fix(paths): accept literal tilde-digit filenames

Catalog generation and peer install/download validation rejected any path component containing a tilde followed by digits, even when the component was a valid long filename such as Bosons TD Gold~1.w3m. Remove the heuristic from all three validators and retain the existing device-name and portable-alias checks. Add a regression test for the literal filename so catalog publication and later path validation agree.

Test Plan:
- just clippy (passed)
- just test (passed)
- git diff --check (passed)

crates/lanspread-db/src/content_manifest/path.rs

@@ -184,9 +184,6 @@ fn validate_component(component: &str) -> eyre::Result<()> {
     if is_windows_device_name(device_stem) {
         eyre::bail!("catalog path uses a Windows device name: {component}");
     }
-    if looks_like_dos_short_name(component) {
-        eyre::bail!("catalog path resembles a Windows short-name alias: {component}");
-    }
     Ok(())
 }
 
@@ -206,16 +203,6 @@ fn is_windows_device_name(stem: &str) -> bool {
             })
 }
 
-fn looks_like_dos_short_name(component: &str) -> bool {
-    let stem = component.split('.').next().unwrap_or_default();
-    stem.rsplit_once('~').is_some_and(|(prefix, suffix)| {
-        !prefix.is_empty()
-            && !suffix.is_empty()
-            && suffix.len() <= 6
-            && suffix.bytes().all(|byte| byte.is_ascii_digit())
-    })
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -242,7 +229,6 @@ mod tests {
             "NUL.txt",
             "com1",
             "LPT¹.log",
-            "LOCAL~1/file",
             "Donne\u{301}es/file",
         ] {
             assert!(
@@ -252,6 +238,11 @@ mod tests {
         }
     }
 
+    #[test]
+    fn accepts_literal_tilde_digit_names() {
+        assert!(CanonicalCatalogPath::new("Bosons TD Gold~1.w3m").is_ok());
+    }
+
     #[test]
     fn aliases_are_conservative_across_platforms() {
         let left = CanonicalCatalogPath::new("Straße/FILE").expect("path should validate");

crates/lanspread-peer/src/download/manifest.rs

@@ -370,9 +370,6 @@ fn validate_component(component: &str) -> eyre::Result<()> {
     if is_windows_device_name(device_stem) {
         eyre::bail!("download path uses a Windows device name: {component}");
     }
-    if looks_like_dos_short_name(component) {
-        eyre::bail!("download path resembles a Windows short-name alias: {component}");
-    }
     Ok(())
 }
 
@@ -393,16 +390,6 @@ fn is_windows_device_name(stem: &str) -> bool {
             })
 }
 
-fn looks_like_dos_short_name(component: &str) -> bool {
-    let stem = component.split('.').next().unwrap_or_default();
-    stem.rsplit_once('~').is_some_and(|(prefix, suffix)| {
-        !prefix.is_empty()
-            && !suffix.is_empty()
-            && suffix.len() <= 6
-            && suffix.bytes().all(|byte| byte.is_ascii_digit())
-    })
-}
-
 fn validate_existing_destination(
     game_root: &Path,
     components: &[&str],

crates/lanspread-peer/src/install/mutation_root.rs

@@ -374,9 +374,6 @@ pub(super) fn validate_game_id(game_id: &str) -> eyre::Result<()> {
     if is_windows_device_name(device_stem) {
         eyre::bail!("game ID uses a Windows device name: {game_id}");
     }
-    if looks_like_dos_short_name(game_id) {
-        eyre::bail!("game ID resembles a Windows short-name alias: {game_id}");
-    }
     if is_download_protected_root_name(game_id) {
         eyre::bail!("game ID is reserved for application state: {game_id}");
     }
@@ -395,16 +392,6 @@ fn is_windows_device_name(stem: &str) -> bool {
             })
 }
 
-fn looks_like_dos_short_name(component: &str) -> bool {
-    let stem = component.split('.').next().unwrap_or_default();
-    stem.rsplit_once('~').is_some_and(|(prefix, suffix)| {
-        !prefix.is_empty()
-            && !suffix.is_empty()
-            && suffix.len() <= 6
-            && suffix.bytes().all(|byte| byte.is_ascii_digit())
-    })
-}
-
 fn open_ambient_directory_nofollow(path: &Path) -> eyre::Result<File> {
     let directory = fs::open_ambient(path, &directory_options(), ambient_authority())?;
     validate_directory_handle(&directory, &path.display().to_string())?;