feat: login MAS OIDC end-to-end (issue 0147)

Backend Go:
- MatrixService with Login/GetSession/Logout bindings
- Uses 3 registry helpers via go.work:
  - mas_oidc_loopback_go_infra (PKCE flow)
  - keyring_token_store_go_infra (SO keychain)
  - matrix_client_init_go_infra (mautrix client)
- whoami helper to discover user_id+device_id pre-init

Frontend React+Vite+TS:
- Mantine v7 + @tabler/icons-react
- LoginScreen with 'Sign in with Matrix' button
- HomeScreen with profile card + logout
- Dark theme violet accent
- @mantine/notifications wired

Wails config:
- Switched to pnpm (workspace: protocol)
- Bindings auto-generated for MatrixService
- 1280x800 default window

Build: 68MB linux/amd64 binary in build/bin/

frontend/wailsjs/runtime/runtime.d.ts

@@ -21,8 +21,8 @@ export interface Size {
 export interface Screen {
     isCurrent: boolean;
     isPrimary: boolean;
-    width: number
-    height: number
+    width : number
+    height : number
 }
 
 // Environment information such as platform, buildtype, ...
@@ -38,19 +38,23 @@ export interface EnvironmentInfo {
 export function EventsEmit(eventName: string, ...data: any): void;
 
 // [EventsOn](https://wails.io/docs/reference/runtime/events#eventson) sets up a listener for the given event name.
-export function EventsOn(eventName: string, callback: (...data: any) => void): void;
+export function EventsOn(eventName: string, callback: (...data: any) => void): () => void;
 
 // [EventsOnMultiple](https://wails.io/docs/reference/runtime/events#eventsonmultiple)
 // sets up a listener for the given event name, but will only trigger a given number times.
-export function EventsOnMultiple(eventName: string, callback: (...data: any) => void, maxCallbacks: number): void;
+export function EventsOnMultiple(eventName: string, callback: (...data: any) => void, maxCallbacks: number): () => void;
 
 // [EventsOnce](https://wails.io/docs/reference/runtime/events#eventsonce)
 // sets up a listener for the given event name, but will only trigger once.
-export function EventsOnce(eventName: string, callback: (...data: any) => void): void;
+export function EventsOnce(eventName: string, callback: (...data: any) => void): () => void;
 
-// [EventsOff](https://wails.io/docs/reference/runtime/events#eventsff)
+// [EventsOff](https://wails.io/docs/reference/runtime/events#eventsoff)
 // unregisters the listener for the given event name.
-export function EventsOff(eventName: string): void;
+export function EventsOff(eventName: string, ...additionalEventNames: string[]): void;
+
+// [EventsOffAll](https://wails.io/docs/reference/runtime/events#eventsoffall)
+// unregisters all listeners.
+export function EventsOffAll(): void;
 
 // [LogPrint](https://wails.io/docs/reference/runtime/log#logprint)
 // logs the given message as a raw message
@@ -124,6 +128,10 @@ export function WindowFullscreen(): void;
 // Restores the previous window dimensions and position prior to full screen.
 export function WindowUnfullscreen(): void;
 
+// [WindowIsFullscreen](https://wails.io/docs/reference/runtime/window#windowisfullscreen)
+// Returns the state of the window, i.e. whether the window is in full screen mode or not.
+export function WindowIsFullscreen(): Promise<boolean>;
+
 // [WindowSetSize](https://wails.io/docs/reference/runtime/window#windowsetsize)
 // Sets the width and height of the window.
 export function WindowSetSize(width: number, height: number): void;
@@ -170,6 +178,10 @@ export function WindowToggleMaximise(): void;
 // Restores the window to the dimensions and position prior to maximising.
 export function WindowUnmaximise(): void;
 
+// [WindowIsMaximised](https://wails.io/docs/reference/runtime/window#windowismaximised)
+// Returns the state of the window, i.e. whether the window is maximised or not.
+export function WindowIsMaximised(): Promise<boolean>;
+
 // [WindowMinimise](https://wails.io/docs/reference/runtime/window#windowminimise)
 // Minimises the window.
 export function WindowMinimise(): void;
@@ -178,6 +190,14 @@ export function WindowMinimise(): void;
 // Restores the window to the dimensions and position prior to minimising.
 export function WindowUnminimise(): void;
 
+// [WindowIsMinimised](https://wails.io/docs/reference/runtime/window#windowisminimised)
+// Returns the state of the window, i.e. whether the window is minimised or not.
+export function WindowIsMinimised(): Promise<boolean>;
+
+// [WindowIsNormal](https://wails.io/docs/reference/runtime/window#windowisnormal)
+// Returns the state of the window, i.e. whether the window is normal or not.
+export function WindowIsNormal(): Promise<boolean>;
+
 // [WindowSetBackgroundColour](https://wails.io/docs/reference/runtime/window#windowsetbackgroundcolour)
 // Sets the background colour of the window to the given RGBA colour definition. This colour will show through for all transparent pixels.
 export function WindowSetBackgroundColour(R: number, G: number, B: number, A: number): void;
@@ -205,3 +225,25 @@ export function Hide(): void;
 // [Show](https://wails.io/docs/reference/runtime/intro#show)
 // Shows the application.
 export function Show(): void;
+
+// [ClipboardGetText](https://wails.io/docs/reference/runtime/clipboard#clipboardgettext)
+// Returns the current text stored on clipboard
+export function ClipboardGetText(): Promise<string>;
+
+// [ClipboardSetText](https://wails.io/docs/reference/runtime/clipboard#clipboardsettext)
+// Sets a text on the clipboard
+export function ClipboardSetText(text: string): Promise<boolean>;
+
+// [OnFileDrop](https://wails.io/docs/reference/runtime/draganddrop#onfiledrop)
+// OnFileDrop listens to drag and drop events and calls the callback with the coordinates of the drop and an array of path strings.
+export function OnFileDrop(callback: (x: number, y: number ,paths: string[]) => void, useDropTarget: boolean) :void
+
+// [OnFileDropOff](https://wails.io/docs/reference/runtime/draganddrop#dragandddropoff)
+// OnFileDropOff removes the drag and drop listeners and handlers.
+export function OnFileDropOff() :void
+
+// Check if the file path resolver is available
+export function CanResolveFilePaths(): boolean;
+
+// Resolves file paths for an array of files
+export function ResolveFilePaths(files: File[]): void