feat: add room mentions and clickable room/relay refs

tests/content-text.test.ts

@@ -0,0 +1,47 @@
+import {describe, expect, it} from "vitest"
+import {parseContentTextParts} from "../src/lib/content-text"
+
+describe("parseContentTextParts", () => {
+  it("parses room references as relay_url'room_id", () => {
+    const parts = parseContentTextParts("Join wss://relay.example.com'general now")
+
+    expect(parts).toHaveLength(3)
+    expect(parts[0]).toEqual({type: "text", value: "Join "})
+    expect(parts[1]).toMatchObject({
+      type: "room",
+      value: "wss://relay.example.com'general",
+      h: "general",
+    })
+    expect(parts[2]).toEqual({type: "text", value: " now"})
+  })
+
+  it("parses relay urls as relay parts", () => {
+    const parts = parseContentTextParts("Try wss://relay.example.com")
+
+    expect(parts).toHaveLength(2)
+    expect(parts[0]).toEqual({type: "text", value: "Try "})
+    expect(parts[1]).toMatchObject({
+      type: "relay",
+      value: "wss://relay.example.com",
+    })
+  })
+
+  it("keeps trailing punctuation outside links", () => {
+    const parts = parseContentTextParts("See wss://relay.example.com'chat), thanks")
+
+    expect(parts).toHaveLength(3)
+    expect(parts[0]).toEqual({type: "text", value: "See "})
+    expect(parts[1]).toMatchObject({
+      type: "room",
+      value: "wss://relay.example.com'chat",
+      h: "chat",
+    })
+    expect(parts[2]).toEqual({type: "text", value: "), thanks"})
+  })
+
+  it("leaves non-relay urls as plain text", () => {
+    const parts = parseContentTextParts("https://example.com/path")
+
+    expect(parts).toEqual([{type: "text", value: "https://example.com/path"}])
+  })
+})