refactor: rename canonical filter to canonicalize_url for better clarity

- Rename filter from 'canonical' to 'canonicalize_url' to follow Pongo2
naming conventions
- Update function name from filterCanonical to filterCanonicalizeURL
- Update template usage in post.html and profile.html
- Update test function name and all references

bskyweb/cmd/bskyweb/filters.go

@@ -7,10 +7,10 @@ import (
 )
 
 func init() {
-	pongo2.RegisterFilter("canonical", filterCanonical)
+	pongo2.RegisterFilter("canonicalize_url", filterCanonicalizeURL)
 }
 
-func filterCanonical(in *pongo2.Value, param *pongo2.Value) (*pongo2.Value, *pongo2.Error) {
+func filterCanonicalizeURL(in *pongo2.Value, param *pongo2.Value) (*pongo2.Value, *pongo2.Error) {
 	urlStr := in.String()
 
 	parsedURL, err := url.Parse(urlStr)

bskyweb/cmd/bskyweb/filters_test.go

@@ -6,7 +6,7 @@ import (
 	"github.com/flosch/pongo2/v6"
 )
 
-func TestCanonicalFilter(t *testing.T) {
+func TestCanonicalizeURLFilter(t *testing.T) {
 	tests := []struct {
 		name     string
 		input    string
@@ -47,14 +47,14 @@ func TestCanonicalFilter(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			inputValue := pongo2.AsValue(tt.input)
-			result, err := filterCanonical(inputValue, nil)
+			result, err := filterCanonicalizeURL(inputValue, nil)
 			if err != nil {
-				t.Errorf("filterCanonical() error = %v", err)
+				t.Errorf("filterCanonicalizeURL() error = %v", err)
 				return
 			}
 
 			if result.String() != tt.expected {
-				t.Errorf("filterCanonical() = %v, want %v", result.String(), tt.expected)
+				t.Errorf("filterCanonicalizeURL() = %v, want %v", result.String(), tt.expected)
 			}
 		})
 	}

bskyweb/templates/post.html

@@ -14,7 +14,7 @@
   <meta property="profile:username" content="{{ profileView.Handle }}">
   {%- if requestURI %}
   <meta property="og:url" content="{{ requestURI }}">
-  <link rel="canonical" href="{{ requestURI|canonical }}" />
+  <link rel="canonical" href="{{ requestURI|canonicalize_url }}" />
   {% endif -%}
   {%- if postView.Author.DisplayName %}
   <meta property="og:title" content="{{ postView.Author.DisplayName }} (@{{ postView.Author.Handle }})">

bskyweb/templates/profile.html

@@ -15,7 +15,7 @@
   <meta property="profile:username" content="{{ profileView.Handle }}">
   {%- if requestURI %}
   <meta property="og:url" content="{{ requestURI }}">
-  <link rel="canonical" href="{{ requestURI|canonical }}" />
+  <link rel="canonical" href="{{ requestURI|canonicalize_url }}" />
   {% endif -%}
   {%- if profileView.DisplayName %}
   <meta property="og:title" content="{{ profileView.DisplayName }} (@{{ profileView.Handle }})">