChange: (key: MetadataPromptKey, text: string) => void;
+  flush?: boolean;
 }
 
-function MetadataPromptSection({ promptKey, value, onChange }: MetadataPromptSectionProps) {
+function MetadataPromptSection({ promptKey, value, onChange, flush }: MetadataPromptSectionProps) {
   const meta = METADATA_PROMPT_FIELDS[promptKey];
   const handleChange = useCallback(
     (text: string) => onChange(promptKey, text),
     [onChange, promptKey],
   );
   return (
-    <SettingsSection title={meta.title} testID={meta.sectionTestID}>
+    <SettingsSection title={meta.title} testID={meta.sectionTestID} flush={flush}>
       <View style={settingsStyles.card}>
         <TextInput
           testID={meta.inputTestID}

packages/app/src/screens/settings-screen.tsx

@@ -76,6 +76,7 @@ import ProjectsScreen from "@/screens/projects-screen";
 import ProjectSettingsScreen from "@/screens/project-settings-screen";
 import { useIsCompactFormFactor } from "@/constants/layout";
 import { useLocalDaemonServerId } from "@/hooks/use-is-local-daemon";
+import { useWebScrollbarStyle } from "@/hooks/use-web-scrollbar-style";
 import {
   buildHostOpenProjectRoute,
   buildProjectsSettingsRoute,
@@ -812,6 +813,11 @@ export default function SettingsScreen({ view }: SettingsScreenProps) {
   const isCompactLayout = useIsCompactFormFactor();
   const insets = useSafeAreaInsets();
   const insetBottomStyle = useMemo(() => ({ paddingBottom: insets.bottom }), [insets.bottom]);
+  const webScrollbarStyle = useWebScrollbarStyle();
+  const scrollViewStyle = useMemo(
+    () => [styles.scrollView, webScrollbarStyle],
+    [webScrollbarStyle],
+  );
   const hosts = useHosts();
   const hostServerIds = useMemo(() => hosts.map((host) => host.serverId), [hosts]);
   const anyOnlineServerId = useAnyOnlineHostServerId(hostServerIds);
@@ -1079,7 +1085,7 @@ export default function SettingsScreen({ view }: SettingsScreenProps) {
     return (
       <View style={styles.container}>
         <BackHeader title="Settings" onBack={handleBackToWorkspace} />
-        <ScrollView style={styles.scrollView} contentContainerStyle={insetBottomStyle}>
+        <ScrollView style={scrollViewStyle} contentContainerStyle={insetBottomStyle}>
           <SettingsSidebar
             view={view}
             onSelectSection={handleSelectSection}
@@ -1108,7 +1114,7 @@ export default function SettingsScreen({ view }: SettingsScreenProps) {
           titleAccessory={detailHeader?.titleAccessory}
           onBack={detailBackHandler}
         />
-        <ScrollView style={styles.scrollView} contentContainerStyle={insetBottomStyle}>
+        <ScrollView style={scrollViewStyle} contentContainerStyle={insetBottomStyle}>
           <View style={styles.content}>{content}</View>
         </ScrollView>
         {addHostModals}
@@ -1153,7 +1159,7 @@ export default function SettingsScreen({ view }: SettingsScreenProps) {
             }
             leftStyle={desktopStyles.detailLeft}
           />
-          <ScrollView style={styles.scrollView} contentContainerStyle={insetBottomStyle}>
+          <ScrollView style={scrollViewStyle} contentContainerStyle={insetBottomStyle}>
             <View style={styles.content}>{content}</View>
           </ScrollView>
         </View>

packages/app/src/screens/settings/settings-group.tsx

@@ -0,0 +1,94 @@
+import { useMemo, type ReactNode } from "react";
+import { Pressable, Text, View, type StyleProp, type ViewStyle } from "react-native";
+import { Info } from "lucide-react-native";
+import { StyleSheet, useUnistyles } from "react-native-unistyles";
+import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
+
+interface SettingsGroupProps {
+  title: string;
+  info?: ReactNode;
+  trailing?: ReactNode;
+  testID?: string;
+  style?: StyleProp<ViewStyle>;
+  children: ReactNode;
+}
+
+/**
+ * Top-level grouping above one or more SettingsSection blocks. Use when a
+ * settings screen has more than one logical area — the group title carries the
+ * category, the optional info tooltip explains it, and the inner sections keep
+ * their muted iOS-style labels.
+ */
+export function SettingsGroup({
+  title,
+  info,
+  trailing,
+  testID,
+  style,
+  children,
+}: SettingsGroupProps) {
+  const { theme } = useUnistyles();
+  const groupStyle = useMemo(() => [styles.group, style], [style]);
+  return (
+    <View style={groupStyle} testID={testID}>
+      <View style={styles.header}>
+        <View style={styles.titleRow}>
+          <Text style={styles.title}>{title}</Text>
+          {info ? (
+            <Tooltip delayDuration={0} enabledOnDesktop enabledOnMobile>
+              <TooltipTrigger asChild>
+                <Pressable
+                  accessibilityRole="button"
+                  accessibilityLabel={`About ${title}`}
+                  testID={testID ? `${testID}-info` : undefined}
+                  hitSlop={8}
+                  style={styles.infoButton}
+                >
+                  <Info size={theme.iconSize.sm} color={theme.colors.foregroundMuted} />
+                </Pressable>
+              </TooltipTrigger>
+              <TooltipContent side="top" align="start" offset={8}>
+                <Text style={styles.tooltipText}>{info}</Text>
+              </TooltipContent>
+            </Tooltip>
+          ) : null}
+        </View>
+        {trailing}
+      </View>
+      {children}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create((theme) => ({
+  group: {
+    marginBottom: theme.spacing[8],
+  },
+  header: {
+    flexDirection: "row",
+    alignItems: "center",
+    justifyContent: "space-between",
+    gap: theme.spacing[2],
+    marginBottom: theme.spacing[4],
+  },
+  titleRow: {
+    flexDirection: "row",
+    alignItems: "center",
+    gap: theme.spacing[2],
+  },
+  title: {
+    color: theme.colors.foreground,
+    fontSize: theme.fontSize.base,
+    fontWeight: theme.fontWeight.normal,
+  },
+  infoButton: {
+    padding: theme.spacing[1],
+    marginLeft: -theme.spacing[1],
+  },
+  tooltipText: {
+    color: theme.colors.foreground,
+    fontSize: theme.fontSize.sm,
+    maxWidth: 280,
+    lineHeight: theme.fontSize.sm * 1.4,
+  },
+}));

packages/app/src/screens/settings/settings-section.tsx

@@ -8,6 +8,11 @@ interface SettingsSectionProps {
   trailing?: ReactNode;
   testID?: string;
   style?: StyleProp<ViewStyle>;
+  /**
+   * Drops the section's bottom margin. Use when the section is the last child
+   * of a SettingsGroup, so the group's own bottom margin owns the trailing gap.
+   */
+  flush?: boolean;
   children: ReactNode;
 }
 
@@ -21,9 +26,13 @@ export function SettingsSection({
   trailing,
   testID,
   style,
+  flush,
   children,
 }: SettingsSectionProps) {
-  const sectionStyle = useMemo(() => [settingsStyles.section, style], [style]);
+  const sectionStyle = useMemo(
+    () => [settingsStyles.section, flush ? styles.flush : null, style],
+    [flush, style],
+  );
   return (
     <View style={sectionStyle} testID={testID}>
       <View style={styles.header}>
@@ -47,4 +56,7 @@ const styles = StyleSheet.create((theme) => ({
   content: {
     gap: theme.spacing[3],
   },
+  flush: {
+    marginBottom: 0,
+  },
 }));