frank-default-large: switch MTP draft head to agentionai ROCmFP4-FAST

The EasiiX Q8_0 draft was incompatible with STRIX_LEAN (missing
blk.0.hc_attn_norm.weight). Switched to agentionai/Qwen3.8-Flash-Next-
MTP-ROCmFP4-FAST-GGUF (2.28 GiB, ROCmFP4-FAST quant matched to target).
n_max 3 per the HF card (n_max 4 measured worse). SPEC_TYPE=draft-mtp,ngram-mod.

scripts/frank-default-large.env

@@ -87,15 +87,14 @@ HSA_OVERRIDE_GFX_VERSION=11.5.1
 
 VERBOSITY=4
 
-# MTP draft head (speculative decoding).  The MTP head from
-# Qwen/Qwen3.8-Flash-Next, exported as a standalone Q8_0 GGUF sidecar by
-# EasiiX/Qwen3.8-Flash-Next-MTP-Strix-Halo-GGUF.  Architecture qwen4exp,
-# matching the main model.  Measured +50% decode on code at temp 0 on
-# Strix Halo (gfx1151).  Set SPEC_TYPE=none to disable.
-DRAFT_MODEL_DIR=/home/dank/models/mtp-Qwen3.8-Flash-Next
-DRAFT_MODEL_FILE=mtp-Qwen3.8-Flash-Next-Q8_0.gguf
+# MTP draft head (speculative decoding).  agentionai
+# Qwen3.8-Flash-Next-MTP-ROCmFP4-FAST-GGUF, 2.28 GiB, ROCmFP4-FAST
+# quant matched to the target.  n_max 3 per the HF card (n_max 4
+# measured worse).  Set SPEC_TYPE=none to disable spec decoding.
+DRAFT_MODEL_DIR=/home/dank/models/mtp-Qwen3.8-Flash-Next-FAST
+DRAFT_MODEL_FILE=Qwen3.8-Flash-Next-MTP-ROCmFP4-FAST.gguf
 SPEC_TYPE=draft-mtp,ngram-mod
-SPEC_DRAFT_N_MAX=4
+SPEC_DRAFT_N_MAX=3
 SPEC_DRAFT_N_MIN=0
 SPEC_DRAFT_P_MIN=0.75
 SPEC_DRAFT_NGL=999