[Sync] LLM clients → Qwen3.6-35B-A3B-Thinking default, Ornith preset, fl GPU monitor abbrs

Re-export of private HEAD 73b4a65: default-model flip + 8k thinking budget
in the aichat/opencode/pi client configs, the Ornith-1.5-35B-A3B preset and
its gate bench in fl/.config/llamacpp, and the fl fish abbrs `vram` /
`vramx` with the new gpumon.sh (sysfs VRAM/GTT monitor).

common/.pi/agent/models.json

@@ -109,7 +109,7 @@
           "id": "Ornith-1.5-35B-A3B-IQ3_XXS",
           "name": "Ornith 1.5 35B · 24k · vision — agentic coder, thinking (~32 t/s)",
           "reasoning": true,
-          "compat": { "thinkingFormat": "qwen-chat-template" },
+          "compat": { "thinkingFormat": "qwen-chat-template", "thinkingTokenBudgetField": "thinking_budget_tokens" },
           "input": ["text", "image"],
           "contextWindow": 24576,
           "maxTokens": 4096,
@@ -244,7 +244,7 @@
           "id": "Ornith-1.5-35B-A3B-IQ3_XXS",
           "name": "Ornith 1.5 35B · 24k · vision — agentic coder, thinking (~32 t/s)",
           "reasoning": true,
-          "compat": { "thinkingFormat": "qwen-chat-template" },
+          "compat": { "thinkingFormat": "qwen-chat-template", "thinkingTokenBudgetField": "thinking_budget_tokens" },
           "input": ["text", "image"],
           "contextWindow": 24576,
           "maxTokens": 4096,