fix: honor Hermes local command override (#3503)

## Summary

This fixes the Hermes local adapter so that a configured command
override is respected during both environment tests and execution.

## Problem

The Hermes adapter expects `adapterConfig.hermesCommand`, but the
generic local command path in the UI was storing
`adapterConfig.command`.

As a result, changing the command in the UI did not reliably affect
runtime behavior. In real use, the adapter could still fall back to the
default `hermes` binary.

This showed up clearly in setups where Hermes is launched through a
wrapper command rather than installed directly on the host.

## What changed

- switched the Hermes local UI adapter to the Hermes-specific config
builder
- updated the configuration form to read and write `hermesCommand` for
`hermes_local`
- preserved the override correctly in the test-environment path
- added server-side normalization from legacy `command` to
`hermesCommand`

## Compatibility

The server-side normalization keeps older saved agent configs working,
including configs that still store the value under `command`.

## Validation

Validated against a Docker-based Hermes workflow using a local wrapper
exposed through a symlinked command:

- `Command = hermes-docker`
- environment test respects the override
- runs no longer fall back to `hermes`

Typecheck also passed for both UI and server.

Co-authored-by: NoronhaH <NoronhaH@users.noreply.github.com>

ui/src/components/AgentConfigForm.tsx

@@ -291,6 +291,8 @@ export function AgentConfigForm(props: AgentConfigFormProps) {
     enabled: Boolean(selectedCompanyId),
   });
   const models = fetchedModels ?? externalModels ?? [];
+  const adapterCommandField =
+    adapterType === "hermes_local" ? "hermesCommand" : "command";
   const {
     data: detectedModelData,
     refetch: refetchDetectedModel,
@@ -346,7 +348,19 @@ export function AgentConfigForm(props: AgentConfigFormProps) {
       return uiAdapter.buildAdapterConfig(val!);
     }
     const base = config as Record<string, unknown>;
-    return { ...base, ...overlay.adapterConfig };
+    const next = { ...base, ...overlay.adapterConfig };
+    if (adapterType === "hermes_local") {
+      const hermesCommand =
+        typeof next.hermesCommand === "string" && next.hermesCommand.length > 0
+          ? next.hermesCommand
+          : typeof next.command === "string" && next.command.length > 0
+            ? next.command
+            : undefined;
+      if (hermesCommand) {
+        next.hermesCommand = hermesCommand;
+      }
+    }
+    return next;
   }
 
   const testEnvironment = useMutation({
@@ -667,12 +681,20 @@ export function AgentConfigForm(props: AgentConfigFormProps) {
                   value={
                     isCreate
                       ? val!.command
-                      : eff("adapterConfig", "command", String(config.command ?? ""))
+                      : eff(
+                          "adapterConfig",
+                          adapterCommandField,
+                          String(
+                            (adapterType === "hermes_local"
+                              ? config.hermesCommand ?? config.command
+                              : config.command) ?? "",
+                          ),
+                        )
                   }
                   onCommit={(v) =>
                     isCreate
                       ? set!({ command: v })
-                      : mark("adapterConfig", "command", v || null)
+                      : mark("adapterConfig", adapterCommandField, v || null)
                   }
                   immediate
                   className={inputClass}