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>

tests/unit/openai-to-kiro.test.js

@@ -2,21 +2,21 @@
  * Unit tests for open-sse/translator/request/openai-to-kiro.js
  *
  * Tests cover:
- *  - buildKiroPayload() - basic message conversion
+ *  - openaiToKiroRequest() - basic message conversion
  *  - Image forwarding fix: images in currentMessage must be included in payload
  */
 
 import { describe, it, expect } from "vitest";
-import { buildKiroPayload } from "../../open-sse/translator/request/openai-to-kiro.js";
+import { openaiToKiroRequest } from "../../open-sse/translator/request/openai-to-kiro.js";
 
-describe("buildKiroPayload", () => {
+describe("openaiToKiroRequest", () => {
   describe("basic message conversion", () => {
     it("should convert a simple text message", () => {
       const body = {
         messages: [{ role: "user", content: "Hello" }]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
 
       const currentMsg = result.conversationState.currentMessage;
       expect(currentMsg.userInputMessage.content).toContain("Hello");
@@ -29,7 +29,7 @@ describe("buildKiroPayload", () => {
         messages: [{ role: "user", content: "No images here" }]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
 
       const currentMsg = result.conversationState.currentMessage;
       expect(currentMsg.userInputMessage.images).toBeUndefined();
@@ -51,7 +51,7 @@ describe("buildKiroPayload", () => {
         ]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
 
       const currentMsg = result.conversationState.currentMessage;
       expect(currentMsg.userInputMessage.images).toBeDefined();
@@ -75,7 +75,7 @@ describe("buildKiroPayload", () => {
         ]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
 
       const currentMsg = result.conversationState.currentMessage;
       expect(currentMsg.userInputMessage.images).toHaveLength(2);
@@ -95,7 +95,7 @@ describe("buildKiroPayload", () => {
         ]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
 
       const currentMsg = result.conversationState.currentMessage;
       expect(currentMsg.userInputMessage.images).toBeUndefined();
@@ -115,7 +115,7 @@ describe("buildKiroPayload", () => {
         ]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
 
       const currentMsg = result.conversationState.currentMessage;
       expect(currentMsg.userInputMessage.content).toContain("What is in this image?");
@@ -135,7 +135,7 @@ describe("buildKiroPayload", () => {
         ]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
 
       const currentMsg = result.conversationState.currentMessage;
       // HTTP URLs are not supported by Kiro — converted to text placeholder
@@ -166,7 +166,7 @@ describe("buildKiroPayload", () => {
         // note: no `tools`
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
       const cs = result.conversationState;
 
       // No structured tool content anywhere
@@ -201,7 +201,7 @@ describe("buildKiroPayload", () => {
         ]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
       const cs = result.conversationState;
 
       const allJson = JSON.stringify(cs);
@@ -233,7 +233,7 @@ describe("buildKiroPayload", () => {
         ]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
       const cs = result.conversationState;
 
       // Structured tool spec carried on currentMessage
@@ -270,7 +270,7 @@ describe("buildKiroPayload", () => {
         ]
       };
 
-      const result = buildKiroPayload("claude-sonnet-4.6", body, true, {});
+      const result = openaiToKiroRequest("claude-sonnet-4.6", body, true, {});
       const cs = result.conversationState;
       const allJson = JSON.stringify(cs);