feat: milestones 6b-fix through 6e — default-editor, files plugin, workspace host, workspaceItems contribution

- Fix PluginCard openProviders display
- Add default-editor plugin (text/markdown/notes-context)
- Add files plugin with workspaceItems placement
- Add workspaceItems contribution point (Go + API + mock + SDK)
- Add WorkspaceHost component for workspace area
- WorkspaceTree dispatches selection event
- Fix default-editor layout to fill container
- Fix PluginCard unsafe .length access
- Add E2E tests: 34/34 pass
- Add bundle execution check to official-plugins check.sh
- Update docs: PLUGIN_RUNTIME, DEV_PLUGINS, MILESTONE_6B/6C/6D plans

frontend/wailsjs/go/api/App.d.ts

@@ -1,11 +1,11 @@
 // Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
 // This file is automatically generated. DO NOT EDIT
+import {workbench} from '../models';
 import {capability} from '../models';
 import {api} from '../models';
 import {permissions} from '../models';
 import {plugin} from '../models';
 import {files} from '../models';
-import {workbench} from '../models';
 
 export function ArchiveWorkspaceNode(arg1:string):Promise<string>;
 
@@ -19,12 +19,12 @@ export function CreateWorkspaceNode(arg1:string,arg2:string,arg3:string):Promise
 
 export function DisablePlugin(arg1:string):Promise<string>;
 
+export function EditWorkbenchResource(arg1:string,arg2:Record<string, any>):Promise<workbench.OpenResourceResult|string>;
+
 export function EnablePlugin(arg1:string):Promise<string>;
 
 export function ExecutePluginCommand(arg1:string,arg2:string,arg3:Record<string, any>):Promise<Record<string, any>|string>;
 
-export function EditWorkbenchResource(arg1:string,arg2:Record<string, any>):Promise<workbench.OpenResourceResult|string>;
-
 export function GetAppSettings():Promise<Record<string, any>>;
 
 export function GetCapabilities():Promise<Array<capability.Entry>>;
@@ -49,12 +49,12 @@ export function GetVaultPluginState():Promise<Record<string, any>>;
 
 export function GetVaultStatus():Promise<Record<string, string>>;
 
-export function GetWorkspaceTree():Promise<Record<string, any>>;
-
 export function GetWorkbenchOpenedResources():Promise<Array<workbench.OpenedResource>>;
 
 export function GetWorkbenchPreferences():Promise<workbench.Preferences>;
 
+export function GetWorkspaceTree():Promise<Record<string, any>>;
+
 export function ListPluginCapabilities(arg1:string):Promise<Array<capability.Entry>|string>;
 
 export function ListVaultFiles(arg1:string,arg2:string):Promise<Array<files.FileEntry>|string>;

frontend/wailsjs/go/api/App.js

@@ -26,6 +26,10 @@ export function DisablePlugin(arg1) {
   return window['go']['api']['App']['DisablePlugin'](arg1);
 }
 
+export function EditWorkbenchResource(arg1, arg2) {
+  return window['go']['api']['App']['EditWorkbenchResource'](arg1, arg2);
+}
+
 export function EnablePlugin(arg1) {
   return window['go']['api']['App']['EnablePlugin'](arg1);
 }
@@ -34,10 +38,6 @@ export function ExecutePluginCommand(arg1, arg2, arg3) {
   return window['go']['api']['App']['ExecutePluginCommand'](arg1, arg2, arg3);
 }
 
-export function EditWorkbenchResource(arg1, arg2) {
-  return window['go']['api']['App']['EditWorkbenchResource'](arg1, arg2);
-}
-
 export function GetAppSettings() {
   return window['go']['api']['App']['GetAppSettings']();
 }
@@ -86,10 +86,6 @@ export function GetVaultStatus() {
   return window['go']['api']['App']['GetVaultStatus']();
 }
 
-export function GetWorkspaceTree() {
-  return window['go']['api']['App']['GetWorkspaceTree']();
-}
-
 export function GetWorkbenchOpenedResources() {
   return window['go']['api']['App']['GetWorkbenchOpenedResources']();
 }
@@ -98,6 +94,10 @@ export function GetWorkbenchPreferences() {
   return window['go']['api']['App']['GetWorkbenchPreferences']();
 }
 
+export function GetWorkspaceTree() {
+  return window['go']['api']['App']['GetWorkspaceTree']();
+}
+
 export function ListPluginCapabilities(arg1) {
   return window['go']['api']['App']['ListPluginCapabilities'](arg1);
 }