Syntax highlighting: .coffee URL for CoffeeScript, extension only when relevance >= 5

- Map coffee extension to hljs language 'coffeescript' so URLs use .coffee not .coffeescript
- Add minRelevanceForExtension (5); only append extension to URL when auto-detect is confident
- Avoids misleading extensions for logs/plain text misclassified by highlightAuto

Made-with: Cursor

static/application.js

@@ -69,10 +69,12 @@ haste_document.prototype.save = function(data, callback) {
       _this.locked = true;
       _this.key = res.key;
       var high = hljs.highlightAuto(data);
+      var relevance = high.relevance != null ? high.relevance : high.re;
       callback(null, {
         value: high.value,
         key: res.key,
         language: high.language,
+        relevance: relevance,
         lineCount: data.split('\n').length
       });
     },
@@ -160,6 +162,10 @@ haste.prototype.newDocument = function(hideHistory) {
   this.removeLineNumbers();
 };
 
+// Only add a URL extension when auto-detect relevance is at least this (avoids
+// misleading extensions for log files / plain text that get misclassified)
+haste.minRelevanceForExtension = 5;
+
 // Map of common extensions
 // Note: this list does not need to include anything that IS its extension,
 // due to the behavior of lookupTypeByExtension and lookupExtensionByType
@@ -170,7 +176,7 @@ haste.extensionMap = {
   lua: 'lua', pas: 'delphi', java: 'java', cpp: 'cpp', cc: 'cpp', m: 'objectivec',
   vala: 'vala', sql: 'sql', sm: 'smalltalk', lisp: 'lisp', ini: 'ini',
   diff: 'diff', bash: 'bash', sh: 'bash', tex: 'tex', erl: 'erlang', hs: 'haskell',
-  md: 'markdown', txt: '', coffee: 'coffee', json: 'javascript',
+  md: 'markdown', txt: '', coffee: 'coffeescript', json: 'javascript',
   swift: 'swift'
 };
 
@@ -246,7 +252,8 @@ haste.prototype.lockDocument = function() {
       _this.$code.html(ret.value);
       _this.setTitle(ret.key);
       var file = '/' + ret.key;
-      if (ret.language) {
+      var relevance = ret.relevance != null ? ret.relevance : 0;
+      if (ret.language && relevance >= haste.minRelevanceForExtension) {
         file += '.' + _this.lookupExtensionByType(ret.language);
       }
       window.history.pushState(null, _this.appName + '-' + ret.key, file);