feat: Major WhatsApp integration update with Odoo and pause/resume

## Frontend
- Add media display (images, audio, video, docs) in Inbox
- Add pause/resume functionality for WhatsApp accounts
- Fix media URLs to use nginx proxy (relative URLs)

## API Gateway
- Add /accounts/:id/pause and /accounts/:id/resume endpoints
- Fix media URL handling for browser access

## WhatsApp Core
- Add pauseSession() - disconnect without logout
- Add resumeSession() - reconnect using saved credentials
- Add media download and storage for incoming messages
- Serve media files via /media/ static route

## Odoo Module (odoo_whatsapp_hub)
- Add Chat Hub interface with DOLLARS theme (dark, 3-column layout)
- Add WhatsApp/DRRR theme switcher for chat view
- Add "ABRIR CHAT" button in conversation form
- Add send_message_from_chat() method
- Add security/ir.model.access.csv
- Fix CSS scoping to avoid breaking Odoo UI
- Update webhook to handle message events properly

## Documentation
- Add docs/CONTEXTO_DESARROLLO.md with complete project context

## Infrastructure
- Add whatsapp_media Docker volume
- Configure nginx proxy for /media/ route
- Update .gitignore to track src/sessions/ source files

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

odoo_whatsapp_hub/views/dollars_action.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <!-- Client Action for Dollars Chat Interface -->
+    <record id="action_dollars_whatsapp_chat" model="ir.actions.client">
+        <field name="name">WhatsApp Chat</field>
+        <field name="tag">dollars_whatsapp_chat</field>
+        <field name="target">fullscreen</field>
+    </record>
+</odoo>

odoo_whatsapp_hub/views/whatsapp_conversation_views.xml

@@ -5,55 +5,46 @@
         <field name="name">whatsapp.conversation.tree</field>
         <field name="model">whatsapp.conversation</field>
         <field name="arch" type="xml">
-            <list decoration-bf="unread_count > 0">
+            <list>
                 <field name="display_name"/>
                 <field name="phone_number"/>
-                <field name="status" widget="badge" decoration-info="status == 'bot'" decoration-warning="status == 'waiting'" decoration-success="status == 'active'" decoration-muted="status == 'resolved'"/>
-                <field name="assigned_user_id" widget="many2one_avatar_user"/>
+                <field name="status"/>
                 <field name="last_message_at"/>
-                <field name="last_message_preview"/>
-                <field name="unread_count" widget="badge" decoration-danger="unread_count > 0"/>
             </list>
         </field>
     </record>
 
-    <!-- Form View -->
+    <!-- Form View - Simplified -->
     <record id="view_whatsapp_conversation_form" model="ir.ui.view">
         <field name="name">whatsapp.conversation.form</field>
         <field name="model">whatsapp.conversation</field>
         <field name="arch" type="xml">
             <form>
                 <header>
-                    <button name="action_assign_to_me" string="Asignarme" type="object" class="btn-primary" invisible="assigned_user_id"/>
-                    <button name="action_mark_resolved" string="Resolver" type="object" class="btn-secondary" invisible="status == 'resolved'"/>
-                    <field name="status" widget="statusbar" statusbar_visible="bot,waiting,active,resolved"/>
+                    <button name="action_open_chat" string="ABRIR CHAT" type="object" class="btn-primary"/>
+                    <button name="action_mark_resolved" string="Resolver" type="object"/>
+                    <field name="status" widget="statusbar"/>
                 </header>
                 <sheet>
                     <group>
                         <group>
-                            <field name="display_name" readonly="1"/>
+                            <field name="display_name"/>
                             <field name="phone_number"/>
-                            <field name="partner_id"/>
                         </group>
                         <group>
                             <field name="account_id"/>
-                            <field name="assigned_user_id"/>
                             <field name="last_message_at"/>
                         </group>
                     </group>
-                    <notebook>
-                        <page string="Mensajes" name="messages">
-                            <field name="message_ids" mode="list" readonly="1">
-                                <list>
-                                    <field name="create_date"/>
-                                    <field name="direction" widget="badge"/>
-                                    <field name="content"/>
-                                    <field name="status" widget="badge"/>
-                                    <field name="sent_by_id"/>
-                                </list>
-                            </field>
-                        </page>
-                    </notebook>
+                    <field name="message_ids">
+                        <list>
+                            <field name="create_date"/>
+                            <field name="direction"/>
+                            <field name="content"/>
+                            <field name="media_url" widget="url"/>
+                            <field name="status"/>
+                        </list>
+                    </field>
                 </sheet>
             </form>
         </field>
@@ -66,7 +57,6 @@
         <field name="arch" type="xml">
             <search>
                 <field name="phone_number"/>
-                <field name="partner_id"/>
             </search>
         </field>
     </record>

odoo_whatsapp_hub/views/whatsapp_menu.xml

@@ -8,10 +8,19 @@
         sequence="50"
     />
 
-    <!-- Conversations Menu -->
+    <!-- Chat Hub (Dollars Interface) -->
+    <menuitem
+        id="menu_whatsapp_chat_hub"
+        name="Chat Hub"
+        parent="menu_whatsapp_root"
+        action="action_dollars_whatsapp_chat"
+        sequence="5"
+    />
+
+    <!-- Conversations Menu (classic view) -->
     <menuitem
         id="menu_whatsapp_conversations"
-        name="Conversaciones"
+        name="Conversaciones (Lista)"
         parent="menu_whatsapp_root"
         action="action_whatsapp_conversation"
         sequence="10"