Fix all top-level dev tasks treating engine as enabled (#6705)

# Description of Changes
Currently, `task dev` explicitly calls the backend with
`AIENGINE_ENABLED=true` even though it isn't being spawned, so you just
get a dead FAB in the UI. This PR fixes it so that the engine will only
be enabled for tasks that will actually spawn the engine.

It also fixes a bug with the chat which makes it unusable locally. The
API path was not going through `apiClient` so for local dev you end up
with `//api/v1/...` which is not a valid path, so you get CORS errors
when trying to connect to the AI engine.

.taskfiles/backend.yml

@@ -23,6 +23,7 @@ tasks:
         vars:
           PORT: '{{.PORT}}'
           AIENGINE_URL: '{{.AIENGINE_URL}}'
+          AIENGINE_ENABLED: '{{.AIENGINE_ENABLED}}'
           AIENGINE_TIMEOUTSECONDS: '{{.AIENGINE_TIMEOUTSECONDS}}'
 
   dev:proprietary:
@@ -31,13 +32,14 @@ tasks:
     vars:
       PORT: '{{.PORT | default "8080"}}'
       AIENGINE_URL: '{{.AIENGINE_URL | default ""}}'
+      AIENGINE_ENABLED: '{{.AIENGINE_ENABLED | default "false"}}'
       AIENGINE_TIMEOUTSECONDS: '{{.AIENGINE_TIMEOUTSECONDS | default "120"}}'
     env:
       SERVER_PORT: '{{.PORT}}'
     cmds:
-      - cmd: '{{if .AIENGINE_URL}}AIENGINE_URL={{.AIENGINE_URL}} AIENGINE_ENABLED=true AIENGINE_TIMEOUTSECONDS={{.AIENGINE_TIMEOUTSECONDS}} {{end}}cmd /c ".\gradlew.bat :stirling-pdf:bootRun"'
+      - cmd: '{{if .AIENGINE_URL}}AIENGINE_URL={{.AIENGINE_URL}} AIENGINE_ENABLED={{.AIENGINE_ENABLED}} AIENGINE_TIMEOUTSECONDS={{.AIENGINE_TIMEOUTSECONDS}} {{end}}cmd /c ".\gradlew.bat :stirling-pdf:bootRun"'
         platforms: [windows]
-      - cmd: '{{if .AIENGINE_URL}}AIENGINE_URL={{.AIENGINE_URL}} AIENGINE_ENABLED=true AIENGINE_TIMEOUTSECONDS={{.AIENGINE_TIMEOUTSECONDS}} {{end}}./gradlew :stirling-pdf:bootRun'
+      - cmd: '{{if .AIENGINE_URL}}AIENGINE_URL={{.AIENGINE_URL}} AIENGINE_ENABLED={{.AIENGINE_ENABLED}} AIENGINE_TIMEOUTSECONDS={{.AIENGINE_TIMEOUTSECONDS}} {{end}}./gradlew :stirling-pdf:bootRun'
         platforms: [linux, darwin]
 
   dev:bundled:
@@ -60,12 +62,13 @@ tasks:
       # Override to "" to run the pure `saas` profile against your own SAAS_DB_*.
       PROFILES: '{{.PROFILES | default "dev"}}'
       AIENGINE_URL: '{{.AIENGINE_URL | default ""}}'
+      AIENGINE_ENABLED: '{{.AIENGINE_ENABLED | default "false"}}'
       AIENGINE_TIMEOUTSECONDS: '{{.AIENGINE_TIMEOUTSECONDS | default "120"}}'
     env:
       SERVER_PORT: '{{.PORT}}'
       STIRLING_FLAVOR: saas
       AIENGINE_URL: '{{.AIENGINE_URL}}'
-      AIENGINE_ENABLED: '{{if .AIENGINE_URL}}true{{else}}false{{end}}'
+      AIENGINE_ENABLED: '{{.AIENGINE_ENABLED}}'
       AIENGINE_TIMEOUTSECONDS: '{{.AIENGINE_TIMEOUTSECONDS}}'
     cmds:
       - cmd: cmd /c ".\gradlew.bat :stirling-pdf:bootRun {{if .PROFILES}}--args=\"--spring.profiles.include={{.PROFILES}}\"{{end}}"

Taskfile.yml

@@ -87,6 +87,7 @@ tasks:
         vars:
           PORT: '{{.BACKEND_PORT}}'
           AIENGINE_URL: 'http://localhost:{{.ENGINE_PORT}}'
+          AIENGINE_ENABLED: "true"
       - task: 'frontend:dev:{{.FRONTEND}}'
         vars:
           PORT: '{{.FRONTEND_PORT}}'

frontend/editor/src/core/services/aiBaseUrl.ts

@@ -8,5 +8,5 @@ import { getApiBaseUrl } from "@app/services/apiClientConfig";
  * the SaaS backend, since the AI engine only runs in the cloud.
  */
 export function getAiBaseUrl(): string {
-  return getApiBaseUrl();
+  return getApiBaseUrl().replace(/\/$/, ""); // Remove trailing slash
 }

frontend/editor/src/prototypes/components/chat/ChatContext.tsx

@@ -9,7 +9,7 @@ import {
 import { useAllFiles, useFileActions } from "@app/contexts/FileContext";
 import { generateId } from "@app/utils/generateId";
 import apiClient from "@app/services/apiClient";
-import { getApiBaseUrl } from "@app/services/apiClientConfig";
+import { getAiBaseUrl } from "@app/services/aiBaseUrl";
 import { getAuthHeaders } from "@app/services/apiClientSetup";
 import { createChildStub } from "@app/contexts/file/fileActions";
 import {
@@ -442,7 +442,7 @@ export function ChatProvider({ children }: { children: ReactNode }) {
         });
 
         const response = await fetch(
-          `${getApiBaseUrl()}/api/v1/ai/orchestrate/stream`,
+          `${getAiBaseUrl()}/api/v1/ai/orchestrate/stream`,
           {
             method: "POST",
             body: formData,