restore: recover deleted documentation, CI/CD, and infrastructure files

Restored from origin/main (b4663fb):
- .github/ workflows and issue templates
- .gitignore (proper exclusions)
- .opencode/agent/web_developer.md
- AGENTS.md, BUILD.md, PROGRESS.md
- dev-docs/ (9 architecture/implementation docs)
- docs/screenshots/ (4 UI screenshots)
- images/ (CodeNomad icons)
- package-lock.json (dependency lockfile)
- tasks/ (25+ project task files)

Also restored original source files that were modified:
- packages/ui/src/App.tsx
- packages/ui/src/lib/logger.ts
- packages/ui/src/stores/instances.ts
- packages/server/src/server/routes/workspaces.ts
- packages/server/src/workspaces/manager.ts
- packages/server/src/workspaces/runtime.ts
- packages/server/package.json

Kept new additions:
- Install-*.bat/.sh (enhanced installers)
- Launch-*.bat/.sh (new launchers)
- README.md (SEO optimized with GLM 4.7)

packages/ui/src/stores/instances.ts

@@ -34,11 +34,6 @@ const [logStreamingState, setLogStreamingState] = createSignal<Map<string, boole
 const [permissionQueues, setPermissionQueues] = createSignal<Map<string, Permission[]>>(new Map())
 const [activePermissionId, setActivePermissionId] = createSignal<Map<string, string | null>>(new Map())
 const permissionSessionCounts = new Map<string, Map<string, number>>()
-
-function syncHasInstancesFlag() {
-  const readyExists = Array.from(instances().values()).some((instance) => instance.status === "ready")
-  setHasInstances(readyExists)
-}
 interface DisconnectedInstanceInfo {
   id: string
   folder: string
@@ -73,6 +68,7 @@ function upsertWorkspace(descriptor: WorkspaceDescriptor) {
     updateInstance(descriptor.id, mapped)
   } else {
     addInstance(mapped)
+    setHasInstances(true)
   }
 
   if (descriptor.status === "ready") {
@@ -139,6 +135,9 @@ void (async function initializeWorkspaces() {
   try {
     const workspaces = await serverApi.fetchWorkspaces()
     workspaces.forEach((workspace) => upsertWorkspace(workspace))
+    if (workspaces.length === 0) {
+      setHasInstances(false)
+    }
   } catch (error) {
     log.error("Failed to load workspaces", error)
   }
@@ -160,6 +159,9 @@ function handleWorkspaceEvent(event: WorkspaceEventPayload) {
     case "workspace.stopped":
       releaseInstanceResources(event.workspaceId)
       removeInstance(event.workspaceId)
+      if (instances().size === 0) {
+        setHasInstances(false)
+      }
       break
     case "workspace.log":
       handleWorkspaceLog(event.entry)
@@ -247,7 +249,6 @@ function addInstance(instance: Instance) {
   })
   ensureLogContainer(instance.id)
   ensureLogStreamingState(instance.id)
-  syncHasInstancesFlag()
 }
 
 function updateInstance(id: string, updates: Partial<Instance>) {
@@ -259,7 +260,6 @@ function updateInstance(id: string, updates: Partial<Instance>) {
     }
     return next
   })
-  syncHasInstancesFlag()
 }
 
 function removeInstance(id: string) {
@@ -301,7 +301,6 @@ function removeInstance(id: string) {
   clearCacheForInstance(id)
   messageStoreBus.unregisterInstance(id)
   clearInstanceDraftPrompts(id)
-  syncHasInstancesFlag()
 }
 
 async function createInstance(folder: string, _binaryPath?: string): Promise<string> {
@@ -329,6 +328,9 @@ async function stopInstance(id: string) {
   }
 
   removeInstance(id)
+  if (instances().size === 0) {
+    setHasInstances(false)
+  }
 }
 
 async function fetchLspStatus(instanceId: string): Promise<LspStatus[] | undefined> {
@@ -588,6 +590,9 @@ async function acknowledgeDisconnectedInstance(): Promise<void> {
     log.error("Failed to stop disconnected instance", error)
   } finally {
     setDisconnectedInstance(null)
+    if (instances().size === 0) {
+      setHasInstances(false)
+    }
   }
 }