Add service orchestration and web UI

internal/service/templates/static/footer/compose.gohtml

@@ -0,0 +1,41 @@
+{{ define "footer/compose" }}
+  <div class="compose">
+    <textarea
+      class="compose__textarea"
+      id="text-input"
+      placeholder="Type a message..."
+      aria-label="Message input"
+      rows="1"
+    ></textarea>
+    <div class="compose__attachments" id="attachments"></div>
+    <div class="compose__actions">
+      <button
+        type="button"
+        class="compose__action-btn"
+        id="attach"
+        aria-label="Attach files"
+      >
+        <svg class="icon"><use href="/static/icons.svg#attach"></use></svg>
+      </button>
+      <input type="file" id="file-input" multiple hidden />
+      <div class="compose__actions-right">
+        <button
+          type="button"
+          class="compose__action-btn compose__action-btn--record"
+          id="ptt"
+          aria-label="Push to talk"
+        >
+          <svg class="icon"><use href="/static/icons.svg#mic"></use></svg>
+        </button>
+        <button
+          type="button"
+          class="compose__action-btn compose__action-btn--send"
+          id="send"
+          aria-label="Send message"
+        >
+          <svg class="icon"><use href="/static/icons.svg#send"></use></svg>
+        </button>
+      </div>
+    </div>
+  </div>
+{{ end }}