feat(theme): update Hanmac Green and Brown palette steps

Seven shared Hanmac color tokens change:
- Green Default #123328 -> #164434, Dark 1 #0a221d -> #11372d,
  Dark 2 #071e18 -> #0b2b23, Dark 3 #020a07 -> #030e0a
- Brown Default #3e3523 -> #4e422d, Dark 1 #352d1d -> #403726,
  Dark 3 #1d1810 -> #0d0b07

Updates primitives.css, the generated default values, themes/default.json,
the verification baseline and the hard-coded Default expectations in the
theme Stories and the quality-reference script. --hm-sem-on-accent is
intentionally unchanged. check:theme-defaults reports generated outputs match.

src/theme/designer-theme.stories.tsx

@@ -240,7 +240,7 @@ export const LiveVerification: Story = {
       }
       fillJson('{"schemaVersion":1,"tokens":{"color.state.active":"#345678"}}'); click("Import JSON")
       await waitForThemeState(() => variable("--hm-sem-state-active") === "#345678", "Designer partial import")
-      assert(variable("--hm-sem-state-active") === "#345678" && variable("--hm-sem-action-primary") === "#123328" && variable("--hm-sem-stroke-input-focus") === "#266651", "Partial import replaces previous keys; unspecified roles use Default")
+      assert(variable("--hm-sem-state-active") === "#345678" && variable("--hm-sem-action-primary") === "#164434" && variable("--hm-sem-stroke-input-focus") === "#266651", "Partial import replaces previous keys; unspecified roles use Default")
       for (const [index, [token, label]] of roles.entries()) {
         const value = `#3456${(120 + index).toString(16)}`
         setInput(`${label} HEX`, value)

src/theme/runtime-loader.stories.tsx

@@ -50,7 +50,7 @@ async function verifyLoader(container: HTMLElement) {
     assert(checked.dataset.state === "checked" && checked.getAttribute("aria-checked") === "true" && getComputedStyle(checked).backgroundColor === "rgb(0, 127, 115)", "HTTP JSON reaches rendered Checkbox")
     assert(JSON.stringify(geometry()) === initial, "External JSON preserves component geometry")
     const resolved = resolveRuntimeTheme({ schemaVersion: 1, tokens: { "color.state.active": "#345678" } }, defaults)
-    assert(resolved.tokens["color.action.primary"] === "#123328" && resolved.tokens["color.state.active"] === "#345678", "Default JSON + partial service override merge")
+    assert(resolved.tokens["color.action.primary"] === "#164434" && resolved.tokens["color.state.active"] === "#345678", "Default JSON + partial service override merge")
     assert(await loadRuntimeTheme(root, "/themes/service-example.json", { defaults }), "Loader accepts separately fetched Default JSON")
     assert(variable("--hm-sem-action-primary") === "#6837a8", "Service override wins supplied Default")
     resetRuntimeTheme(root)

src/theme/runtime-theme.stories.tsx

@@ -190,7 +190,7 @@ async function verifyRuntime(canvasElement: HTMLElement, keyboardFocus = false)
         applyRuntimeTheme(after, {schemaVersion:1,tokens:{"color.state.active":"#345678"}})
         assert(variable("--hm-checkbox-checked-background") === "#345678", "Scoped B overrides global A")
         assert(getComputedStyle(globalRoot).getPropertyValue("--hm-checkbox-checked-background").trim() === "#007f73", "Global A retains its own mapping")
-        assert(variable("--hm-badge-default-background") === "#123328", "Explicit isolated scope falls back to HM preset")
+        assert(variable("--hm-badge-default-background") === "#164434", "Explicit isolated scope falls back to HM preset")
       } finally { resetRuntimeTheme(globalRoot); resetRuntimeTheme(after) }
       after.style.setProperty("--hm-sem-state-active", "#112233", "important")
       applyRuntimeTheme(after, external); resetRuntimeTheme(after)

src/theme/verification-baseline.json

@@ -779,13 +779,13 @@
   "--hm-green-light-3": "#249473",
   "--hm-green-light-2": "#266651",
   "--hm-green-light-1": "#205241",
-  "--hm-green-default": "#123328",
-  "--hm-green-dark-1": "#0a221d",
-  "--hm-green-dark-2": "#071e18",
+  "--hm-green-default": "#164434",
+  "--hm-green-dark-1": "#11372d",
+  "--hm-green-dark-2": "#0b2b23",
   "--hm-brown-light-2": "#897445",
   "--hm-brown-light-1": "#604f32",
-  "--hm-brown-default": "#3e3523",
-  "--hm-brown-dark-1": "#352d1d",
+  "--hm-brown-default": "#4e422d",
+  "--hm-brown-dark-1": "#403726",
   "--hm-brown-light-4": "#ecd4a2",
   "--hm-orange-light-4": "#feba88",
   "--hm-orange-default": "#cc5200",