fix: address all review findings from PR #17

- Rename all remaining url locals to reqURL (consistency)
- Use http.MethodGet/http.MethodPost constants
- Document escapePath: relative paths only, double-encoding expected
- Add TestEscapePath with 7 edge cases (empty, spaces, #, deep, encoded)

gitea/client.go

@@ -56,8 +56,8 @@ type ChangedFile struct {
 
 // GetPullRequest fetches PR metadata.
 func (c *Client) GetPullRequest(ctx context.Context, owner, repo string, number int) (*PullRequest, error) {
-	url := fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d", c.baseURL, owner, repo, number)
-	body, err := c.doGet(ctx, url)
+	reqURL := fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d", c.baseURL, owner, repo, number)
+	body, err := c.doGet(ctx, reqURL)
 	if err != nil {
 		return nil, fmt.Errorf("fetch PR: %w", err)
 	}
@@ -70,8 +70,8 @@ func (c *Client) GetPullRequest(ctx context.Context, owner, repo string, number
 
 // GetPullRequestDiff fetches the unified diff for a PR.
 func (c *Client) GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error) {
-	url := fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d.diff", c.baseURL, owner, repo, number)
-	body, err := c.doGet(ctx, url)
+	reqURL := fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d.diff", c.baseURL, owner, repo, number)
+	body, err := c.doGet(ctx, reqURL)
 	if err != nil {
 		return "", fmt.Errorf("fetch diff: %w", err)
 	}
@@ -80,8 +80,8 @@ func (c *Client) GetPullRequestDiff(ctx context.Context, owner, repo string, num
 
 // GetPullRequestFiles fetches the list of files changed in a PR.
 func (c *Client) GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]ChangedFile, error) {
-	url := fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d/files", c.baseURL, owner, repo, number)
-	body, err := c.doGet(ctx, url)
+	reqURL := fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d/files", c.baseURL, owner, repo, number)
+	body, err := c.doGet(ctx, reqURL)
 	if err != nil {
 		return nil, fmt.Errorf("fetch PR files: %w", err)
 	}
@@ -94,8 +94,8 @@ func (c *Client) GetPullRequestFiles(ctx context.Context, owner, repo string, nu
 
 // GetCommitStatuses fetches CI statuses for a commit SHA.
 func (c *Client) GetCommitStatuses(ctx context.Context, owner, repo, sha string) ([]CommitStatus, error) {
-	url := fmt.Sprintf("%s/api/v1/repos/%s/%s/commits/%s/statuses", c.baseURL, owner, repo, sha)
-	body, err := c.doGet(ctx, url)
+	reqURL := fmt.Sprintf("%s/api/v1/repos/%s/%s/commits/%s/statuses", c.baseURL, owner, repo, sha)
+	body, err := c.doGet(ctx, reqURL)
 	if err != nil {
 		return nil, fmt.Errorf("fetch commit statuses: %w", err)
 	}
@@ -129,7 +129,7 @@ func (c *Client) GetFileContentRef(ctx context.Context, owner, repo, filepath, r
 // PostReview submits a review to a PR.
 // event should be "APPROVED" or "REQUEST_CHANGES".
 func (c *Client) PostReview(ctx context.Context, owner, repo string, number int, event, body string) error {
-	url := fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d/reviews", c.baseURL, owner, repo, number)
+	reqURL := fmt.Sprintf("%s/api/v1/repos/%s/%s/pulls/%d/reviews", c.baseURL, owner, repo, number)
 
 	payload := struct {
 		Body  string `json:"body"`
@@ -144,7 +144,7 @@ func (c *Client) PostReview(ctx context.Context, owner, repo string, number int,
 		return fmt.Errorf("marshal review payload: %w", err)
 	}
 
-	req, err := http.NewRequestWithContext(ctx, "POST", url, bytes.NewReader(data))
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, reqURL, bytes.NewReader(data))
 	if err != nil {
 		return fmt.Errorf("create review request: %w", err)
 	}
@@ -165,7 +165,7 @@ func (c *Client) PostReview(ctx context.Context, owner, repo string, number int,
 }
 
 func (c *Client) doGet(ctx context.Context, reqURL string) ([]byte, error) {
-	req, err := http.NewRequestWithContext(ctx, "GET", reqURL, nil)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, reqURL, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -184,8 +184,10 @@ func (c *Client) doGet(ctx context.Context, reqURL string) ([]byte, error) {
 	return io.ReadAll(resp.Body)
 }
 
-// escapePath escapes each segment of a file path for use in URLs.
+// escapePath escapes each segment of a relative file path for use in URLs.
 // Slashes are preserved as path separators; other special characters are escaped.
+// Input should be a relative path (no leading slash). Already-encoded segments
+// will be double-encoded, which is the desired behavior for user-provided paths.
 func escapePath(p string) string {
 	parts := strings.Split(p, "/")
 	for i, part := range parts {