feat: random ultra-realistic/comic style, --no-ultra-realistic flag, updated READMEv0.13.0

- Random 50/50 rendering mode per run (ultra-realistic or standard comic style)
- --no-ultra-realistic flag forces standard comic style when set
- renderingRequirement const centralised and applied to all image prompts via DRY renderReq() method
- Log rendering mode chosen at generation time
- Update README: correct page count (10), output filenames, all --story flags documented
- Bump version to 0.13.0

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

1 files changed, 15 insertions, 5 deletions

diff --git a/internal/story/runner.go b/internal/story/runner.go
index 107e584..3299d59 100644
--- a/internal/story/runner.go
+++ b/internal/story/runner.go
@@ -40,6 +40,10 @@ type RunnerConfig struct {
 	// adventure with aliens and spaceships"). Passed verbatim as the genre line in the
 	// Gemini story prompt so the model writes in that genre instead of a random one.
 	Theme string
+	// UltraRealistic controls whether the renderingRequirement photorealistic
+	// instruction is injected into every image prompt.
+	// nil → random 50/50 each run; true → always on; false → always off (--no-ultra-realistic).
+	UltraRealistic *bool
 	// NarratorVoice picks a specific Gemini cinematic voice for narration.
 	// Empty → random pick from the curated cinematic pool each run.
 	NarratorVoice string
@@ -61,6 +65,8 @@ func NewRunner(config *RunnerConfig) *Runner {
 	}
 
 	var apiKey, textModel, imageModel, imageTextModel, style, theme, narratorVoice string
+	// Resolve ultraRealistic: nil config or nil pointer → random 50/50 pick each run.
+	ultraRealistic := pickUltraRealistic()
 	if config != nil {
 		apiKey = config.APIKey
 		textModel = config.TextModel
@@ -69,6 +75,9 @@ func NewRunner(config *RunnerConfig) *Runner {
 		style = config.Style
 		theme = config.Theme
 		narratorVoice = config.NarratorVoice
+		if config.UltraRealistic != nil {
+			ultraRealistic = *config.UltraRealistic
+		}
 	}
 
 	// Narrator init failure (e.g. missing key) is non-fatal — handleNarration
@@ -89,11 +98,12 @@ func NewRunner(config *RunnerConfig) *Runner {
 			Theme:     theme,
 		}),
 		artist: NewArtist(&ArtistConfig{
-			APIKey:    apiKey,
-			Model:     imageModel,
-			TextModel: imageTextModel,
-			OutputDir: dir,
-			Style:     style,
+			APIKey:         apiKey,
+			Model:          imageModel,
+			TextModel:      imageTextModel,
+			OutputDir:      dir,
+			Style:          style,
+			UltraRealistic: ultraRealistic,
 		}),
 		narrator: narrator,
 	}