Show a colour-coded team picker instead of cycling with T

T used to silently cycle Model.activeTeamID through the caller's teams with
no visible list of choices. It now opens a full picker (modelled on the
existing user picker) listing every team plus "All teams", each with a
stable identity colour from a new six-colour theme palette. The same colour
now also shows as a bullet next to "team: <name>" in the header, so the
active team stays visible without opening the picker.

Adds an Identity palette to the theme package (six hues, skipping the ones
that already mean firing/critical), Styles.TeamColor to pick one by team id,
and identity_1..6 as theme-file tokens alongside the existing twelve so a
fully custom theme can still set every token.

internal/theme/builtin.go

@@ -1,30 +1,36 @@
 package theme
 
-import "sort"
+import (
+	"sort"
+
+	"github.com/charmbracelet/lipgloss"
+)
 
 // The gruvbox palettes, in the author's original names. Dark uses the bright
 // variants and light the faded ones, which is what keeps each readable against
 // its own background.
 const (
-	darkBg0  = "#282828"
-	darkFg1  = "#ebdbb2"
-	darkGray = "#928374"
-	darkRed  = "#fb4934"
-	darkGrn  = "#b8bb26"
-	darkYel  = "#fabd2f"
-	darkBlu  = "#83a598"
-	darkAqua = "#8ec07c"
-	darkOrng = "#fe8019"
+	darkBg0    = "#282828"
+	darkFg1    = "#ebdbb2"
+	darkGray   = "#928374"
+	darkRed    = "#fb4934"
+	darkGrn    = "#b8bb26"
+	darkYel    = "#fabd2f"
+	darkBlu    = "#83a598"
+	darkAqua   = "#8ec07c"
+	darkOrng   = "#fe8019"
+	darkPurple = "#d3869b"
 
-	lightBg0  = "#fbf1c7"
-	lightFg1  = "#3c3836"
-	lightFg4  = "#7c6f64"
-	lightRed  = "#9d0006"
-	lightGrn  = "#79740e"
-	lightYel  = "#b57614"
-	lightBlu  = "#076678"
-	lightAqua = "#427b58"
-	lightOrng = "#af3a03"
+	lightBg0    = "#fbf1c7"
+	lightFg1    = "#3c3836"
+	lightFg4    = "#7c6f64"
+	lightRed    = "#9d0006"
+	lightGrn    = "#79740e"
+	lightYel    = "#b57614"
+	lightBlu    = "#076678"
+	lightAqua   = "#427b58"
+	lightOrng   = "#af3a03"
+	lightPurple = "#8f3f71"
 )
 
 // GruvboxDark is the default scheme. It assumes a dark terminal background:
@@ -46,6 +52,9 @@ var GruvboxDark = Theme{
 	SevError:    darkOrng,
 	SevWarning:  darkYel,
 	SevInfo:     darkAqua,
+
+	// Red already means an alarm, so it is the one gruvbox hue left out here.
+	Identity: [6]lipgloss.Color{darkBlu, darkAqua, darkYel, darkGrn, darkOrng, darkPurple},
 }
 
 // GruvboxLight is the same scheme against a light terminal background.
@@ -66,6 +75,8 @@ var GruvboxLight = Theme{
 	SevError:    lightOrng,
 	SevWarning:  lightYel,
 	SevInfo:     lightAqua,
+
+	Identity: [6]lipgloss.Color{lightBlu, lightAqua, lightYel, lightGrn, lightOrng, lightPurple},
 }
 
 // Default is the theme used when the config names none.

internal/theme/load.go

@@ -32,6 +32,13 @@ type rawTheme struct {
 	SevError    *string `yaml:"sev_error"`
 	SevWarning  *string `yaml:"sev_warning"`
 	SevInfo     *string `yaml:"sev_info"`
+
+	Identity1 *string `yaml:"identity_1"`
+	Identity2 *string `yaml:"identity_2"`
+	Identity3 *string `yaml:"identity_3"`
+	Identity4 *string `yaml:"identity_4"`
+	Identity5 *string `yaml:"identity_5"`
+	Identity6 *string `yaml:"identity_6"`
 }
 
 // binding ties a YAML key to its raw value and the field it fills, so parsing,
@@ -56,6 +63,12 @@ func bindings(r *rawTheme, t *Theme) []binding {
 		{"sev_error", r.SevError, &t.SevError},
 		{"sev_warning", r.SevWarning, &t.SevWarning},
 		{"sev_info", r.SevInfo, &t.SevInfo},
+		{"identity_1", r.Identity1, &t.Identity[0]},
+		{"identity_2", r.Identity2, &t.Identity[1]},
+		{"identity_3", r.Identity3, &t.Identity[2]},
+		{"identity_4", r.Identity4, &t.Identity[3]},
+		{"identity_5", r.Identity5, &t.Identity[4]},
+		{"identity_6", r.Identity6, &t.Identity[5]},
 	}
 }
 

internal/theme/load_test.go

@@ -106,6 +106,12 @@ sev_critical: "#000009"
 sev_error: "#00000a"
 sev_warning: "#00000b"
 sev_info: "#00000c"
+identity_1: "#00000d"
+identity_2: "#00000e"
+identity_3: "#00000f"
+identity_4: "#000010"
+identity_5: "#000011"
+identity_6: "#000012"
 `)
 
 	got, err := loadFrom(dir, "full")
@@ -115,6 +121,9 @@ sev_info: "#00000c"
 	if got.Primary != "#000001" || got.SevInfo != "#00000c" {
 		t.Errorf("tokens not applied: %+v", got)
 	}
+	if got.Identity[0] != "#00000d" || got.Identity[5] != "#000012" {
+		t.Errorf("identity tokens not applied: %+v", got.Identity)
+	}
 }
 
 func TestLoadFrom_Errors(t *testing.T) {

internal/theme/theme.go

@@ -29,4 +29,8 @@ type Theme struct {
 	SevError    lipgloss.Color
 	SevWarning  lipgloss.Color
 	SevInfo     lipgloss.Color
+
+	// Identity tells things like teams apart from one another — not a status
+	// or a severity, so none of the six carries a meaning of its own.
+	Identity [6]lipgloss.Color
 }