refactor: remove legacy code (#1351)

* docs(agent-cleanup): add phased baseline

* chore(agent-cleanup): add static guard

* refactor(agent-cleanup): extract question tool

* refactor(agent-cleanup): extract env prompt

* refactor(agent-cleanup): extract session paths

* types(agent-cleanup): narrow mcp imports

* types(agent-cleanup): extract search result

* types(agent-cleanup): narrow message files

* types(agent-cleanup): isolate display messages

* types(agent-cleanup): narrow user message rendering

* types(agent-cleanup): narrow assistant shell

* types(agent-cleanup): clear active block path

* refactor(agent-cleanup): archive dead renderer code

* refactor(agent-cleanup): persist session skills

* refactor(agent-cleanup): extract skill runtime

* refactor(agent-cleanup): scope mcp access

* refactor(agent-cleanup): lazy legacy runtime

* refactor(agent-cleanup): tighten legacy access

* refactor(agent-cleanup): inject session runtime

* refactor(agent-cleanup): inject tool presenter

* refactor(agent-cleanup): add runtime ports

* refactor(agent-cleanup): inject provider mcp

* refactor(agent-cleanup): inject skill state

* refactor(agent-cleanup): retire legacy skills

* refactor(agent-cleanup): archive dead code

* docs(agent-cleanup): simplify checkpoint

Author: zerob13

archives/code/dead-code-batch-2/README.md

@@ -0,0 +1,36 @@
+# Dead Code Batch 2
+
+- Purpose: archive dead code that no longer participates in the active renderer or main runtime.
+- Archived at: 2026-03-15
+- Rationale: static inspection confirmed these files have no live code references and are kept in
+  source form for precise rollback only.
+
+## Archived Paths
+
+- `src/renderer/src/components/NewThreadMock.vue`
+- `src/renderer/src/components/mock/MockChatPage.vue`
+- `src/renderer/src/components/mock/MockInputBox.vue`
+- `src/renderer/src/components/mock/MockInputToolbar.vue`
+- `src/renderer/src/components/mock/MockMessageList.vue`
+- `src/renderer/src/components/mock/MockStatusBar.vue`
+- `src/renderer/src/components/mock/MockTopBar.vue`
+- `src/renderer/src/components/mock/MockWelcomePage.vue`
+- `src/renderer/src/composables/useMockViewState.ts`
+- `src/main/presenter/agentPresenter/tools/questionTool.ts`
+- `src/main/presenter/agentPresenter/message/systemEnvPromptBuilder.ts`
+- `src/main/presenter/agentPresenter/events.ts`
+- `src/main/presenter/agentPresenter/message/index.ts`
+- `src/main/presenter/agentPresenter/permission/index.ts`
+- `src/main/presenter/agentPresenter/session/index.ts`
+- `src/main/presenter/agentPresenter/streaming/index.ts`
+- `src/main/presenter/agentPresenter/tool/index.ts`
+- `src/main/presenter/agentPresenter/utility/index.ts`
+- `src/main/presenter/searchPrompts/index.ts`
+- `src/main/presenter/sessionPresenter/persistence/index.ts`
+- `src/main/presenter/sessionPresenter/tab/index.ts`
+
+## Notes
+
+- This directory is not part of the runtime, build, typecheck, or test target set.
+- Restore by moving files back to their original paths if a later audit proves they are still
+  needed.

…/main/presenter/agentPresenter/events.ts …/main/presenter/agentPresenter/events.tssrc/main/presenter/agentPresenter/events.ts renamed to archives/code/dead-code-batch-2/src/main/presenter/agentPresenter/events.ts src/main/presenter/agentPresenter/events.ts renamed to archives/code/dead-code-batch-2/src/main/presenter/agentPresenter/events.ts

@@ -0,0 +1,5 @@
+export {
+  buildRuntimeCapabilitiesPrompt,
+  buildSystemEnvPrompt,
+  type BuildSystemEnvPromptOptions
+} from '../../../lib/agentRuntime/systemEnvPromptBuilder'

…resenter/agentPresenter/message/index.ts …resenter/agentPresenter/message/index.tssrc/main/presenter/agentPresenter/message/index.ts renamed to archives/code/dead-code-batch-2/src/main/presenter/agentPresenter/message/index.ts src/main/presenter/agentPresenter/message/index.ts renamed to archives/code/dead-code-batch-2/src/main/presenter/agentPresenter/message/index.ts

@@ -0,0 +1,6 @@
+export {
+  parseQuestionToolArgs,
+  QUESTION_TOOL_NAME,
+  questionToolSchema,
+  type QuestionToolInput
+} from '../../../lib/agentRuntime/questionTool'