Build on server instead of locally to fix ICU library mismatch

The binary was being built locally on Arch (with ICU 78) and then
deployed to Debian, causing shared library errors. Now the deployment
installs Bun on the server and builds the binary there, ensuring
compatibility with the target system's libraries.

ansible/deploy.yml

@@ -28,13 +28,54 @@
         owner: "{{ app_user }}"
         group: "{{ app_user }}"
 
-    - name: Copy binary to target location
-      copy:
-        src: ../target/sepiatones_xyz
-        dest: "{{ app_home }}/sepiatones_xyz"
+    - name: Install Bun
+      shell: curl -fsSL https://bun.sh/install | bash
+      args:
+        creates: /home/{{ app_user }}/.bun/bin/bun
+      become_user: "{{ app_user }}"
+
+    - name: Create source directory
+      file:
+        path: "{{ app_home }}/src"
+        state: directory
         owner: "{{ app_user }}"
         group: "{{ app_user }}"
-        mode: "0755"
+
+    - name: Copy package.json
+      copy:
+        src: ../package.json
+        dest: "{{ app_home }}/package.json"
+        owner: "{{ app_user }}"
+        group: "{{ app_user }}"
+
+    - name: Copy bun.lockb
+      copy:
+        src: ../bun.lockb
+        dest: "{{ app_home }}/bun.lockb"
+        owner: "{{ app_user }}"
+        group: "{{ app_user }}"
+
+    - name: Copy source files
+      synchronize:
+        src: ../src/
+        dest: "{{ app_home }}/src/"
+        recursive: yes
+        owner: no
+        group: no
+        archive: yes
+        delete: yes
+
+    - name: Install dependencies
+      shell: /home/{{ app_user }}/.bun/bin/bun install --frozen-lockfile
+      args:
+        chdir: "{{ app_home }}"
+      become_user: "{{ app_user }}"
+
+    - name: Build binary
+      shell: /home/{{ app_user }}/.bun/bin/bun build --compile --minify --target bun --outfile ./sepiatones_xyz ./src/index.tsx
+      args:
+        chdir: "{{ app_home }}"
+      become_user: "{{ app_user }}"
 
     - name: Copy data directory
       synchronize: