feat: add bar element margins and space LSP indicators

docs/configuration.md

@@ -56,7 +56,7 @@ config.bind "leader s", config.core.diff.orientation.toggle
 
 ### Top and bottom bars
 
-`config.bar.top` and `config.bar.bottom` each accept ordered `left`, `center`, and `right` arrays of segment names. Both bars accept every builtin and custom segment, with the same anchors, title templates, padding, styled edges, and collision handling. Left and right groups anchor to their respective edges; the center group is centered on the whole row, not on the gap remaining between the other groups. Array order is display order within each group. Omitted groups and segment options retain that bar's defaults; an empty array removes that group.
+`config.bar.top` and `config.bar.bottom` each accept ordered `left`, `center`, and `right` arrays of segment names. Both bars accept every builtin and custom segment, with the same anchors, title templates, margins, padding, styled edges, and collision handling. Left and right groups anchor to their respective edges; the center group is centered on the whole row, not on the gap remaining between the other groups. Array order is display order within each group. Omitted groups and segment options retain that bar's defaults; an empty array removes that group.
 
 Use the two setters independently; a combined `config.bar = { ... }` assignment is not supported.
 
@@ -68,6 +68,7 @@ Vamp.configure do |config|
     left: [:mode, :path, :diagnostics, :selections, :count, :pending, :buffer],
     center: [], right: [:language, :lsp, :position],
     mode: { padding: 1, leading_edge: "", trailing_edge: "▓░" },
+    lsp: { margin: 1 },
     position: { padding: 1, leading_edge: "░▓", trailing_edge: "" }
   }
   config.bar.bottom = {
@@ -91,9 +92,11 @@ Each segment's `title` is a literal template supporting only `{index}`, `{view}`
 
 `:lsp` displays only ready servers assigned to the focused buffer, in configured stack order joined with ` + `. Disabled, initializing, failed, or unassigned servers do not appear. Names come from the initialization reply's `serverInfo.name`, falling back to the configured executable basename; no arbitrary named label can make an inactive server appear active.
 
+`margin` adds unstyled space outside both edges of a segment, unlike the styled internal `padding`. It accepts integers from `0` through `64`, defaults to `0`, and defaults to `1` for `:lsp` in either bar. For example, `config.bar.bottom = { lsp: { margin: 0 } }` removes LSP's external spacing without changing its padding. Margins count toward anchor placement and collision handling; empty segments consume no margin, and margins yield along with padding and edges when only clipped content fits.
+
 `padding` adds spaces inside the segment's styling, on both sides of its title, and accepts integers from `0` through `64` (default `1`). `leading_edge` and `trailing_edge` are separate styled glyph strings, not padding; `""` removes an edge. Tabs default to `"░▓"` / `"▓░"` edges; mode has only the trailing `"▓░"` edge, position and battery only the leading `"░▓"` edge, and other segments have none. `first_leading_edge` optionally overrides the first occurrence's leading glyphs: for tabs this is the actual first tab, not the first tab remaining after clipping; other segments have one occurrence. Tabs default this override to `""`, suppressing the first tab's left fade. Unicode widths are measured in terminal cells. Edge strings must be single-line and contain no control characters. Unknown style keys, invalid templates, and wrong types reject configuration.
 
-Any other segment name is a custom named value, such as `:build_status`. Set initial strings with `config.labels`; an empty value hides the custom segment, including its title override, padding, and edges. Names match `[A-Za-z_][A-Za-z0-9_]*`. Labels are plain text: control characters are replaced rather than interpreted as terminal escapes. The same named value can appear in either bar.
+Any other segment name is a custom named value, such as `:build_status`. Set initial strings with `config.labels`; an empty value hides the custom segment, including its title override, margins, padding, and edges. Names match `[A-Za-z_][A-Za-z0-9_]*`. Labels are plain text: control characters are replaced rather than interpreted as terminal escapes. The same named value can appear in either bar.
 
 `:battery` displays `bat N%` from the OS, with an immediate background reading and refreshes every 30 seconds. macOS uses IOKit, Linux uses system battery sysfs entries, and Windows uses `GetSystemPowerStatus`; no shell commands run. Missing, unsupported, or unreadable batteries hide the segment. macOS/Linux currently report the first present internal/system battery; Windows uses the OS's system percentage.