feat(serve): upgrade daily driver to qwen3.6-35b-a3b q6_k_xl

Switch `make serve` default to Qwen3.6 UD Q6_K_XL (32 GB, hybrid
DeltaNet, near-lossless) and register it in the model catalog. Add
--jinja to the llama-server launcher so tool/function calling works —
without it clients silently ignore tool definitions advertised by the
server.

scripts/serve/launch.sh

@@ -106,6 +106,7 @@ SERVER_ARGS=(
     -ngl 99                          # Full GPU offload
     --no-mmap                        # Direct load, no mmap overhead
     -fa on                            # Flash attention
+    --jinja                          # Required for tool calling (clients ignored without it)
     -m "$TOOLBOX_MODEL_PATH"
     -c "$CTX_SIZE"                   # Context size
     --cache-type-k q4_0              # KV cache quantization (fastest on Vulkan)