fix: remove Windows app data on uninstall

Author: tyql688

src-tauri/tauri.conf.json

@@ -50,6 +50,11 @@
       "icons/icon.ico",
       "icons/icon.png"
     ],
+    "windows": {
+      "nsis": {
+        "installerHooks": "windows/nsis-hooks.nsh"
+      }
+    },
     "macOS": {
       "entitlements": "Entitlements.plist"
     }

src-tauri/tests/nsis_uninstall.rs

@@ -0,0 +1,33 @@
+use std::{fs, path::Path};
+
+#[test]
+fn nsis_hook_deletes_sessionview_data_only_when_requested() {
+    let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
+    let config_path = manifest_dir.join("tauri.conf.json");
+    let config: serde_json::Value =
+        serde_json::from_str(&fs::read_to_string(&config_path).expect("read tauri.conf.json"))
+            .expect("parse tauri.conf.json");
+
+    let hook_relative = config
+        .pointer("/bundle/windows/nsis/installerHooks")
+        .and_then(serde_json::Value::as_str)
+        .expect("NSIS installer hook must be configured");
+    let hook = fs::read_to_string(manifest_dir.join(hook_relative)).expect("read NSIS hook");
+    let commands: Vec<&str> = hook
+        .lines()
+        .map(str::trim)
+        .filter(|line| !line.is_empty() && !line.starts_with(';'))
+        .collect();
+
+    assert_eq!(
+        commands,
+        [
+            "!macro NSIS_HOOK_POSTUNINSTALL",
+            "${If} $DeleteAppDataCheckboxState = 1",
+            "${AndIf} $UpdateMode <> 1",
+            "RMDir /r \"$LOCALAPPDATA\\sessionview\"",
+            "${EndIf}",
+            "!macroend",
+        ]
+    );
+}

src-tauri/windows/nsis-hooks.nsh

@@ -0,0 +1,10 @@
+; SessionView stores its database and image cache in
+; %LOCALAPPDATA%\sessionview instead of Tauri's bundle-identifier directory.
+; Match Tauri's built-in "Delete application data" behavior for that legacy
+; location without deleting data during updates or unconfirmed uninstalls.
+!macro NSIS_HOOK_POSTUNINSTALL
+  ${If} $DeleteAppDataCheckboxState = 1
+  ${AndIf} $UpdateMode <> 1
+    RMDir /r "$LOCALAPPDATA\sessionview"
+  ${EndIf}
+!macroend