feat(web): add web UI and Coolify compose deployment

`ghglance -serve :8080` runs a web UI from the same binary: submit a
username, a background job renders every card in every theme, and
/u/<user> shows them again with a theme picker and embed URLs.

- Cards are stored on disk with atomic symlink publishing and deleted
  after -retention (default 24h); -cooldown limits token-less regeneration.
- Token-less jobs use a public-only server token with private and org
  scope forced off; a submitter's own token is used for that job only and
  never stored or logged. The form links to GitHub's new-token page with
  the needed scopes pre-ticked.
- The CLI and web share one fetch helper; CLI output is unchanged.
- compose.yml deploys to Coolify with a data volume and /healthz check.

internal/github/model.go

@@ -22,14 +22,14 @@ type Profile struct {
 	RepoCount int
 
 	// Totals for the stats card.
-	TotalStars          int
-	TotalForks          int
-	TotalCommits        int // last year, from contributionsCollection
-	TotalCommitsAllTime int // sum across contributionYears
-	TotalPRs            int
-	TotalIssues         int
-	TotalReviews        int
-	TotalContributedTo  int
+	TotalStars                 int
+	TotalForks                 int
+	TotalCommits               int // last year, from contributionsCollection
+	TotalCommitsAllTime        int // sum across contributionYears
+	TotalPRs                   int
+	TotalIssues                int
+	TotalReviews               int
+	TotalContributedTo         int
 	TotalContributionsLastYear int // contributionCalendar.totalContributions + restrictedContributionsCount (last year)
 
 	// Count of owned repos grouped by primary language, sorted desc by Value.