revert: restore patch fields for diff compatibility (#8970)

Reverts #8967 and #8953. OpenCode is migrating to use patch strings as
the primary diff transport — dropping them breaks forward compatibility
with upstream's SessionReview rendering pipeline, which falls back to
patch when before/after are absent.

packages/kilo-docs/source-links.md

@@ -1,7 +1,7 @@
 # Source Code Links
 
 <!-- Auto-generated by script/extract-source-links.ts — DO NOT EDIT -->
-<!-- 80 unique URLs extracted from extension and CLI source -->
+<!-- 79 unique URLs extracted from extension and CLI source -->
 
 - <https://api.apertis.ai/v1>
   <!-- packages/opencode/src/provider/model-cache.ts -->
@@ -55,8 +55,6 @@
   <!-- packages/kilo-vscode/webview-ui/src/components/settings/AboutKiloCodeTab.tsx -->
 - <https://github.com/Kilo-Org/kilocode/issues/6986>
   <!-- packages/kilo-vscode/src/agent-manager/constants.ts -->
-- <https://github.com/Kilo-Org/kilocode/issues/8951>
-  <!-- packages/kilo-vscode/src/review-utils.ts -->
 - <https://github.com/Kilo-Org/kilocode/issues/new?template=bug-report.yml>
   <!-- packages/opencode/src/cli/cmd/tui/app.tsx -->
 - <https://github.com/Kilo-Org/kilocode/issues/new/choose>