Add new AI models and update existing model implementations

New models:
- GPT Image 1.5 (OpenAI) - generation only, with masked API key input
- Nano Banana Pro (Google Gemini 3 Pro) - generation and editing
- Qwen Image - generation with img2img support

Updated models:
- Nano Banana: Updated to full release (Gemini 2.5 Flash Image),
  removed "Preview" designation, updated description
- Seedream: Upgraded to version 4.5 with stronger spatial understanding
- Renamed imagen4.py → imagen.py, seedream4.py → seedream.py,
  stable_diffusion_3_5_large_turbo.py → stable_diffusion_large_turbo.py

Features:
- Added is_secret parameter to ParameterDefinition for password fields
- OpenAI API key field now displays masked input (••••)

Translations:
- All 10 locale files updated with 171 translated messages each
- Added translations for all new model strings
- Updated Nano Banana strings across all languages

Documentation:
- README updated with all new model specifications and capabilities

Author: zquestz

README.md

@@ -1,14 +1,14 @@
 # Dream Prompter - GIMP Plugin
 
-Dream Prompter brings powerful AI models from Replicate directly into GIMP for intelligent image generation and editing. Choose from multiple advanced models including Flux 2 Pro, Imagen 4, Nano Banana, Qwen Image Edit Plus, Seedream 4, and Stable Diffusion 3.5 Large Turbo.
+Dream Prompter brings powerful AI models from Replicate directly into GIMP for intelligent image generation and editing. Choose from multiple advanced models including Flux 2 Pro, GPT Image 1.5, Imagen 4, Nano Banana, Nano Banana Pro, Qwen Image, Qwen Image Edit Plus, Seedream 4.5, and Stable Diffusion 3.5 Large Turbo.
 
 ![Dream Prompter](screenshots/dream-prompter.png)
 
 ## Features
 
 - 🎨 **AI Image Generation**: Create new images from text descriptions
 - ✨ **AI Image Editing**: Transform existing images with natural language prompts
-- 🤖 **Multiple AI Models**: Choose from Flux 2 Pro, Imagen 4, Nano Banana, Qwen Image Edit Plus, Seedream 4, and Stable Diffusion 3.5 Large Turbo
+- 🤖 **Multiple AI Models**: Choose from Flux 2 Pro, GPT Image 1.5, Imagen 4, Nano Banana, Nano Banana Pro, Qwen Image, Qwen Image Edit Plus, Seedream 4.5, and Stable Diffusion 3.5 Large Turbo
 - 🖼️ **Reference Images**: Support for multiple reference images (varies by model)
 - 🔄 **Smart Layer Management**: Automatically creates properly named layers
 - 🎯 **Dual Operation Modes**: Seamlessly switch between editing and generation
@@ -125,11 +125,14 @@ yay -S dream-prompter
 │   ├── __init__.py
 │   ├── factory.py
 │   ├── flux_pro.py
-│   ├── imagen4.py
+│   ├── gpt_image.py
+│   ├── imagen.py
 │   ├── nano_banana.py
+│   ├── nano_banana_pro.py
+│   ├── qwen_image.py
 │   ├── qwen_image_edit_plus.py
-│   ├── seedream4.py
-│   └── stable_diffusion_3_5_large_turbo.py
+│   ├── seedream.py
+│   └── stable_diffusion_large_turbo.py
 └── locale/ (optional)
     └── ...
 ```
@@ -243,6 +246,14 @@ If you get the **"replicate not installed"** error on Windows:
 - **Special Features**: Excellent text rendering, photorealism, character consistency, up to 4MP resolution
 - **More Info**: [Replicate Model Page](https://replicate.com/black-forest-labs/flux-2-pro)
 
+**GPT Image 1.5** (`openai/gpt-image-1.5`) - OpenAI's advanced image generation model:
+
+- **Capabilities**: Generation only
+- **Reference Images**: Up to 10 for generation
+- **File Size**: Maximum 10MB per image
+- **Formats**: PNG, JPEG, WebP
+- **Special Features**: Transparent backgrounds, quality control, input fidelity options
+
 **Imagen 4** (`google/imagen-4`) - Google's advanced image generation model:
 
 - **Capabilities**: Generation only
@@ -251,12 +262,29 @@ If you get the **"replicate not installed"** error on Windows:
 - **Formats**: PNG, JPEG
 - **Special Features**: Advanced safety filtering, high-quality generation
 
-**Nano Banana** (`google/nano-banana`) - Google's Gemini 2.5 Flash Image Preview:
+**Nano Banana** (`google/nano-banana`) - Google's Gemini 2.5 Flash Image model for fast, conversational workflows:
 
 - **Capabilities**: Both generation and editing
 - **Reference Images**: Up to 10 for generation, 9 for editing
 - **File Size**: Maximum 7MB per image
 - **Formats**: PNG, JPEG, WebP
+- **Special Features**: Character consistency, multi-image fusion, conversational editing, native image understanding
+
+**Nano Banana Pro** (`google/nano-banana-pro`) - Google's Gemini 3 Pro state of the art model:
+
+- **Capabilities**: Both generation and editing
+- **Reference Images**: Up to 14 for generation, 13 for editing
+- **File Size**: Maximum 10MB per image
+- **Formats**: PNG, JPEG, WebP
+- **Special Features**: 4K resolution, accurate text rendering, multi-image fusion, real-time Google Search integration
+
+**Qwen Image** (`qwen/qwen-image`) - Qwen's advanced image generation model:
+
+- **Capabilities**: Generation only
+- **Reference Images**: Up to 1 for img2img
+- **File Size**: Maximum 10MB per image
+- **Formats**: PNG, JPEG, WebP
+- **Special Features**: Guidance control, prompt enhancement, LoRA support
 
 **Qwen Image Edit Plus** (`qwen/qwen-image-edit-plus`) - Qwen's advanced image editing model:
 
@@ -266,13 +294,13 @@ If you get the **"replicate not installed"** error on Windows:
 - **Formats**: PNG, JPEG, WebP, GIF
 - **Special Features**: Specialized for image editing and transformation
 
-**Seedream 4** (`bytedance/seedream-4`) - ByteDance's unified generation and editing model:
+**Seedream 4.5** (`bytedance/seedream-4.5`) - ByteDance's upgraded image model with stronger spatial understanding:
 
 - **Capabilities**: Both generation and editing
-- **Reference Images**: Up to 10 for generation, 9 for editing
+- **Reference Images**: Up to 14 for generation, 13 for editing
 - **File Size**: Maximum 10MB per image
 - **Formats**: PNG, JPEG, WebP
-- **Special Features**: 4K resolution support, unified architecture
+- **Special Features**: 4K resolution support, enhanced prompt option, improved spatial understanding and world knowledge
 
 **Stable Diffusion 3.5 Large Turbo** (`stability-ai/stable-diffusion-3.5-large-turbo`) - Stability AI's high-resolution image generation model:
 
@@ -380,10 +408,14 @@ The plugin is organized into focused modules with a clean model-driven architect
 - **`models/__init__.py`** - Base model classes and registry system
 - **`models/factory.py`** - Model factory for centralized model management
 - **`models/flux_pro.py`** - Flux 2 Pro model implementation
-- **`models/imagen4.py`** - Imagen 4 model implementation
+- **`models/gpt_image.py`** - GPT Image 1.5 model implementation
+- **`models/imagen.py`** - Imagen 4 model implementation
 - **`models/nano_banana.py`** - Nano Banana model implementation
+- **`models/nano_banana_pro.py`** - Nano Banana Pro model implementation
+- **`models/qwen_image.py`** - Qwen Image model implementation
 - **`models/qwen_image_edit_plus.py`** - Qwen Image Edit Plus model implementation
-- **`models/seedream4.py`** - Seedream 4 model implementation
+- **`models/seedream.py`** - Seedream 4.5 model implementation
+- **`models/stable_diffusion_large_turbo.py`** - Stable Diffusion 3.5 Large Turbo model implementation
 
 The model system provides a clean abstraction for AI models, making it easy to:
 
@@ -504,4 +536,4 @@ This project is licensed under the MIT License - see the [LICENSE](LICENSE) file
 
 ## Credits
 
-Built with Replicate's API providing access to multiple advanced AI models including Black Forest Labs' Flux 2 Pro, Google's Imagen 4, Google's Nano Banana, Qwen's Image Edit Plus, ByteDance's Seedream 4, and Stability AI's Stable Diffusion 3.5 Large Turbo.
+Built with Replicate's API providing access to multiple advanced AI models including Black Forest Labs' Flux 2 Pro, OpenAI's GPT Image 1.5, Google's Imagen 4, Google's Nano Banana, Google's Nano Banana Pro, Qwen's Image, Qwen's Image Edit Plus, ByteDance's Seedream 4.5, and Stability AI's Stable Diffusion 3.5 Large Turbo.

dialog_gtk.py

@@ -631,6 +631,9 @@ def _create_parameter_widget(self, param_def, current_value):
                 else str(param_def.default_value)
             )
             widget.set_text(text_value)
+            if param_def.is_secret:
+                widget.set_visibility(False)
+                widget.set_input_purpose(Gtk.InputPurpose.PASSWORD)
             widget.connect(
                 "changed", self._on_parameter_changed, param_def.name
             )

dream-prompter.py

@@ -46,8 +46,9 @@ def do_create_procedure(self, name):
                 _(
                     "Transform existing images or generate new images using "
                     "advanced AI models from Replicate with natural language "
-                    "prompts. Choose from multiple models including Imagen 4, "
-                    "Nano Banana, Qwen Image Edit Plus, Seedream 4, and "
+                    "prompts. Choose from multiple models including "
+                    "GPT Image 1.5, Imagen 4, Nano Banana, Nano Banana Pro, "
+                    "Qwen Image, Qwen Image Edit Plus, Seedream 4.5, and "
                     "Stable Diffusion 3.5 Large Turbo."
                 ),
                 name,