fix: preserve {{ version }} in tool options during config load

e2e/backend/test_http

@@ -140,3 +140,15 @@ EOF
 mise uninstall --all && mise install
 mise env
 assert_contains "mise x -- hello-world" "hello world"
+
+# Test HTTP backend with Tera {{ version }} templating syntax (with spaces)
+# This tests the fix for https://github.com/jdx/mise/discussions/7748
+# Note: postinstall uses literal version since it's a shell command executed directly
+cat <<'EOF' >mise.toml
+[tools]
+"http:hello-tera" = { version = "1.0.0", url = "https://mise.jdx.dev/test-fixtures/hello-world-{{ version }}.tar.gz", bin_path = "hello-world-{{ version }}/bin", postinstall = "chmod +x $MISE_TOOL_INSTALL_PATH/hello-world-1.0.0/bin/hello-world" }
+EOF
+
+mise uninstall --all && mise install
+mise env
+assert_contains "mise x -- hello-world" "hello world"

src/config/config_file/mise_toml.rs

@@ -655,8 +655,12 @@ impl ConfigFile for MiseToml {
             for tool in &tvp.0 {
                 let version = self.parse_template_with_context(&context, &tool.tt.to_string())?;
                 let tvr = if let Some(mut options) = tool.options.clone() {
+                    // Add placeholder for version since it's not available at config load time
+                    // This preserves {{ version }} in the output for install-time rendering
+                    let mut opts_context = context.clone();
+                    opts_context.insert("version", "{{ version }}");
                     for v in options.opts.values_mut() {
-                        *v = self.parse_template_with_context(&context, v)?;
+                        *v = self.parse_template_with_context(&opts_context, v)?;
                     }
                     let mut ba = ba.clone();
                     // Start with cached options but filter out install-time-only options