feat: add --video CLI flag to control Veo video prompt after story generation

Add VideoEnabled bool (default true) to Flags, register --video bool flag in
command.go, export PromptForGalleryVideos/GenerateSelectedVideos, and wire them
into main.go via runStoryVideos — skipped when --video=false. Also update
findGalleryPages to walk subdirectories recursively so gallery PNGs inside
comics/<slug>/ are discovered from the CWD search root.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

4 files changed, 36 insertions, 13 deletions

diff --git a/internal/cli/command.go b/internal/cli/command.go
index 090b2d1..c9dd889 100644
--- a/internal/cli/command.go
+++ b/internal/cli/command.go
@@ -75,6 +75,8 @@ func setupFlags(cmd *cobra.Command, flags *Flags) {
 	cmd.Flags().StringVar(&flags.NarratorVoice, "narrator-voice", "",
 		"Gemini voice for cinematic story narration (default: random from cinematic pool). "+
 			"Valid values: Charon, Fenrir, Enceladus, Algieba, Aoede, Schedar")
+	cmd.Flags().BoolVar(&flags.VideoEnabled, "video", flags.VideoEnabled,
+		"Prompt to generate Veo videos after comic generation (default true; use --video=false to skip)")
 	cmd.Flags().BoolVar(&flags.SkipAudio, "skip-audio", false, "Skip audio generation")
 	cmd.Flags().BoolVar(&flags.SkipImages, "skip-images", false, "Skip image download")
 	cmd.Flags().BoolVar(&flags.GenerateAnki, "anki", false, "Generate Anki import file (APKG format by default, use --anki-csv for legacy CSV)")
diff --git a/internal/cli/flags.go b/internal/cli/flags.go
index df493a4..678b8ab 100644
--- a/internal/cli/flags.go
+++ b/internal/cli/flags.go
@@ -26,6 +26,7 @@ type Flags struct {
 	StoryNoUltraRealistic bool   // --no-ultra-realistic: disable photorealistic rendering requirement
 	StorySlug             string // --story-slug: force a specific output slug/directory (empty = auto from title)
 	NarratorVoice         string // --narrator-voice: Gemini voice for cinematic narration (empty = random)
+	VideoEnabled          bool   // --video: whether to prompt for Veo video generation after --story completes
 	SkipAudio             bool
 	SkipImages            bool
 	GenerateAnki          bool
@@ -72,6 +73,7 @@ func NewFlags() *Flags {
 		AudioFormat:         defaults.OutputFormat,
 		AudioProvider:       defaults.Provider,
 		ImageAPI:            "nanobanana",
+		VideoEnabled:        true,
 		DeckName:            "Bulgarian Vocabulary",
 		OpenAIModel:         "gpt-4o-mini-tts",
 		OpenAISpeed:         0.9,
diff --git a/internal/cli/prompts.go b/internal/cli/prompts.go
index ff17767..b43bb5d 100644
--- a/internal/cli/prompts.go
+++ b/internal/cli/prompts.go
@@ -3,6 +3,7 @@ package cli
 import (
 	"bufio"
 	"fmt"
+	"io/fs"
 	"os"
 	"path/filepath"
 	"sort"
@@ -10,14 +11,14 @@ import (
 	"strings"
 )
 
-// promptForGalleryVideos lists all *_gallery_*.png files found in outputDir,
-// shows them to the user, and asks whether they want to generate videos.
-// If the user agrees, it asks which pages to generate (e.g. "1,3,5" or "all")
-// and returns the parsed list of page numbers.
+// PromptForGalleryVideos lists all *_gallery_*.png files found under outputDir
+// (searching recursively), shows them to the user, and asks whether they want
+// to generate videos. If the user agrees, it asks which pages to generate
+// (e.g. "1,3,5" or "all") and returns the parsed list of page numbers.
 //
 // Returns an empty slice when the user declines or enters nothing.
 // Returns an error only on unexpected I/O or parse failures.
-func promptForGalleryVideos(outputDir string) ([]int, error) {
+func PromptForGalleryVideos(outputDir string) ([]int, error) {
 	pages, pngPaths, err := findGalleryPages(outputDir)
 	if err != nil {
 		return nil, err
@@ -41,13 +42,31 @@ func promptForGalleryVideos(outputDir string) ([]int, error) {
 	return askPageSelection(pages)
 }
 
-// findGalleryPages globs for *_gallery_*.png files in outputDir and returns
-// the sorted list of page numbers and matching file paths.
+// findGalleryPages walks outputDir recursively looking for *_gallery_*.png
+// files and returns the sorted list of unique page numbers and matching paths.
+// Walking recursively is necessary because the story runner places gallery
+// images in a per-comic subdirectory (comics/<slug>/) rather than directly
+// in the top-level output directory.
 func findGalleryPages(outputDir string) ([]int, []string, error) {
-	pattern := filepath.Join(outputDir, "*_gallery_*.png")
-	matches, err := filepath.Glob(pattern)
+	var matches []string
+
+	err := filepath.WalkDir(outputDir, func(path string, d fs.DirEntry, walkErr error) error {
+		if walkErr != nil {
+			// Skip unreadable directories rather than aborting the whole walk.
+			return nil
+		}
+		if d.IsDir() {
+			return nil
+		}
+		base := filepath.Base(path)
+		// Match files that follow the *_gallery_N.png naming convention.
+		if strings.Contains(base, "_gallery_") && strings.HasSuffix(base, ".png") {
+			matches = append(matches, path)
+		}
+		return nil
+	})
 	if err != nil {
-		return nil, nil, fmt.Errorf("cli: glob gallery files in %s: %w", outputDir, err)
+		return nil, nil, fmt.Errorf("cli: walking gallery files in %s: %w", outputDir, err)
 	}
 
 	sort.Strings(matches)
diff --git a/internal/cli/video_runner.go b/internal/cli/video_runner.go
index 40a1fdd..2679a26 100644
--- a/internal/cli/video_runner.go
+++ b/internal/cli/video_runner.go
@@ -7,19 +7,19 @@ import (
 	"codeberg.org/snonux/totalrecall/internal/video"
 )
 
-// generateSelectedVideos is the CLI runner that animates gallery PNG files
+// GenerateSelectedVideos is the CLI runner that animates gallery PNG files
 // into MP4 clips using Google's Veo model. It processes pages sequentially
 // (Veo generation is slow and API quotas make parallelism impractical).
 //
 // apiKey is the Google/Gemini API key passed by the caller.
-// selected is the list of gallery page numbers to process (from promptForGalleryVideos).
+// selected is the list of gallery page numbers to process (from PromptForGalleryVideos).
 // outputDir is both the directory that contains the gallery PNGs and the
 // destination for the resulting MP4 files (written next to the PNGs).
 //
 // Each page prints a "Generating…" line before the API call and a "Video saved:"
 // line with the output path on success. The function stops and returns on the
 // first error so callers can log it without silently skipping pages.
-func generateSelectedVideos(apiKey string, selected []int, outputDir string) error {
+func GenerateSelectedVideos(apiKey string, selected []int, outputDir string) error {
 	if len(selected) == 0 {
 		return nil
 	}