refactor: remove verified dead code across data, UI, and resources (#680)

* refactor: remove unused dead code across data, UI, and resources

* fix: resolve dangling references left by dead-code removal

Restore empty object Motion (braces required) and remove the 12 stale
test usages that still called the now-deleted production symbols:
- ServerStoreTest: removeServer/switchToServer tests
- ServerEndpointTest: isCleartext assertions
- ConnectViewModelTest: onHostChange/onPortChange tests + 3 dropped R.string refs
- SettingsViewModelTest: renameProfile tests + clearNavigateToLogin
- E2eIntegrationTest: previewSkill tests + onHostChange/onPortChange calls

Verified locally: compileDebugUnitTestKotlin + 48 tests pass.

* fix: remove unused imports flagged by ktlint

Drops 4 no-longer-referenced imports left by the dead-code removal:
- HermesApiService: SkillScanResponse (scanHubSkill removed)
- ServerEndpointTest: assertFalse, assertTrue (isCleartext assertions dropped)
- SettingsViewModelTest: assertFalse (rename tests removed)

---------

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/theme/Color.kt

@@ -77,21 +77,12 @@ val StatusGreyLight = Color(0xFFF5F5F5)
 
 // ── Chat-specific colours (always brand-defined for consistency) ───────
 
-val UserBubble = HermesPurple
-val UserBubbleDark = HermesPurpleDark
 val AssistantBubble = Color(0xFF1C1C26)
 val AssistantBubbleLight = Color(0xFFEDEAF4)
 val SystemMessageColor = Color(0xFF8B879A)
 val ToolChipColor = Color(0xFF262633)
 val ToolChipColorLight = Color(0xFFE6E3EE)
 
-// ── Skeleton shimmer colours ───────────────────────────────────────────
-
-val SkeletonBase = Color(0xFF1C1C26)
-val SkeletonHighlight = Color(0xFF2F2F3D)
-val SkeletonBaseLight = Color(0xFFE6E3EE)
-val SkeletonHighlightLight = Color(0xFFEFEDF4)
-
 // ── Syntax highlighting tokens (code blocks) ─────────────────────────────
 // VS Code Dark+ palette — good general readability across all presets.
 // These are consumed exclusively by CodeBlockCard (MessageCards.kt).

app/src/main/java/com/m57/hermescontrol/theme/Motion.kt

@@ -1,78 +1,13 @@
 package com.m57.hermescontrol.theme
 
-import androidx.compose.animation.core.CubicBezierEasing
-import androidx.compose.animation.core.Easing
-import androidx.compose.animation.core.FastOutSlowInEasing
-import androidx.compose.animation.core.Spring
-import androidx.compose.animation.core.SpringSpec
-import androidx.compose.animation.core.spring
 import androidx.compose.runtime.staticCompositionLocalOf
 
 /**
  * Motion tokens — duration, easing, and spring specs.
  *
- * Design intent (ui-ux-pro-max §7):
- *  - Micro-interactions: 150–300 ms
- *  - Complex transitions: ≤ 400 ms
- *  - Never exceed 500 ms
- *  - Enter: ease-out (decelerated), Exit: ease-in (accelerated)
- *  - Exit shorter than enter (~60–70 %)
- *  - Spring physics for interactive elements
- *  - All animations must be interruptible
- *
  * Access via `LocalMotion.current` in composables.
  */
-object Motion {
-    // ── Duration tokens (ms) ─────────────────────────────────────────
-
-    /** Instant — state changes with no perceptible delay. */
-    const val INSTANT = 0
-
-    /** Fast — micro-interactions, ripples, opacity toggles. */
-    const val FAST = 150
-
-    /** Normal — standard UI transitions, sheet slides, expansion. */
-    const val NORMAL = 250
-
-    /** Slow — complex multi-element transitions, screen navigation. */
-    const val SLOW = 400
-
-    // ── Easing curves ────────────────────────────────────────────────
-
-    /** Emphasized decelerate — for ENTERING elements (ease-out). */
-    val emphasizedDecelerate: Easing =
-        CubicBezierEasing(0.05f, 0.7f, 0.1f, 1.0f)
-
-    /** Emphasized accelerate — for EXITING elements (ease-in). */
-    val emphasizedAccelerate: Easing =
-        CubicBezierEasing(0.3f, 0.0f, 0.8f, 0.15f)
-
-    /** Standard — default M3 easing for neutral transitions. */
-    val standard: Easing = FastOutSlowInEasing
-
-    // ── Spring specs ─────────────────────────────────────────────────
-
-    /** Bouncy spring for interactive elements (press, release, drag). */
-    fun <T> bouncySpring(): SpringSpec<T> =
-        spring(
-            dampingRatio = Spring.DampingRatioMediumBouncy,
-            stiffness = Spring.StiffnessMedium,
-        )
-
-    /** Snappy spring for state toggles (switch, selection). */
-    fun <T> snappySpring(): SpringSpec<T> =
-        spring(
-            dampingRatio = Spring.DampingRatioNoBouncy,
-            stiffness = Spring.StiffnessHigh,
-        )
-
-    /** Gentle spring for layout animations (expand, collapse). */
-    fun <T> gentleSpring(): SpringSpec<T> =
-        spring(
-            dampingRatio = Spring.DampingRatioLowBouncy,
-            stiffness = Spring.StiffnessLow,
-        )
-}
+object Motion
 
 val MotionDefaults = Motion