refactor(open-sse): translator DRY + schema enums, bug fixes, dead code cleanup

- Bug B1-B7: media UI m.kind||m.type, serviceKinds, gemini mediaPriority, schema kind, models/info lookup by kind
- Dead code D1-D6: safeParseJSON, drop PROVIDER_ENDPOINTS, orphan fetcher, GITHUB_CONFIG derive, getProviderConfig internal, legacy kiro file
- Translator concerns: toOpenAIUsage, toOpenAIFinish (gemini/kiro/ollama + fix kiro tool finish), thinking effort maps
- Reorg helpers/ → concerns/ (logic) + formats/ (per-format) + schema/ (pure enums: roles/blocks/finishReasons/defaults)
- Wire ~280 hardcoded role/block/finish/default literals to schema enums across 20+ files
- collapseTextParts + extractTextContent dedup
- Normalize translator fn names to openaiToXRequest / xToOpenAIResponse
- Golden tests lock behavior; 0 regression (byte-for-byte providers/alias, 26=26 known fails)

Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/translator/formats/maxTokens.js

@@ -0,0 +1,27 @@
+import { DEFAULT_MAX_TOKENS, DEFAULT_MIN_TOKENS } from "../../config/runtimeConfig.js";
+
+/**
+ * Adjust max_tokens based on request context
+ * @param {object} body - Request body
+ * @returns {number} Adjusted max_tokens
+ */
+export function adjustMaxTokens(body) {
+  let maxTokens = body.max_tokens || DEFAULT_MAX_TOKENS;
+
+  // Auto-increase for tool calling to prevent truncated arguments
+  if (body.tools && Array.isArray(body.tools) && body.tools.length > 0) {
+    if (maxTokens < DEFAULT_MIN_TOKENS) {
+      maxTokens = DEFAULT_MIN_TOKENS;
+    }
+  }
+
+  // Ensure max_tokens > thinking.budget_tokens (Claude API requirement)
+  // Claude API requires strictly greater, so add buffer instead of using DEFAULT_MAX_TOKENS
+  // which could equal budget_tokens when budget_tokens >= 64000
+  if (body.thinking?.budget_tokens && maxTokens <= body.thinking.budget_tokens) {
+    maxTokens = body.thinking.budget_tokens + 1024;
+  }
+
+  return maxTokens;
+}
+