cleanup: tweak compaction prompt (#35220)

Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com>
Co-authored-by: opencode-agent[bot] <opencode-agent[bot]@users.noreply.github.com>

packages/opencode/test/session/compaction.test.ts

@@ -1430,8 +1430,8 @@ describe("session.compaction.process", () => {
         expect(captured).toContain("<previous-summary>")
         expect(captured).toContain("summary one")
         expect(captured.match(/summary one/g)?.length).toBe(1)
-        expect(captured).toContain("## Constraints & Preferences")
-        expect(captured).toContain("## Progress")
+        expect(captured).toContain("## Important Details")
+        expect(captured).toContain("## Work State")
       }).pipe(withCompaction({ llm: stub.llmLayer }))
     },
     { git: true },