Implement persistent conversational AI chat

Cargo.lock

@@ -817,7 +817,7 @@ dependencies = [
  "liquid-core",
  "mlua",
  "pagefind",
- "pulldown-cmark",
+ "pulldown-cmark 0.13.3",
  "quick-xml 0.41.0",
  "rayon",
  "regex",
@@ -872,6 +872,7 @@ dependencies = [
  "objc2-app-kit 0.3.2",
  "objc2-foundation 0.3.2",
  "open",
+ "regex",
  "rfd",
  "serde_json",
  "syn 2.0.117",
@@ -3443,9 +3444,11 @@ dependencies = [
  "iced_runtime",
  "num-traits",
  "once_cell",
+ "pulldown-cmark 0.11.3",
  "rustc-hash 2.1.2",
  "thiserror 1.0.69",
  "unicode-segmentation",
+ "url",
 ]
 
 [[package]]
@@ -5870,6 +5873,19 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "pulldown-cmark"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "679341d22c78c6c649893cbd6c3278dcbe9fc4faa62fea3a9296ae2b50c14625"
+dependencies = [
+ "bitflags 2.11.0",
+ "getopts",
+ "memchr",
+ "pulldown-cmark-escape",
+ "unicase",
+]
+
 [[package]]
 name = "pulldown-cmark"
 version = "0.13.3"