Shub/let listener mode control (#9584)

* feat: add two-way mode control for listener connections

Enable bidirectional permission mode control between letta-cloud UI and letta-code instances.

**Backend:**
- Added ModeChangeMessage and ModeChangedMessage to WebSocket protocol
- Added sendModeChange endpoint (/v1/listeners/:connectionId/mode)
- listenersRouter publishes mode_change via Redis Pub/Sub
- listenersHandler handles mode_changed acknowledgments from letta-code
- Stores current mode in Redis for UI state sync

**Contract:**
- Added sendModeChange contract with PermissionModeSchema
- 4 modes: default, acceptEdits, plan, bypassPermissions

**Frontend:**
- Extended PermissionMode type to 4 modes (was 2: ask/never)
- PermissionModeSelector now shows all 4 modes with descriptions
- Added disabled prop (grayed out when Cloud orchestrator selected)
- PermissionModeContext.sendModeChangeToDevice() calls API
- AgentMessenger sends mode changes to device on mode/device change
- Updated auto-approval logic (only in Cloud mode, only for bypassPermissions)
- Updated inputMode logic (device handles approvals, not cloud)

**Translations:**
- Updated en.json with 4 mode labels and descriptions
- Removed legacy "askAlways" and "neverAsk" keys

**Mode Behavior:**
- default: Ask permission for each tool
- acceptEdits: Auto-approve file edits only
- plan: Read-only exploration (denies writes)
- bypassPermissions: Auto-approve everything

**Lint Fixes:**
- Removed unused imports and functions from trackingMiddleware.ts

🐾 Generated with [Letta Code](https://letta.com)

Co-Authored-By: Letta <noreply@letta.com>

* fix: store mode in connectionData and show approvals for all modes

**Backend:**
- Fixed Redis WRONGTYPE error - store currentMode inside connectionData object
- Changed const connectionData to let connectionData (needs mutation)
- Updated mode_changed handler to reassign entire connectionData object
- Updated ping handler for consistency (also reassigns connectionData)
- Added currentMode field to ListenerConnectionSchema (optional)

**Frontend:**
- Simplified inputMode logic - always show approval UI when toolCallsToApprove.length > 0
- Removed mode-specific approval filtering (show approvals even in bypass/acceptEdits for visibility)
- Users can see what tools are being auto-approved during execution

**Why:**
- Redis key is a JSON string (via setRedisData), not a hash
- Cannot use hset on string keys - causes WRONGTYPE error
- Must update entire object via setRedisData like ping handler does
- Approval visibility helpful for debugging/understanding agent behavior

🐾 Generated with [Letta Code](https://letta.com)

Co-Authored-By: Letta <noreply@letta.com>

* fix: use useMutation hook for sendModeChange instead of direct call

cloudAPI is initialized via initTsrReactQuery, so sendModeChange is a
mutation hook object, not a callable function. Use .useMutation() at the
component level and mutateAsync in the callback.

Co-authored-by: Shubham Naik <4shub@users.noreply.github.com>

* chore: update logs

---------

Co-authored-by: Letta <noreply@letta.com>
Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com>
Co-authored-by: Shubham Naik <4shub@users.noreply.github.com>

fern/openapi.json

@@ -25983,6 +25983,15 @@
                           },
                           "lastHeartbeat": {
                             "type": "number"
+                          },
+                          "currentMode": {
+                            "type": "string",
+                            "enum": [
+                              "default",
+                              "acceptEdits",
+                              "plan",
+                              "bypassPermissions"
+                            ]
                           }
                         },
                         "required": [
@@ -26245,6 +26254,86 @@
           }
         }
       }
+    },
+    "/v1/listeners/{connectionId}/mode": {
+      "post": {
+        "description": "Change the permission mode of a specific listener connection",
+        "summary": "Change Listener Mode",
+        "tags": ["listeners"],
+        "parameters": [
+          {
+            "name": "connectionId",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "operationId": "listeners.sendModeChange",
+        "requestBody": {
+          "description": "Body",
+          "content": {
+            "application/json": {
+              "schema": {
+                "type": "object",
+                "properties": {
+                  "mode": {
+                    "type": "string",
+                    "enum": [
+                      "default",
+                      "acceptEdits",
+                      "plan",
+                      "bypassPermissions"
+                    ]
+                  }
+                },
+                "required": ["mode"]
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "200",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "object",
+                  "properties": {
+                    "success": {
+                      "type": "boolean"
+                    },
+                    "message": {
+                      "type": "string"
+                    }
+                  },
+                  "required": ["success", "message"]
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "404",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "object",
+                  "properties": {
+                    "errorCode": {
+                      "type": "string"
+                    },
+                    "message": {
+                      "type": "string"
+                    }
+                  },
+                  "required": ["errorCode", "message"]
+                }
+              }
+            }
+          }
+        }
+      }
     }
   },
   "components": {