refactor: codebase audit cleanup — dead code, dedup, module splits

Multi-agent audit + aggressive cleanup across server/web/coder/booterm,
delivered behind a DEFER discipline so none of the in-flight files were
touched. Removes dead code/deps/columns, dedups server + coder helpers,
and splits the oversized modules (tools.ts, opencode-server.ts,
sentinel-summaries, turn.ts, TerminalPane.tsx) behind stable contracts.
Adds 78 parity/unit tests (server 587, coder 323); fixes two latent bugs
(ChatPane queue keys, FileViewerOverlay blank-line parity).

Intended tag: v2.7.12-audit-cleanup.

apps/server/src/services/tools/codecontext/get_dependencies.ts

@@ -1,8 +1,5 @@
-// v1.12 Track B.2: codecontext wrapper — get_dependencies.
-
 import { z } from 'zod';
-import type { ToolDef } from '../../tools.js';
-import { callCodecontext, type CodecontextResponse } from '../../codecontext_client.js';
+import { makeCodecontextTool } from './factory.js';
 
 export const GetDependenciesInput = z.object({
   file_path: z.string().trim().optional(),
@@ -16,45 +13,31 @@ const DESCRIPTION =
   'Tree-sitter coverage: full for JS/Python/Java/Go/Rust/C++. TypeScript dependencies are approximate. ' +
   'PHP and SQL are not supported.';
 
-export async function executeGetDependencies(
-  input: GetDependenciesInputT,
-  projectPath: string,
-  fetcher: typeof fetch = fetch,
-): Promise<CodecontextResponse> {
-  const args: Record<string, unknown> = {
-    direction: input.direction ?? 'both',
-  };
-  if (input.file_path) args['file_path'] = input.file_path;
-  return callCodecontext({ toolName: 'get_dependencies', args, projectPath }, fetcher);
-}
-
-export const getDependencies: ToolDef<GetDependenciesInputT> = {
-  name: 'get_dependencies',
-  description: DESCRIPTION,
-  inputSchema: GetDependenciesInput,
-  jsonSchema: {
-    type: 'function',
-    function: {
-      name: 'get_dependencies',
-      description: DESCRIPTION,
-      parameters: {
-        type: 'object',
-        properties: {
-          file_path: {
-            type: 'string',
-            description: 'Narrow to a single file. Omit for a project-wide graph.',
-          },
-          direction: {
-            type: 'string',
-            enum: ['incoming', 'outgoing', 'both'],
-            description: 'Which edges to include. Defaults to "both".',
-          },
+const { toolDef: getDependencies, execute: executeGetDependencies } =
+  makeCodecontextTool<GetDependenciesInputT>({
+    name: 'get_dependencies',
+    schema: GetDependenciesInput,
+    description: DESCRIPTION,
+    jsonParameters: {
+      type: 'object',
+      properties: {
+        file_path: {
+          type: 'string',
+          description: 'Narrow to a single file. Omit for a project-wide graph.',
+        },
+        direction: {
+          type: 'string',
+          enum: ['incoming', 'outgoing', 'both'],
+          description: 'Which edges to include. Defaults to "both".',
         },
-        additionalProperties: false,
       },
+      additionalProperties: false,
     },
-  },
-  async execute(input, projectRoot) {
-    return await executeGetDependencies(input, projectRoot);
-  },
-};
+    mapArgs: (input) => {
+      const args: Record<string, unknown> = { direction: input.direction ?? 'both' };
+      if (input.file_path) args['file_path'] = input.file_path;
+      return args;
+    },
+  });
+
+export { getDependencies, executeGetDependencies };