Switch to VectorEngine gpt-image-2 and edits

Replace uses of the legacy `gpt-image-2-all` model with `gpt-image-2` and standardize image workflows: no-reference generation uses POST /v1/images/generations, any-reference flows use POST /v1/images/edits with multipart `image` parts. Update SKILLs, generation scripts, decision logs, and docs to reflect the contract change and edits-vs-generations guidance. Apply corresponding changes across backend (api-server match3d/puzzle modules, openai image adapter, mappers, telemetry, spacetime client/module), frontend components and services (Match3D, Puzzle, CreativeImageInputPanel, runtime shells), and add new spritesheet/parser files and tests. Also add media/logo.png. These changes align repository code and documentation with the VectorEngine image API contract and update generation/upload handling (green-screen -> alpha processing, spritesheet handling, and related tests).

server-rs/crates/api-server/src/prompt/puzzle/image.rs

@@ -43,7 +43,7 @@ fn build_puzzle_image_prompt_text(_level_name: &str, prompt: &str) -> String {
         concat!(
             "请生成一张高清插画。",
             "画面主体：{prompt}。",
-            "画面要求：1:1",
+            "画面要求：输出画面比例为1：1，",
             "主体要清晰集中，前中后景层次明确，局部细节丰富但不要杂乱，",
             "避免文字、水印、边框和 UI 元素。"
         ),
@@ -77,7 +77,7 @@ mod tests {
         let prompt = build_puzzle_image_prompt("雨夜神庙", "猫咪在发光遗迹前寻找线索");
 
         assert!(prompt.contains("猫咪在发光遗迹前寻找线索"));
-        assert!(prompt.contains("1:1"));
+        assert!(prompt.contains("输出画面比例为1：1"));
         assert!(prompt.contains("主体要清晰集中"));
         assert!(prompt.contains("避免文字、水印、边框和 UI 元素"));
     }
@@ -90,7 +90,7 @@ mod tests {
         let prompt = build_puzzle_image_prompt(long_level_name.as_str(), long_description.as_str());
 
         assert!(prompt.chars().count() <= PUZZLE_TEXT_TO_IMAGE_PROMPT_MAX_CHARS);
-        assert!(prompt.contains("1:1"));
+        assert!(prompt.contains("输出画面比例为1：1"));
         assert!(prompt.contains("主体要清晰集中"));
         assert!(prompt.contains("避免文字、水印、边框和 UI 元素"));
     }