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");