feat(tui-go): inline action rows in the OUTPUT transcript

Surface side-effecting ("external feedback") events in the conversation
flow, opencode-style, instead of only in the EVENTS side log.

- New RouterEntry role "action" (glyph + text) appended at arrival so it
  interleaves with chat turns by order. Rendered dim with an accent gutter
  glyph; the EVENTS panel still carries the full stream.
- Surfaced: tool start (⏵), tool done (✓ / ✎ wrote <path> (+a −b) for a
  diff), tool failed (✗), rejected (✕ blocked), approval resolved
  (⌘ approved / ✕ rejected, noting "· via grant" on a grant auto-approve),
  and grant create/revoke (⊞ / ⊟ · scope). ApprovalResolved names no tool
  on the wire, so the tool is recovered from the pending queue before the
  gate is dropped.
- Toggle: "inline actions" palette command flips actionsHidden (rows are
  always recorded, gated at render, so toggling reveals history); persisted
  in tui-prefs.json. prefs.go refactored to load/mutate/save so the new
  field and statusbarHidden no longer clobber each other.
- demo.go: "actions" preview kind.

go build / vet / test green; rendered the flow via cmd/preview.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/tui-go/internal/app/prefs.go

@@ -9,7 +9,8 @@ import (
 // prefs is the TUI's local, persisted preferences (display-only client state — kept out
 // of the server config, which is shared/replayed). Stored as JSON in the correx config dir.
 type prefs struct {
-	StatusbarHidden []string `json:"statusbarHidden"`
+	StatusbarHidden     []string `json:"statusbarHidden"`
+	InlineActionsHidden bool     `json:"inlineActionsHidden"`
 }
 
 // statusSegment is one toggleable status-bar segment. The always-on segments (correx label,
@@ -37,44 +38,62 @@ func prefsPath() string {
 	return filepath.Join(dir, "tui-prefs.json")
 }
 
-// loadStatusbarHidden reads the persisted hidden-segment set (best-effort: a missing or
-// corrupt file yields an empty set, i.e. everything shown).
-func loadStatusbarHidden() map[string]bool {
-	out := map[string]bool{}
+// loadPrefs reads the whole prefs file (best-effort: a missing or corrupt file yields the
+// zero value, i.e. everything shown / actions visible).
+func loadPrefs() prefs {
+	var p prefs
 	path := prefsPath()
 	if path == "" {
-		return out
+		return p
 	}
-	data, err := os.ReadFile(path)
-	if err != nil {
-		return out
+	if data, err := os.ReadFile(path); err == nil {
+		_ = json.Unmarshal(data, &p)
 	}
-	var p prefs
-	if json.Unmarshal(data, &p) == nil {
-		for _, id := range p.StatusbarHidden {
-			out[id] = true
-		}
-	}
-	return out
+	return p
 }
 
-// saveStatusbarHidden writes the hidden set back to disk (best-effort; ignores IO errors so
-// a read-only home never crashes the UI). Order follows statusSegments for a stable file.
-func saveStatusbarHidden(hidden map[string]bool) {
+// savePrefs writes the whole prefs file (best-effort; ignores IO errors so a read-only home
+// never crashes the UI). Callers load, mutate one field, then save so nothing is clobbered.
+func savePrefs(p prefs) {
 	path := prefsPath()
 	if path == "" {
 		return
 	}
+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+		return
+	}
+	if data, err := json.MarshalIndent(p, "", "  "); err == nil {
+		_ = os.WriteFile(path, data, 0o644)
+	}
+}
+
+// loadStatusbarHidden reads the persisted hidden-segment set (best-effort: a missing or
+// corrupt file yields an empty set, i.e. everything shown).
+func loadStatusbarHidden() map[string]bool {
+	out := map[string]bool{}
+	for _, id := range loadPrefs().StatusbarHidden {
+		out[id] = true
+	}
+	return out
+}
+
+// saveStatusbarHidden writes the hidden set back to disk, preserving the other prefs fields.
+// Order follows statusSegments for a stable file.
+func saveStatusbarHidden(hidden map[string]bool) {
 	var ids []string
 	for _, seg := range statusSegments {
 		if hidden[seg.id] {
 			ids = append(ids, seg.id)
 		}
 	}
-	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
-		return
-	}
-	if data, err := json.MarshalIndent(prefs{StatusbarHidden: ids}, "", "  "); err == nil {
-		_ = os.WriteFile(path, data, 0o644)
-	}
+	p := loadPrefs()
+	p.StatusbarHidden = ids
+	savePrefs(p)
+}
+
+// saveInlineActionsHidden persists the inline-action-rows toggle, preserving other prefs fields.
+func saveInlineActionsHidden(hidden bool) {
+	p := loadPrefs()
+	p.InlineActionsHidden = hidden
+	savePrefs(p)
 }