T02 typography: text styles, keys, formatters, fit, links, math, motion text

Headings to overlines, Code, Kbd and KbdCombo on gpui keystrokes,
Highlight, MiddleEllipsis and EllipsisTooltip, links, eight formatted
values on jiff with a typographic minus, CopyableText, SelectableText,
Emoji, a TeX subset, rolling AnimatedNumber, Typewriter, tonal
GradientText, ShimmerText. Gallery probes now hug their targets.
Codex gpt-6-astra (max): PASS in round 2.

Cargo.lock

@@ -1522,12 +1522,16 @@ dependencies = [
  "cocoa 0.26.0",
  "core-foundation 0.10.0",
  "core-graphics 0.24.0",
+ "emojis",
  "env_logger",
  "gpui",
  "image",
+ "jiff",
  "log",
+ "regex",
  "rust-embed",
  "smallvec",
+ "unicode-segmentation",
 ]
 
 [[package]]
@@ -1544,6 +1548,15 @@ dependencies = [
  "winreg",
 ]
 
+[[package]]
+name = "emojis"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b1514ced566c94991ed9563258ecf61e311fd773bf0a3f20606830386bf66e3"
+dependencies = [
+ "phf",
+]
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.42"
@@ -2956,10 +2969,12 @@ dependencies = [
  "defmt",
  "jiff-core",
  "jiff-static",
+ "jiff-tzdb-platform",
  "log",
  "portable-atomic",
  "portable-atomic-util",
  "serde_core",
+ "windows-link 0.2.1",
 ]
 
 [[package]]
@@ -2984,6 +2999,21 @@ dependencies = [
  "syn 2.0.119",
 ]
 
+[[package]]
+name = "jiff-tzdb"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "142bd39932ad231f10513df9ab62661fead8719872150b7ad02a2df79f4e141e"
+
+[[package]]
+name = "jiff-tzdb-platform"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "875a5a69ac2bab1a891711cf5eccbec1ce0341ea805560dcd90b7a2e925132e8"
+dependencies = [
+ "jiff-tzdb",
+]
+
 [[package]]
 name = "jobserver"
 version = "0.1.35"
@@ -3869,6 +3899,24 @@ version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
+[[package]]
+name = "phf"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1562dc717473dbaa4c1f85a36410e03c047b2e7df7f45ee938fbef64ae7fadf"
+dependencies = [
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e57fef6bc5981e38c2ce2d63bfa546861309f875b8a75f092d1d54ae2d64f266"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "pico-args"
 version = "0.5.0"