feat(chat): added chat interface and connection to ollama (#10)

Co-authored-by: Sharang Parnerkar <parnerkarsharang@gmail.com>
Reviewed-on: #10

src/components/chat_input_bar.rs

@@ -0,0 +1,69 @@
+use dioxus::prelude::*;
+
+/// Chat input bar with a textarea and send button.
+///
+/// Enter sends the message; Shift+Enter inserts a newline.
+/// The input is disabled during streaming.
+///
+/// # Arguments
+///
+/// * `input_text` - Two-way bound input text signal
+/// * `on_send` - Callback fired with the message text when sent
+/// * `is_streaming` - Whether to disable the input (streaming in progress)
+#[component]
+pub fn ChatInputBar(
+    input_text: Signal<String>,
+    on_send: EventHandler<String>,
+    is_streaming: bool,
+) -> Element {
+    let mut input = input_text;
+
+    rsx! {
+        div { class: "chat-input-bar",
+            textarea {
+                class: "chat-input",
+                placeholder: "Type a message...",
+                disabled: is_streaming,
+                rows: "1",
+                value: "{input}",
+                oninput: move |e: Event<FormData>| {
+                    input.set(e.value());
+                },
+                onkeypress: move |e: Event<KeyboardData>| {
+                    // Enter sends, Shift+Enter adds newline
+                    if e.key() == Key::Enter && !e.modifiers().shift() {
+                        e.prevent_default();
+                        let text = input.read().trim().to_string();
+                        if !text.is_empty() {
+                            on_send.call(text);
+                            input.set(String::new());
+                        }
+                    }
+                },
+            }
+            button {
+                class: "btn-primary chat-send-btn",
+                disabled: is_streaming || input.read().trim().is_empty(),
+                onclick: move |_| {
+                    let text = input.read().trim().to_string();
+                    if !text.is_empty() {
+                        on_send.call(text);
+                        input.set(String::new());
+                    }
+                },
+                if is_streaming {
+                    // Stop icon during streaming
+                    dioxus_free_icons::Icon {
+                        icon: dioxus_free_icons::icons::fa_solid_icons::FaStop,
+                        width: 16, height: 16,
+                    }
+                } else {
+                    dioxus_free_icons::Icon {
+                        icon: dioxus_free_icons::icons::fa_solid_icons::FaPaperPlane,
+                        width: 16, height: 16,
+                    }
+                }
+            }
+        }
+    }
+}