backend: display a popup error when an unrecoverable panic occurs (#553)

Fixes #279 

At first I wanted to test if uninstalling WebView2 properly and running
the installer does what it is supposed to do and install it for you.

However, since mid-2023 -- Microsoft has made WebView2 a **required
system dependency of the operating system itself**, and therefore you
**cannot easily uninstall it**. This is something I don't want to mess
with on my own machine.

So instead I added a clear popup (where if you are on windows, it'll
tell you to get WebView2) when a panic occurs. Instead of hoping people
find the crash report file on their desktop.


![image](https://github.com/user-attachments/assets/97dda538-96be-433a-965c-e3ddf6a59f3e)

src-tauri/Cargo.lock

@@ -131,6 +131,12 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
+[[package]]
+name = "ascii"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d92bec98840b8f03a5ff5413de5293bfcd8bf96467cf5452609f939ec6f5de16"
+
 [[package]]
 name = "ash"
 version = "0.38.0+1.3.281"
@@ -660,6 +666,22 @@ dependencies = [
  "objc",
 ]
 
+[[package]]
+name = "cocoa"
+version = "0.25.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6140449f97a6e97f9511815c5632d84c8aacf8ac271ad77c559218161a1373c"
+dependencies = [
+ "bitflags 1.3.2",
+ "block",
+ "cocoa-foundation",
+ "core-foundation",
+ "core-graphics 0.23.2",
+ "foreign-types 0.5.0",
+ "libc",
+ "objc",
+]
+
 [[package]]
 name = "cocoa-foundation"
 version = "0.1.2"
@@ -2374,6 +2396,15 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1c173a5686ce8bfa551b3563d0c2170bf24ca44da99c7ca4bfdab5418c3fe57"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "0.4.8"
@@ -2768,6 +2799,29 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "native-dialog"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84e7038885d2aeab236bd60da9e159a5967b47cde3292da3b15ff1bec27c039f"
+dependencies = [
+ "ascii",
+ "block",
+ "cocoa 0.25.0",
+ "core-foundation",
+ "dirs-next",
+ "objc",
+ "objc-foundation",
+ "objc_id",
+ "once_cell",
+ "raw-window-handle 0.5.2",
+ "thiserror",
+ "versions",
+ "wfd",
+ "which",
+ "winapi",
+]
+
 [[package]]
 name = "native-tls"
 version = "0.2.12"
@@ -3126,6 +3180,7 @@ dependencies = [
  "futures-util",
  "glob",
  "log",
+ "native-dialog",
  "reqwest 0.12.7",
  "rev_buf_reader",
  "rustc-serialize",
@@ -4650,7 +4705,7 @@ dependencies = [
  "bitflags 1.3.2",
  "cairo-rs",
  "cc",
- "cocoa",
+ "cocoa 0.24.1",
  "core-foundation",
  "core-graphics 0.22.3",
  "crossbeam-channel",
@@ -4724,7 +4779,7 @@ checksum = "0e33e3ba00a3b05eb6c57ef135781717d33728b48acf914bb05629e74d897d29"
 dependencies = [
  "anyhow",
  "bytes",
- "cocoa",
+ "cocoa 0.24.1",
  "dirs-next",
  "dunce",
  "embed_plist",
@@ -4862,7 +4917,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "18c447dcd9b0f09c7dc4b752cc33e72788805bfd761fbda5692d30c48289efec"
 dependencies = [
  "arboard",
- "cocoa",
+ "cocoa 0.24.1",
  "gtk",
  "percent-encoding",
  "rand 0.8.5",
@@ -5433,6 +5488,16 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
+[[package]]
+name = "versions"
+version = "5.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c73a36bc44e3039f51fbee93e39f41225f6b17b380eb70cc2aab942df06b34dd"
+dependencies = [
+ "itertools",
+ "nom",
+]
+
 [[package]]
 name = "vswhom"
 version = "0.1.0"
@@ -5738,6 +5803,16 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "53a85b86a771b1c87058196170769dd264f66c0782acf1ae6cc51bfd64b39082"
 
+[[package]]
+name = "wfd"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e713040b67aae5bf1a0ae3e1ebba8cc29ab2b90da9aa1bff6e09031a8a41d7a8"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "wgpu"
 version = "22.1.0"
@@ -5844,6 +5919,18 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "which"
+version = "4.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87ba24419a2078cd2b0f2ede2691b6c66d8e47836da3b6db8265ebad47afbfc7"
+dependencies = [
+ "either",
+ "home",
+ "once_cell",
+ "rustix",
+]
+
 [[package]]
 name = "widestring"
 version = "1.1.0"
@@ -6435,7 +6522,7 @@ checksum = "c55c80b12287eb1ff7c365fc2f7a5037cb6181bd44c9fce81c8d1cf7605ffad6"
 dependencies = [
  "base64 0.13.1",
  "block",
- "cocoa",
+ "cocoa 0.24.1",
  "core-graphics 0.22.3",
  "crossbeam-channel",
  "dunce",

src-tauri/Cargo.toml

@@ -42,6 +42,7 @@ wgpu = "22.1.0"
 zip = { version = "2.2.0", features = ["deflate-zlib-ng"] }
 zip-extract = "0.2.1"
 tempfile = "3.12.0"
+native-dialog = "0.7.0"
 
 [target.'cfg(windows)'.dependencies]
 winreg = "0.52.0"

src-tauri/src/main.rs

@@ -10,6 +10,7 @@ use tokio::sync::OnceCell;
 use util::file::create_dir;
 
 use backtrace::Backtrace;
+use native_dialog::{MessageDialog, MessageType};
 use std::io::Write;
 
 mod cache;
@@ -40,6 +41,19 @@ fn log_crash(panic_info: Option<&std::panic::PanicInfo>, error: Option<tauri::Er
       }
     }
   }
+
+  let mut dialog_text = format!("Unrecoverable crash occurred!");
+  if cfg!(windows) {
+    dialog_text = format!("{dialog_text} Ensure you have not uninstalled WebView2: https://developer.microsoft.com/en-us/microsoft-edge/webview2/?form=MA13LH#download");
+  }
+  dialog_text = format!("{dialog_text}\n\nDetails:\n{log_contents}");
+
+  MessageDialog::new()
+    .set_type(MessageType::Error)
+    .set_title("OpenGOAL Launcher Crash Info")
+    .set_text(&dialog_text)
+    .show_alert()
+    .unwrap();
 }
 
 fn panic_hook(info: &std::panic::PanicInfo) {