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/spacetime-client/src/telemetry.rs

@@ -81,7 +81,9 @@ fn spacetime_metrics() -> &'static SpacetimeMetrics {
             read_duration_ms: meter
                 .f64_histogram("genarrative.spacetime.read.duration_ms")
                 .with_unit("ms")
-                .with_description("SpacetimeDB local subscription cache read duration in milliseconds")
+                .with_description(
+                    "SpacetimeDB local subscription cache read duration in milliseconds",
+                )
                 .build(),
         }
     })