chore: fix preview routes, MarkdownRenderer, update opencode config

- _preview_routes.py: fix preview endpoint params for multi-language
- MarkdownRenderer.svelte: renderer fixes for assistant messages
- speckit.analyze.md: update opencode command for spec analysis
- opencode.jsonc: config alignment

backend/src/api/routes/translate/_preview_routes.py

@@ -1,6 +1,6 @@
-# #region TranslatePreviewRoutesModule [C:3] [TYPE Module] [SEMANTICS fastapi, translate, preview, review, api, search]
+# #region TranslatePreviewRoutesModule [C:3] [TYPE Module] [SEMANTICS fastapi, translate, preview, api]
 # @defgroup Api Module group.
-# @BRIEF Translation Preview session management routes.
+# @BRIEF Translation Preview session management routes — generate preview, fetch records.
 # @LAYER API
 
 
@@ -13,11 +13,7 @@ from ....core.logger import logger
 from ....dependencies import get_config_manager, get_current_user, has_permission
 from ....plugins.translate.preview import TranslationPreview
 from ....schemas.auth import User
-from ....schemas.translate import (
-    PreviewRequest,
-    PreviewRow,
-    PreviewRowUpdate,
-)
+from ....schemas.translate import PreviewRequest, PreviewRow
 from ._router import router
 
 # ============================================================
@@ -61,92 +57,6 @@ async def preview_translation(
 # #endregion preview_translation
 
 
-# #region update_preview_row [C:4] [TYPE Function]
-# @ingroup Api
-# @BRIEF Approve, edit, or reject a preview row (optionally per language).
-# @PRE  User has translate.job.execute permission.
-# @POST  Preview row status is updated.
-@router.put("/jobs/{job_id}/preview/rows/{row_key}")
-async def update_preview_row(
-    job_id: str,
-    row_key: str,
-    payload: PreviewRowUpdate,
-    current_user: User = Depends(get_current_user),
-    _ = Depends(has_permission("translate.job", "EXECUTE")),
-    db: Session = Depends(get_db),
-    config_manager: ConfigManager = Depends(get_config_manager),
-):
-    """Approve, edit, or reject a preview row (optionally per language)."""
-    logger.reason(f"update_preview_row — Job: {job_id}, Row: {row_key}, Action: {payload.action}, Lang: {payload.language_code}", extra={"src": "translate_routes"})
-    try:
-        preview_service = TranslationPreview(db, config_manager, current_user.username)
-        result = preview_service.update_preview_row(
-            job_id=job_id,
-            row_id=row_key,
-            action=payload.action,
-            translation=payload.translation,
-            feedback=payload.feedback,
-            language_code=payload.language_code,
-        )
-        return result
-    except ValueError as e:
-        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))
-# #endregion update_preview_row
-
-
-# #region accept_preview_session [C:4] [TYPE Function]
-# @ingroup Api
-# @BRIEF Accept a preview session, marking it as the quality gate for full execution.
-# @PRE  User has translate.job.execute permission. Job has an ACTIVE preview session.
-# @POST  Preview session is marked as APPLIED; full execution can proceed.
-@router.post("/jobs/{job_id}/preview/accept")
-async def accept_preview_session(
-    job_id: str,
-    current_user: User = Depends(get_current_user),
-    _ = Depends(has_permission("translate.job", "EXECUTE")),
-    db: Session = Depends(get_db),
-    config_manager: ConfigManager = Depends(get_config_manager),
-):
-    """Accept a preview session, enabling full translation execution."""
-    logger.reason(f"accept_preview_session — Job: {job_id}, User: {current_user.username}", extra={"src": "translate_routes"})
-    try:
-        preview_service = TranslationPreview(db, config_manager, current_user.username)
-        result = preview_service.accept_preview_session(job_id=job_id)
-        return result
-    except ValueError as e:
-        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))
-# #endregion accept_preview_session
-
-
-# #region apply_preview [C:4] [TYPE Function]
-# @ingroup Api
-# @BRIEF Apply a preview session (alias for accept when accepting at session level).
-# @PRE  User has translate.job.execute permission.
-# @POST  Preview is applied.
-@router.post("/preview/{session_id}/apply")
-async def apply_preview(
-    session_id: str,
-    current_user: User = Depends(get_current_user),
-    _ = Depends(has_permission("translate.job", "EXECUTE")),
-    db: Session = Depends(get_db),
-    config_manager: ConfigManager = Depends(get_config_manager),
-):
-    """Apply a preview session by session ID."""
-    logger.reason(f"apply_preview — Session: {session_id}, User: {current_user.username}", extra={"src": "translate_routes"})
-    # Find job_id from session
-    from ....models.translate import TranslationPreviewSession
-    session = db.query(TranslationPreviewSession).filter(TranslationPreviewSession.id == session_id).first()
-    if not session:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=f"Preview session '{session_id}' not found")
-    try:
-        preview_service = TranslationPreview(db, config_manager, current_user.username)
-        result = preview_service.accept_preview_session(job_id=session.job_id)
-        return result
-    except ValueError as e:
-        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(e))
-# #endregion apply_preview
-
-
 # ============================================================
 # Preview Records
 # ============================================================
@@ -156,7 +66,6 @@ async def apply_preview(
 # @BRIEF Get records for a preview session.
 # @PRE User has translate.job.view permission.
 # @POST Returns list of preview records.
-# @COMPLEXITY 4
 
 @router.get("/preview/{session_id}/records", response_model=list[PreviewRow])
 async def get_preview_records(