refactor(office): generalize DataTable layout and document TUI table skill

Unify project/user flex column layout into layoutFlexTable with per-subject
policy in model. Add office-tui-table skill and AGENTS notes; fix CI go mod
tidy drift and test matrix Go version to match go.mod 1.25.

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/office/ui/table_projects.go

@@ -5,72 +5,6 @@ import (
 	"github.com/eslider/go-onlyoffice/cmd/office/model"
 )
 
-const (
-	projectMinTitleWidth = 12
-	projectMinFixedWidth = 3
-)
-
-// layoutProjectTable shows every project column; the title column absorbs leftover width.
-func layoutProjectTable(cols []model.TableColumn, totalW int) columnLayout {
-	indices := make([]int, len(cols))
-	for i := range cols {
-		indices[i] = i
-	}
-	widths := make(map[int]int, len(cols))
-
-	titleIdx := -1
-	fixed := 0
-	for i, col := range cols {
-		if col.Key == "title" {
-			titleIdx = i
-			continue
-		}
-		widths[i] = col.Width
-		fixed += widths[i]
-	}
-	if titleIdx < 0 {
-		return layoutScrollingTable(cols, 0, totalW)
-	}
-
-	titleW := totalW - fixed
-	if titleW < projectMinTitleWidth {
-		shrinkProjectFixedColumns(widths, indices, titleIdx, fixed+projectMinTitleWidth-totalW)
-		fixed = 0
-		for _, i := range indices {
-			if i != titleIdx {
-				fixed += widths[i]
-			}
-		}
-		titleW = totalW - fixed
-		if titleW < projectMinTitleWidth {
-			titleW = projectMinTitleWidth
-		}
-	}
-	widths[titleIdx] = titleW
-	normalizeWidthSum(widths, indices, totalW, titleIdx)
-	return columnLayout{indices: indices, widths: widths}
-}
-
-func shrinkProjectFixedColumns(widths map[int]int, indices []int, titleIdx, need int) {
-	for need > 0 {
-		changed := false
-		for _, i := range indices {
-			if i == titleIdx || widths[i] <= projectMinFixedWidth {
-				continue
-			}
-			widths[i]--
-			need--
-			changed = true
-			if need == 0 {
-				return
-			}
-		}
-		if !changed {
-			return
-		}
-	}
-}
-
 func (t *DataTable) projectBaseStyle(item model.Item) lipgloss.Style {
 	if model.ProjectIsOpen(item.Raw) {
 		return lipgloss.NewStyle().