feat(inbox): Enable conversation continuity for social channels (#11079)

## Summary
This PR enables and surfaces **conversation workflow** for social-style
channels that should support either:
- `Create new conversations` after resolve, or
- `Reopen same conversation`

## What is included
- Adds the conversation workflow setting UI as card-based options in
Inbox Settings.
- Expands channel availability in settings to include channels like:
  - Telegram
  - TikTok
  - Instagram
  - Line
  - WhatsApp
  - Facebook
- Updates conversation selection behavior for Line incoming messages to
respect the workflow (reopen vs create-new-after-resolved).
- Updates TikTok conversation selection behavior to respect the workflow
(reopen vs create-new-after-resolved).
- Keeps email behavior unchanged (always starts a new thread).

Fixes: https://github.com/chatwoot/chatwoot/issues/8426

## Screenshot

<img width="1400" height="900" alt="pr11079-workflow-sender-clear-tight"
src="https://github.com/user-attachments/assets/9456821f-8d83-4924-8dcf-7503c811a7b1"
/>


## How To Reproduce
1. Open `Settings -> Inboxes ->
<Telegram/TikTok/Instagram/Line/Facebook/WhatsApp inbox> -> Settings`.
2. Verify **Conversation workflow** is visible with the two card
options.
3. Toggle between both options and save.
4. For Line and TikTok, verify resolved-conversation behavior follows
the selected workflow.

## Testing
- `RAILS_ENV=test bundle exec rspec
spec/builders/messages/instagram/message_builder_spec.rb:213
spec/builders/messages/instagram/message_builder_spec.rb:255
spec/builders/messages/instagram/messenger/message_builder_spec.rb:228
spec/builders/messages/instagram/messenger/message_builder_spec.rb:293
spec/services/tiktok/message_service_spec.rb`
- Result: `16 examples, 0 failures`

## Follow-up
- Migrate Website Live Chat workflow settings into this same
conversation-workflow settings model.
- Add Voice channel support for this workflow setting.

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>

app/javascript/dashboard/components-next/AssignmentPolicy/components/RadioCard.vue

@@ -1,79 +0,0 @@
-<script setup>
-import Label from 'dashboard/components-next/label/Label.vue';
-
-const props = defineProps({
-  id: {
-    type: String,
-    required: true,
-  },
-  label: {
-    type: String,
-    required: true,
-  },
-  description: {
-    type: String,
-    required: true,
-  },
-  isActive: {
-    type: Boolean,
-    default: false,
-  },
-  disabled: {
-    type: Boolean,
-    default: false,
-  },
-  disabledLabel: {
-    type: String,
-    default: '',
-  },
-  disabledMessage: {
-    type: String,
-    default: '',
-  },
-});
-
-const emit = defineEmits(['select']);
-
-const handleChange = () => {
-  if (!props.isActive && !props.disabled) {
-    emit('select', props.id);
-  }
-};
-</script>
-
-<template>
-  <div
-    class="cursor-pointer rounded-xl outline outline-1 p-4 transition-all duration-200 bg-n-solid-1 py-4 ltr:pl-4 rtl:pr-4 ltr:pr-6 rtl:pl-6"
-    :class="[
-      disabled ? 'opacity-50 cursor-not-allowed' : 'cursor-pointer',
-      isActive ? 'outline-n-blue-9' : 'outline-n-weak',
-      !disabled && !isActive ? 'hover:outline-n-strong' : '',
-    ]"
-    @click="handleChange"
-  >
-    <div class="flex flex-col gap-2 items-start">
-      <div class="flex items-center justify-between w-full gap-3">
-        <div class="flex items-center gap-2">
-          <h3 class="text-heading-3 text-n-slate-12">
-            {{ label }}
-          </h3>
-          <Label v-if="disabled" :label="disabledLabel" color="amber" compact />
-        </div>
-        <input
-          :id="`${id}`"
-          :checked="isActive"
-          :value="id"
-          :name="id"
-          :disabled="disabled"
-          type="radio"
-          class="h-4 w-4 border-n-slate-6 text-n-brand focus:ring-n-brand focus:ring-offset-0 flex-shrink-0"
-          @change="handleChange"
-        />
-      </div>
-      <p class="text-body-main text-n-slate-11">
-        {{ disabled && disabledMessage ? disabledMessage : description }}
-      </p>
-      <slot />
-    </div>
-  </div>
-</template>

app/javascript/dashboard/components-next/AssignmentPolicy/components/story/RadioCard.story.vue

@@ -1,61 +0,0 @@
-<script setup>
-import { ref } from 'vue';
-import RadioCard from '../RadioCard.vue';
-
-const selectedOption = ref('round_robin');
-
-const handleSelect = value => {
-  selectedOption.value = value;
-  console.log('Selected:', value);
-};
-</script>
-
-<template>
-  <Story
-    title="Components/AgentManagementPolicy/RadioCard"
-    :layout="{ type: 'grid', width: '600px' }"
-  >
-    <Variant title="Basic Usage">
-      <div class="p-8 bg-n-background space-y-4">
-        <RadioCard
-          id="round_robin"
-          label="Round Robin"
-          description="Distributes conversations evenly among all available agents in a rotating manner"
-          :is-active="selectedOption === 'round_robin'"
-          @select="handleSelect"
-        />
-        <RadioCard
-          id="balanced"
-          label="Balanced Assignment"
-          description="Assigns conversations based on agent workload to maintain balance"
-          :is-active="selectedOption === 'balanced'"
-          @select="handleSelect"
-        />
-      </div>
-    </Variant>
-
-    <Variant title="Active State">
-      <div class="p-8 bg-n-background">
-        <RadioCard
-          id="active_option"
-          label="Active Option"
-          description="This option is currently selected and active"
-          is-active
-          @select="handleSelect"
-        />
-      </div>
-    </Variant>
-
-    <Variant title="Inactive State">
-      <div class="p-8 bg-n-background">
-        <RadioCard
-          id="inactive_option"
-          label="Inactive Option"
-          description="This option is not selected and can be clicked to activate"
-          is-active
-          @select="handleSelect"
-        />
-      </div>
-    </Variant>
-  </Story>
-</template>