Feat: full optimization on connector dashboard (#14979)

### What problem does this PR solve?

This PR improves the connector dashboard task management experience and
adds better visibility into connector execution logs.

### Overview:

#### Before
<img width="700" alt="image"
src="https://github.com/user-attachments/assets/e4a8ed6f-2e18-4f0f-8528-41a514550052"
/>

#### Now:
<img width="700" alt="Screenshot from 2026-05-18 16-31-30"
src="https://github.com/user-attachments/assets/d4ca193b-847a-49ae-9e4f-5fbca60ea627"
/>

### 1. Add a new logging page to the connector dashboard

A new logging page has been added so users can view connector task
execution logs directly from the connector dashboard.

### 2. Merge the Resume button into Confirm

The separate **Resume** button has been removed. The **Confirm** button
now represents different actions depending on the current task state:

- **Save**: Save form changes and reschedule tasks.
- **Stop**: Cancel currently scheduled or running tasks.
- **Resume**: Create new scheduled tasks after the previous tasks have
been stopped.
- **Start**: Start tasks when no task has been started yet.

### 3. Separate syncing and pruning tasks

Connector tasks are now separated into **syncing** and **pruning**.

Pruning is controlled by the **Sync deleted files** option:

- When **Sync deleted files** is disabled, only syncing tasks are shown.
- When **Sync deleted files** is enabled, both syncing and pruning tasks
are shown.

**Now: Sync deleted files disabled**

<img width="700" alt="Sync deleted files disabled"
src="https://github.com/user-attachments/assets/dbd9232e-614a-407f-a0b1-c109e5fa567d"
/>

**Now: Sync deleted files enabled**

<img width="700" alt="Sync deleted files enabled"
src="https://github.com/user-attachments/assets/1f527f48-ccb3-4ee8-97ca-086891489296"
/>

### 4. Update logs in backend

<img width="700" alt="image"
src="https://github.com/user-attachments/assets/10a95a3f-98c1-4e67-8afa-ddf6cda5b0b2"
/>

### 5. Remove connector resume API

- Removed: `POST /v1/connectors/<connector_id>/resume`
- Replaced by: `PATCH /v1/connectors/<connector_id>`


### Type of change

- [x] New Feature (non-breaking change which adds functionality)

api/apps/restful_apis/connector_api.py

@@ -53,17 +53,34 @@ async def update_connector(connector_id):
         return _connector_auth_error(connector_id, current_user.id)
 
     req = await get_request_json()
+    if isinstance(req, dict) and isinstance(req.get("data"), dict):
+        req = req["data"]
+
     e, conn = ConnectorService.get_by_id(connector_id)
     if not e:
         return get_data_error_result(message="Can't find this Connector!")
 
+    should_sleep = False
     if req:
-        conn = {fld: req[fld] for fld in ["prune_freq", "refresh_freq", "config", "timeout_secs"] if fld in req}
-        conn["id"] = connector_id
-        ConnectorService.update_by_id(connector_id, conn)
+        update_fields = {fld: req[fld] for fld in ["prune_freq", "refresh_freq", "config", "timeout_secs"] if fld in req}
+        if update_fields:
+            update_fields["id"] = connector_id
+            ConnectorService.update_by_id(connector_id, update_fields)
+            should_sleep = True
 
-    await asyncio.sleep(1)
+        if req.get("reschedule"):
+            ConnectorService.cancel_tasks(connector_id)
+            ConnectorService.schedule_tasks(connector_id)
+        elif req.get("status") in [TaskStatus.CANCEL, "CANCEL"]:
+            ConnectorService.cancel_tasks(connector_id)
+        elif req.get("status") in [TaskStatus.SCHEDULE, "SCHEDULE"]:
+            ConnectorService.schedule_tasks(connector_id)
+
+    if should_sleep:
+        await asyncio.sleep(1)
     e, conn = ConnectorService.get_by_id(connector_id)
+    if not e:
+        return get_data_error_result(message="Can't find this Connector!")
 
     return get_json_result(data=conn.to_dict())
 
@@ -83,9 +100,9 @@ async def create_connector():
             "input_type": InputType.POLL,
             "config": req["config"],
             "refresh_freq": int(req.get("refresh_freq", 5)),
-            "prune_freq": int(req.get("prune_freq", 720)),
+            "prune_freq": int(req.get("prune_freq", 5)),
             "timeout_secs": int(req.get("timeout_secs", 60 * 29)),
-            "status": TaskStatus.SCHEDULE,
+            "status": TaskStatus.UNSTART,
         }
         ConnectorService.save(**conn)
 
@@ -127,21 +144,6 @@ def list_logs(connector_id):
     return get_json_result(data={"total": total, "logs": arr})
 
 
-@manager.route("/connectors/<connector_id>/resume", methods=["POST"])  # noqa: F821
-@login_required
-async def resume(connector_id):
-    """Resume or cancel sync for an accessible connector."""
-    if not ConnectorService.accessible(connector_id, current_user.id):
-        return _connector_auth_error(connector_id, current_user.id)
-
-    req = await get_request_json()
-    if req.get("resume"):
-        ConnectorService.resume(connector_id, TaskStatus.SCHEDULE)
-    else:
-        ConnectorService.resume(connector_id, TaskStatus.CANCEL)
-    return get_json_result(data=True)
-
-
 @manager.route("/connectors/<connector_id>/rebuild", methods=["POST"])  # noqa: F821
 @login_required
 async def rebuild(connector_id):
@@ -166,7 +168,7 @@ def rm_connector(connector_id):
     if not ConnectorService.accessible(connector_id, current_user.id):
         return _connector_auth_error(connector_id, current_user.id)
 
-    ConnectorService.resume(connector_id, TaskStatus.CANCEL)
+    ConnectorService.cancel_tasks(connector_id)
     ConnectorService.delete_by_id(connector_id)
     return get_json_result(data=True)