feat: add nightly branch workflow

docs/reports/unused_code_audit.md

@@ -7,6 +7,7 @@
 ## Executive Summary
 
 This audit examined the Charon project for unused code elements using the following linting tools:
+
 1. **Go Vet** - Static analysis for Go code
 2. **Staticcheck** - Advanced Go linter
 3. **ESLint** - Frontend JavaScript/TypeScript linter
@@ -29,14 +30,17 @@ This audit examined the Charon project for unused code elements using the follow
 ### 1.1 Unused Variables
 
 #### File: `internal/services/certificate_service_test.go`
+
 - **Line:** 397
 - **Issue:** Value of `err` is never used
 - **Code Context:**
+
   ```go
   // Line 397
   err := someOperation()
   // err is assigned but never checked or used
   ```
+
 - **Severity:** Medium
 - **Recommendation:** Either check the error with proper error handling or use `_ = err` if intentionally ignoring
 - **Safe to Remove:** No - Needs review. Error should be handled or explicitly ignored.
@@ -59,13 +63,16 @@ The Go codebase is generally very clean with minimal unused code.
 ### 2.1 Unused Variables
 
 #### File: `frontend/src/components/CredentialManager.tsx`
+
 - **Line:** 370
 - **Variable:** `zone_filter`
 - **Code Context:**
+
   ```tsx
   const { zone_filter, ...rest } = prev
   return rest
   ```
+
 - **Severity:** Low
 - **Recommendation:** This is a destructuring assignment used to remove `zone_filter` from the object. This is intentional and follows the pattern of "destructuring to omit properties".
 - **Safe to Remove:** No - This is intentional code, not unused.
@@ -76,7 +83,7 @@ The Go codebase is generally very clean with minimal unused code.
 
 The frontend linter reported 56 warnings about using `any` type. These are **NOT** unused code issues but rather type safety warnings.
 
-#### Distribution by File:
+#### Distribution by File
 
 | File | Count | Lines |
 |------|-------|-------|
@@ -95,9 +102,10 @@ The frontend linter reported 56 warnings about using `any` type. These are **NOT
 
 **Total:** 56 instances
 
-#### Example Instances:
+#### Example Instances
 
 **File:** `src/components/CredentialManager.tsx`
+
 ```tsx
 // Line 71
 const handleChange = (field: string, value: any) => { // ⚠️ any type
@@ -116,6 +124,7 @@ catch (error: any) { // ⚠️ any type
 ```
 
 **File:** `src/components/DNSProviderForm.tsx`
+
 ```tsx
 // Line 67
 const handleCredentialChange = (field: string, value: any) => { // ⚠️ any type
@@ -138,25 +147,30 @@ const getFieldValue = (field: string): any => { // ⚠️ any type
 ## 3. Detailed Findings by Category
 
 ### 3.1 Unused Imports
+
 **Status:** ✅ None found
 
 No unused imports were detected in either backend or frontend code.
 
 ### 3.2 Unused Functions
+
 **Status:** ✅ None found
 
 No unused functions were detected in either backend or frontend code.
 
 ### 3.3 Unused Constants
+
 **Status:** ✅ None found
 
 No unused constants were detected in either backend or frontend code.
 
 ### 3.4 Unused Variables
+
 **Backend:** 1 issue (unused error value)
 **Frontend:** 1 false positive (intentional destructuring pattern)
 
 ### 3.5 Unused Type Parameters
+
 **Status:** ✅ None found
 
 ---
@@ -166,9 +180,11 @@ No unused constants were detected in either backend or frontend code.
 ### 4.1 Immediate Actions
 
 #### High Priority
+
 None
 
 #### Medium Priority
+
 1. **Fix Backend Error Handling** (`internal/services/certificate_service_test.go:397`)
    - Review the error assignment and add proper error handling
    - If intentionally ignoring, use `_ = err` with a comment explaining why
@@ -176,13 +192,16 @@ None
 ### 4.2 Code Quality Improvements
 
 #### Replace `any` Types (Low Priority)
+
 The 56 instances of `any` type should be replaced with proper TypeScript types:
+
 - **Test files:** Consider using `unknown` or specific mock types
 - **Error handlers:** Use `Error` or `unknown` type
 - **Event handlers:** Use proper React event types
 - **Generic handlers:** Create proper type definitions
 
 **Example Refactoring:**
+
 ```tsx
 // Before
 catch (error: any) {
@@ -200,7 +219,9 @@ catch (error: unknown) {
 ```
 
 #### False Positive Handling
+
 For the `zone_filter` variable in `CredentialManager.tsx:370`, add an ESLint disable comment if the warning is bothersome:
+
 ```tsx
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 const { zone_filter, ...rest } = prev
@@ -211,28 +232,36 @@ const { zone_filter, ...rest } = prev
 ## 5. Linting Tool Outputs
 
 ### 5.1 Go Vet Output
+
 ```
 Exit code: 0
 ```
+
 **Result:** No issues found
 
 ### 5.2 Staticcheck Output
+
 ```
 internal/services/certificate_service_test.go:397:3: this value of err is never used (SA4006)
 Exit code: 1
 ```
+
 **Result:** 1 issue found
 
 ### 5.3 Frontend ESLint Output
+
 ```
 ✖ 56 problems (0 errors, 56 warnings)
 ```
+
 **Result:** 56 type safety warnings (not unused code)
 
 ### 5.4 TypeScript Type Check Output
+
 ```
 Exit code: 0
 ```
+
 **Result:** No type errors
 
 ---
@@ -240,6 +269,7 @@ Exit code: 0
 ## 6. Code Coverage Context
 
 The project demonstrates excellent code hygiene with:
+
 - No unused imports
 - No unused functions
 - Minimal unused variables
@@ -253,18 +283,24 @@ The only actual unused code issue is a single unused error value in a test file,
 ## 7. Summary and Action Items
 
 ### Critical Issues
+
 **Count:** 0
 
 ### Important Issues
+
 **Count:** 1
+
 - [ ] Fix unused error value in `certificate_service_test.go:397`
 
 ### Suggested Improvements
+
 **Count:** 57
+
 - [ ] Replace `any` types with proper TypeScript types (56 instances)
 - [ ] Consider adding ESLint directive for intentional destructuring pattern (1 instance)
 
 ### Overall Assessment
+
 **Status:** ✅ Excellent
 
 The codebase is remarkably clean with minimal unused code. The only true unused code issue is a single error value in a test file. The majority of linting warnings are related to type safety (use of `any`), not unused code.
@@ -274,12 +310,14 @@ The codebase is remarkably clean with minimal unused code. The only true unused
 ## 8. Appendix: Tool Configuration
 
 ### Linting Tools Used
+
 1. **Go Vet** - `go vet ./...`
 2. **Staticcheck** - `staticcheck ./...`
 3. **ESLint** - `npm run lint`
 4. **TypeScript** - `npm run type-check`
 
 ### Excluded Patterns
+
 - `node_modules/`
 - `bower_components/`
 - Generated files