feat: Overview heatmap improvements (#12359)

This PR adds inbox filtering to the conversation traffic heatmap,
allowing users to analyze patterns for specific inboxes. Additionally,
it also adds a new resolution count heatmap that shows when support
teams are most active in resolving conversations, using a green color to
distinguish it from the blue conversation heatmap.

The PR also reorganizes heatmap components into a cleaner structure with
a shared `BaseHeatmapContainer` that handles common functionality like
date range selection, inbox filtering, and data fetching. This makes it
easy to add new heatmap metrics in the future - just create a wrapper
component specifying the metric type and color scheme.

<img width="1926" height="1670" alt="CleanShot 2025-10-13 at 14 01
35@2x"
src="https://github.com/user-attachments/assets/67822a34-6170-4d19-9e11-7ad4ded5c388"
/>

<img width="1964" height="1634" alt="CleanShot 2025-10-13 at 14 03
00@2x"
src="https://github.com/user-attachments/assets/e4613c08-64b8-4fa6-91d8-7510946dd75d"
/>


Unrelated change, the data seeder conversation resolution would not work
correctly, we've fixed it.

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/dashboard/i18n/locale/en/report.json

@@ -51,6 +51,7 @@
     },
     "DATE_RANGE_OPTIONS": {
       "LAST_7_DAYS": "Last 7 days",
+      "LAST_14_DAYS": "Last 14 days",
       "LAST_30_DAYS": "Last 30 days",
       "LAST_3_MONTHS": "Last 3 months",
       "LAST_6_MONTHS": "Last 6 months",
@@ -266,6 +267,8 @@
     "NO_ENOUGH_DATA": "We've not received enough data points to generate report, Please try again later.",
     "DOWNLOAD_INBOX_REPORTS": "Download inbox reports",
     "FILTER_DROPDOWN_LABEL": "Select Inbox",
+    "ALL_INBOXES": "All Inboxes",
+    "SEARCH_INBOX": "Search Inbox",
     "METRICS": {
       "CONVERSATIONS": {
         "NAME": "Conversations",
@@ -467,6 +470,13 @@
       "CONVERSATIONS": "{count} conversations",
       "DOWNLOAD_REPORT": "Download report"
     },
+    "RESOLUTION_HEATMAP": {
+      "HEADER": "Resolutions",
+      "NO_CONVERSATIONS": "No conversations",
+      "CONVERSATION": "{count} conversation",
+      "CONVERSATIONS": "{count} conversations",
+      "DOWNLOAD_REPORT": "Download report"
+    },
     "AGENT_CONVERSATIONS": {
       "HEADER": "Conversations by agents",
       "LOADING_MESSAGE": "Loading agent metrics...",