Add dedicated environment settings page and test-in-environment (#4798)

## Thinking Path

> - Paperclip orchestrates AI agents for zero-human companies
> - Agents run inside environments (local, SSH, E2B sandbox)
> - Operators need to configure and manage these environments
> - But environment settings were buried inside the general company
settings page, making them hard to find
> - Additionally, when testing an agent from the configuration form, the
test always ran locally regardless of which environment was selected
> - This PR moves environments into a dedicated top-level company
settings section and wires the "Test Environment" button to run inside
the selected environment
> - The benefit is operators can find and manage environments more
easily, and the test button now validates the actual environment the
agent will use

## What Changed

- Added a dedicated `CompanyEnvironments` settings page with its own
route and sidebar entry
- Updated `CompanySettingsSidebar` and `CompanySettingsNav` to include
the new environments section
- Modified the agent test route (`POST /agents/:id/test`) to accept an
optional `environmentId` parameter
- Updated all adapter `test.ts` handlers to resolve and use the
specified execution target environment
- Added `resolveTestExecutionTarget` to `execution-target.ts` for remote
environment test resolution with cwd fallback
- Moved the "Test Environment" button and its feedback display into the
`NewAgent` page footer for better UX flow

## Verification

- `pnpm test` — all existing and new tests pass
- `pnpm typecheck` — clean
- Manual: navigate to Company Settings, confirm "Environments" appears
as a top-level section
- Manual: configure an agent with a non-local environment, click "Test
Environment", confirm the test runs inside that environment

## Risks

- Low risk. UI-only routing change for the settings page. The
test-in-environment change adds an optional parameter with a local
fallback, so existing behavior is preserved when no environment is
specified.

## Model Used

Codex GPT 5.4 high via Paperclip.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

packages/adapters/opencode-local/src/server/test.ts

@@ -8,11 +8,15 @@ import {
   asString,
   asStringArray,
   parseObject,
-  ensureAbsoluteDirectory,
-  ensureCommandResolvable,
   ensurePathInEnv,
-  runChildProcess,
 } from "@paperclipai/adapter-utils/server-utils";
+import {
+  ensureAdapterExecutionTargetCommandResolvable,
+  ensureAdapterExecutionTargetDirectory,
+  runAdapterExecutionTargetProcess,
+  describeAdapterExecutionTarget,
+  resolveAdapterExecutionTargetCwd,
+} from "@paperclipai/adapter-utils/execution-target";
 import { discoverOpenCodeModels, ensureOpenCodeModelConfiguredAndAvailable } from "./models.js";
 import { parseOpenCodeJsonl } from "./parse.js";
 import { prepareOpenCodeRuntimeConfig } from "./runtime-config.js";
@@ -58,10 +62,28 @@ export async function testEnvironment(
   const checks: AdapterEnvironmentCheck[] = [];
   const config = parseObject(ctx.config);
   const command = asString(config.command, "opencode");
-  const cwd = asString(config.cwd, process.cwd());
+  const target = ctx.executionTarget ?? null;
+  const targetIsRemote = target?.kind === "remote";
+  const cwd = resolveAdapterExecutionTargetCwd(target, asString(config.cwd, ""), process.cwd());
+  const targetLabel = targetIsRemote
+    ? ctx.environmentName ?? describeAdapterExecutionTarget(target) ?? "remote environment"
+    : null;
+  const runId = `opencode-envtest-${Date.now()}-${Math.random().toString(16).slice(2)}`;
+
+  if (targetLabel) {
+    checks.push({
+      code: "opencode_environment_target",
+      level: "info",
+      message: `Probing inside environment: ${targetLabel}`,
+    });
+  }
 
   try {
-    await ensureAbsoluteDirectory(cwd, { createIfMissing: false });
+    await ensureAdapterExecutionTargetDirectory(runId, target, cwd, {
+      cwd,
+      env: {},
+      createIfMissing: false,
+    });
     checks.push({
       code: "opencode_cwd_valid",
       level: "info",
@@ -115,7 +137,7 @@ export async function testEnvironment(
       });
     } else {
       try {
-        await ensureCommandResolvable(command, cwd, runtimeEnv);
+        await ensureAdapterExecutionTargetCommandResolvable(command, target, cwd, runtimeEnv);
         checks.push({
           code: "opencode_command_resolvable",
           level: "info",
@@ -137,7 +159,19 @@ export async function testEnvironment(
     let modelValidationPassed = false;
     const configuredModel = asString(config.model, "").trim();
 
-    if (canRunProbe && configuredModel) {
+    // Model discovery and validation use local child processes against
+    // OpenCode's `models` subcommand and JSON config; these are not yet
+    // wired through the execution target. When probing a remote env, skip
+    // discovery/validation and rely on the remote hello probe to surface
+    // model/auth issues directly.
+    if (targetIsRemote && configuredModel) {
+      checks.push({
+        code: "opencode_model_validation_skipped_remote",
+        level: "info",
+        message: `Skipped local model validation; will be validated by the hello probe inside ${targetLabel}.`,
+      });
+      modelValidationPassed = true;
+    } else if (canRunProbe && configuredModel) {
       try {
         const discovered = await discoverOpenCodeModels({ command, cwd, env: runtimeEnv });
         if (discovered.length > 0) {
@@ -173,7 +207,7 @@ export async function testEnvironment(
           });
         }
       }
-    } else if (canRunProbe && !configuredModel) {
+    } else if (!targetIsRemote && canRunProbe && !configuredModel) {
       try {
         const discovered = await discoverOpenCodeModels({ command, cwd, env: runtimeEnv });
         if (discovered.length > 0) {
@@ -207,7 +241,7 @@ export async function testEnvironment(
     const modelUnavailable = checks.some((check) => check.code === "opencode_hello_probe_model_unavailable");
     if (!configuredModel && !modelUnavailable) {
       // No model configured – skip model requirement if no model-related checks exist
-    } else if (configuredModel && canRunProbe) {
+    } else if (!targetIsRemote && configuredModel && canRunProbe) {
       try {
         await ensureOpenCodeModelConfiguredAndAvailable({
           model: configuredModel,
@@ -246,8 +280,9 @@ export async function testEnvironment(
       if (extraArgs.length > 0) args.push(...extraArgs);
 
       try {
-        const probe = await runChildProcess(
-          `opencode-envtest-${Date.now()}-${Math.random().toString(16).slice(2)}`,
+        const probe = await runAdapterExecutionTargetProcess(
+          runId,
+          target,
           command,
           args,
           {