fix: systematic byte fidelity for config strings and RV7 gaps

Resolves the 9 gap groups in docs/rewrite/notes/review-rv7-codex.md and
audits every string-typed config field against its consumers
(field -> consumers -> decode status table in final-Z9.md):
- Windows EnvMap keys use a port of Zig's nls.zig uppercase table
  (upcaseW); Windows locale init follows Zig's chain (setlocale +
  _putenv_s); malformed WTF-8 now fails process launch conversions like
  Zig instead of substituting U+FFFD; kitty file paths convert WTF-8.
- bash --rcfile/--init-file, configured TERM and inherited GTK LANG
  keep their original bytes.
- C API clipboard completion and ghostty_surface_binding_action take
  bytes; complete_clipboard_request is byte-typed through the core.
- text:/csi:/esc: bindings, enquiry-response, input = path:, embedded
  initial_input, search needles, titles, link regexes, clipboard
  codepoint map, command palette text and GTK font/namespace values
  decode the escape encoding before use.

Remaining by design: D-Bus a{ss} values and +new-window arguments are
UTF-8 by D-Bus type. C API key/preedit text follows separately.

Test Plan:
- cargo test --workspace
- just check-macos (both), just check-windows, just check-wasm

crates/ghostty-font/Cargo.toml

@@ -5,6 +5,7 @@ edition.workspace = true
 license.workspace = true
 
 [dependencies]
+ghostty-os.workspace = true
 tiny-skia = "0.12.0"
 png = "0.18.1"
 thiserror = "2.0.21"
@@ -33,9 +34,6 @@ harfbuzz-sys = "0.8.0"
 freetype-sys = { version = "0.23.0", features = ["bundled"] }
 harfbuzz-sys = { version = "0.8.0", features = ["bundled"] }
 
-[target.'cfg(target_arch = "wasm32")'.dependencies]
-ghostty-os.workspace = true
-
 # Apple targets use CoreText (`coretext` backend) by default; FreeType and
 # HarfBuzz are only linked for the `coretext-freetype` / `coretext-harfbuzz`
 # backends (see `build.rs` and the `[features]` table).

crates/ghostty-font/src/shared_grid_set.rs

@@ -501,7 +501,7 @@ impl Key {
         let mut descriptors: Vec<Descriptor> = Vec::new();
         for family in &config.font_family.list {
             descriptors.push(Descriptor {
-                family: Some(family.clone()),
+                family: Some(ghostty_os::osbytes::config_str_to_text(family)),
                 style: config.font_style.name_value().map(str::to_string),
                 size: font_size.points,
                 variations: config.font_variation.list.clone(),
@@ -520,7 +520,7 @@ impl Key {
         for family in &config.font_family_bold.list {
             let style = config.font_style_bold.name_value().map(str::to_string);
             descriptors.push(Descriptor {
-                family: Some(family.clone()),
+                family: Some(ghostty_os::osbytes::config_str_to_text(family)),
                 bold: style.is_none(),
                 style,
                 size: font_size.points,
@@ -531,7 +531,7 @@ impl Key {
         for family in &config.font_family_italic.list {
             let style = config.font_style_italic.name_value().map(str::to_string);
             descriptors.push(Descriptor {
-                family: Some(family.clone()),
+                family: Some(ghostty_os::osbytes::config_str_to_text(family)),
                 italic: style.is_none(),
                 style,
                 size: font_size.points,
@@ -545,7 +545,7 @@ impl Key {
                 .name_value()
                 .map(str::to_string);
             descriptors.push(Descriptor {
-                family: Some(family.clone()),
+                family: Some(ghostty_os::osbytes::config_str_to_text(family)),
                 bold: style.is_none(),
                 italic: style.is_none(),
                 style,