chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

web_src/js/markup/mermaid.test.ts

@@ -0,0 +1,59 @@
+import {sourceNeedsElk} from './mermaid.ts';
+import {dedent} from '../utils/testhelper.ts';
+
+test('MermaidConfigLayoutCheck', () => {
+  expect(sourceNeedsElk(dedent(`
+    flowchart TB
+      elk --> B
+  `))).toEqual(false);
+
+  expect(sourceNeedsElk(dedent(`
+    ---
+    config:
+      layout : elk
+    ---
+    flowchart TB
+      A --> B
+  `))).toEqual(true);
+
+  expect(sourceNeedsElk(dedent(`
+    ---
+    config:
+      layout: elk.layered
+    ---
+    flowchart TB
+      A --> B
+  `))).toEqual(true);
+
+  expect(sourceNeedsElk(`
+    %%{ init : { "flowchart": { "defaultRenderer": "elk" } } }%%
+    flowchart TB
+      A --> B
+  `)).toEqual(true);
+
+  expect(sourceNeedsElk(dedent(`
+    ---
+    config:
+      layout: 123
+    ---
+    %%{ init : { "class": { "defaultRenderer": "elk.any" } } }%%
+    flowchart TB
+      A --> B
+  `))).toEqual(true);
+
+  expect(sourceNeedsElk(`
+    %%{init:{
+        "layout" : "elk.layered"
+    }}%%
+    flowchart TB
+      A --> B
+  `)).toEqual(true);
+
+  expect(sourceNeedsElk(`
+    %%{ initialize: {
+        'layout' : 'elk.layered'
+    }}%%
+    flowchart TB
+      A --> B
+  `)).toEqual(true);
+});