chore: update agent model configs

.opencode/agents/qa-tester.md

@@ -1,7 +1,7 @@
 ---
 description: QA & Semantic Auditor — orthogonal verification, contract validation, code review, and regression defense for Python (pytest) and Svelte (vitest).
 mode: all
-model: opencode-go/mimo-v2.5-pro
+model: opencode/qwen3.7-plus
 temperature: 0.1
 permission:
   edit: allow

.opencode/agents/reflection-agent.md

@@ -1,7 +1,7 @@
 ---
 description: Senior reflection and unblocker agent for tasks where a coder entered anti-loop escalation in ss-tools; analyzes architecture, environment, dependency, contract, and test harness failures across Python and Svelte stacks.
 mode: subagent
-model: deepseek/deepseek-v4-pro
+model: opencode-go/deepseek-v4-pro
 temperature: 0.0
 permission:
   edit: allow

.opencode/agents/svelte-coder.md

@@ -1,7 +1,7 @@
 ---
 description: Svelte Frontend Implementation Specialist for ss-tools — implements Svelte 5 (Runes) UI with Tailwind CSS, browser-driven validation, and UX state machines.
 mode: all
-model: opencode-go/deepseek-v4-flash
+model: deepseek/deepseek-v4-flash
 temperature: 0.1
 permission:
   edit: allow

.opencode/agents/swarm-master.md

@@ -1,7 +1,7 @@
 ---
 description: Strict subagent-only dispatcher for semantic and testing workflows; never performs the task itself and only delegates to worker subagents (python-coder, svelte-coder, fullstack-coder, qa-tester, reflection-agent, semantic-curator, closure-gate).
 mode: all
-model: deepseek/deepseek-v4-flash
+model: deepseek/deepseek-v4-pro
 temperature: 0.0
 permission:
   edit: deny