[diffusion] doc: fix diffusion docs and cookbook drift (#29302)

docs_new/docs/sglang-diffusion/api/cli.mdx

@@ -83,6 +83,7 @@ Use `sglang generate --help` and `sglang serve --help` for the full argument lis
 - `--sp-degree {N}`: sequence parallelism size
 - `--ulysses-degree {N}` and `--ring-degree {N}`: USP parallelism controls
 - `--enable-cfg-parallel {true|false}`: enable or explicitly disable CFG parallelism
+- `--warmup-mode {off|request|server}`: control startup warmup for `sglang serve`; `off` skips warmup, `request` primes the request path, and `server` runs a full synthetic server warmup before serving traffic
 - `--attention-backend {BACKEND}`: attention backend for native SGLang and diffusers pipelines
 - `--component-attention-backends {MAP}`: per-component attention backend overrides, for example `text_encoder=torch_sdpa,transformer=fa`
 - `--attention-backend-config {CONFIG}`: attention backend configuration

docs_new/docs/sglang-diffusion/caching-acceleration.mdx

@@ -45,7 +45,11 @@ SGLang supports two complementary caching approaches:
 [Cache-DiT](https://github.com/vipshop/cache-dit) provides block-level caching with
 advanced strategies like DBCache and TaylorSeer. It can achieve up to **1.69x speedup**.
 
-See [cache_dit.md](./cache_dit) for detailed configuration.
+See [Cache-DiT](./cache_dit) for detailed configuration.
+
+<Note>
+Cache-DiT currently cannot be combined with `--use-fsdp-inference`. Keep FSDP disabled when enabling Cache-DiT, or use other residency/offload controls instead.
+</Note>
 
 ### Quick Start
 
@@ -65,7 +69,7 @@ sglang generate --model-path Qwen/Qwen-Image \
 
 TeaCache (Temporal similarity-based caching) accelerates diffusion inference by detecting when consecutive denoising steps are similar enough to skip computation entirely.
 
-See [teacache.md](./teacache) for detailed documentation.
+See [TeaCache](./teacache) for detailed documentation.
 
 ### Quick Overview