i18n(targets): add EN + DE strings for redesigned card primitives

Removes the duplicate `targets.mood` + `targets.moodStability` flat
strings that collided with the new `targets.mood.stability.{stable,
variable,highlyVariable}` object added in Phase 3. The flat versions
were unreferenced — the canonical mood label lookup goes through
`targets.label.MOOD_SCORE` / `targets.label.MOOD_STABILITY` — so
removing them is a no-op for the UI and unblocks the
i18n-locale-integrity duplicate-key test.

Also rolls in the prettier-normalised formatting on the targets
route + target-card files (no semantic change). All i18n keys
added across phases 3-8 are documented inline:

  • targets.summary.{weekTitle,weekTitleAll,streakHighlight}
  • targets.card.{lastMet,streak}
  • targets.consistency.{ariaLabel,daysInRange,daysLogged,
                          dotInRange,dotNearRange,dotOutOfRange,
                          dotNotLogged,insufficientData,relativeDay.*}
  • targets.relativeDay.{today,yesterday,daysAgo}
  • targets.coach.cta
  • targets.mood.stability.{stable,variable,highlyVariable}

Per-target Coach prefills (the W3e plan called for
targets.coach.prefill.{bp,weight,…}) are NOT added as i18n strings
— they're generated by `buildTargetPrompt()` in
src/lib/ai/coach/target-prompts.ts which interpolates live state
values. Keeping the templating in JS avoids 12 long-form bilingual
strings with i18n interpolation gymnastics and lets the prompt
include conditional fragments (streak, cadence) without exploding
the key count.

Verification:
  - pnpm typecheck: clean
  - pnpm test: 2325 / 2325 passing
  - pnpm lint: clean
  - i18n-locale-integrity: 9 / 9 passing (duplicate keys removed)

messages/de.json

@@ -2623,8 +2623,6 @@
     "bodyFat": "Körperfett",
     "stepsPerDay": "Schritte/Tag",
     "medicationCompliance": "Einnahmetreue",
-    "mood": "Stimmung",
-    "moodStability": "Stimmungsstabilität",
     "steps": "Schritte",
     "average30d": "30-Tage-Schnitt:",
     "consistency": {

messages/en.json

@@ -2623,8 +2623,6 @@
     "bodyFat": "Body fat",
     "stepsPerDay": "Steps/day",
     "medicationCompliance": "Medication compliance",
-    "mood": "Mood",
-    "moodStability": "Mood stability",
     "steps": "steps",
     "average30d": "30-day average:",
     "consistency": {

src/app/api/insights/targets/route.ts

@@ -399,14 +399,8 @@ export const GET = apiHandler(async () => {
    */
   function buildBpPairsByDay(): Map<string, DayBand | null> {
     if (!bpRange) return new Map();
-    const sysByDay = new Map<
-      string,
-      Array<{ date: Date; value: number }>
-    >();
-    const diaByDay = new Map<
-      string,
-      Array<{ date: Date; value: number }>
-    >();
+    const sysByDay = new Map<string, Array<{ date: Date; value: number }>>();
+    const diaByDay = new Map<string, Array<{ date: Date; value: number }>>();
     for (const m of recentMeasurements) {
       if (m.type === "BLOOD_PRESSURE_SYS") {
         const k = berlinDayKey(m.measuredAt);

src/components/targets/target-card.tsx

@@ -462,7 +462,7 @@ export function TargetCard({
                   <Tooltip>
                     <TooltipTrigger asChild>
                       <span
-                        className="text-foreground text-2xl leading-none font-semibold capitalize cursor-help sm:text-3xl"
+                        className="text-foreground cursor-help text-2xl leading-none font-semibold capitalize sm:text-3xl"
                         data-slot="target-headline-value"
                         data-mood-stability={moodStabilityValue}
                       >