lint: fix code quality issues and improve type safety

Frontend improvements:
- Extract BucketType to shared types file for better organization
- Fix React key prop warnings with unique keys
- Fix async handler warnings with proper void wrapping
- Run Prettier formatting across all frontend files
- Organize imports and remove unused exports

Backend improvements:
- Fix whitespace formatting issues with dotnet format
- Address final newline requirements
- Build passes with only 1 nullable reference warning

Remaining linting issues are primarily in UI component library files
which should not be modified to maintain compatibility.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: hemanandr

ThingConnect.Pulse.Server/Controllers/StatusController.cs

@@ -144,4 +144,4 @@ public async Task<ActionResult<HistoryResponseDto>> GetEndpointHistoryAsync(
             return StatusCode(500, new { message = "Internal server error while retrieving endpoint history" });
         }
     }
-}
+}

ThingConnect.Pulse.Server/Controllers/TestMonitoringController.cs

@@ -160,4 +160,4 @@ public async Task<IActionResult> GetOutages()
 
         return Ok(new { Outages = outages, Count = outages.Count });
     }
-}
+}

ThingConnect.Pulse.Server/Controllers/TestRollupController.cs

@@ -56,4 +56,4 @@ public async Task<IActionResult> ProcessRollupDailyAsync()
             return StatusCode(500, new { message = "Error processing rollups", error = ex.Message });
         }
     }
-}
+}

ThingConnect.Pulse.Server/Infrastructure/PlainTextInputFormatter.cs

@@ -22,4 +22,4 @@ public override async Task<InputFormatterResult> ReadRequestBodyAsync(
         string content = await reader.ReadToEndAsync();
         return await InputFormatterResult.SuccessAsync(content);
     }
-}
+}

ThingConnect.Pulse.Server/Models/CheckResult.cs

@@ -61,4 +61,4 @@ public static CheckResult Failure(Guid endpointId, DateTimeOffset timestamp, str
             Error = error
         };
     }
-}
+}

ThingConnect.Pulse.Server/Models/ConfigDtos.cs

@@ -76,4 +76,4 @@ public sealed class TargetSection
     public string? Path { get; set; }
     public string? ExpectText { get; set; }
     public string? UserAgent { get; set; }
-}
+}

ThingConnect.Pulse.Server/Models/HistoryDtos.cs

@@ -39,4 +39,4 @@ public sealed class HistoryResponseDto
     public List<RollupBucketDto> Rollup15m { get; set; } = new();
     public List<DailyBucketDto> RollupDaily { get; set; } = new();
     public List<OutageDto> Outages { get; set; } = new();
-}
+}

ThingConnect.Pulse.Server/Models/StatusDtos.cs

@@ -50,4 +50,4 @@ public sealed class PagedLiveDto
 {
     public PageMetaDto Meta { get; set; } = default!;
     public List<LiveStatusItemDto> Items { get; set; } = new();
-}
+}

ThingConnect.Pulse.Server/Services/ConfigParser.cs

@@ -135,4 +135,4 @@ private static string GetDocsDirectory()
 
         return Path.Combine(Directory.GetCurrentDirectory(), "..", "docs");
     }
-}
+}

ThingConnect.Pulse.Server/Services/ConfigurationService.cs

@@ -236,4 +236,4 @@ private static string GenerateVersionId()
         return DateTimeOffset.UtcNow.ToString("yyyyMMddHHmmss") + "-" +
                Guid.NewGuid().ToString("N")[..8];
     }
-}
+}