Daily Practice per section: mixed drills, stricter unlock, tick-and-skip one-tap

- One-tap mode no longer shows the answer when you're right: a green tick
  flashes and it skips straight to the next question. Wrong answers still
  show the full correction and now wait for an explicit Next tap.
- Every tab (Prepositions, Articles, Possessives, Pronouns) gets its own
  pinned Daily Practice card. Sessions mix questions from every lesson in
  the tab via a shuffle-bag over lesson ids.
- Daily Practice is locked until every lesson in its section has been
  passed (one full round at 70%); the locked card shows x/y progress.
- Finishing a daily session offers 'Continue: <section> Daily Practice'
  cycling to the next tab with an unlocked daily, with play again and
  back to menu as secondary options.

src/engine.js

@@ -237,25 +237,29 @@ export const LEVELS = [
   {id:5, tab:'article', name:'Genitiv', desc:'trotz, während, wegen, statt...', cases:['genitive'], preps:PREPS_BY_CASE.genitive, type:'article', artType:'definite'},
   {id:6, tab:'article', name:'Alles gemischt', desc:'All prepositions, definite articles', cases:['accusative','dative','genitive'], preps:[...SENTENCE_ACC_PREPS,...PREPS_BY_CASE.dative,...PREPS_BY_CASE.genitive,...PREPS_BY_CASE.wechsel], type:'article', artType:'definite', mixed:true},
   {id:7, tab:'article', name:'ein-Wörter', desc:'Everything with ein/eine/einem...', cases:['accusative','dative','genitive'], preps:[...SENTENCE_ACC_PREPS,...PREPS_BY_CASE.dative,...PREPS_BY_CASE.genitive,...PREPS_BY_CASE.wechsel], type:'article', artType:'indefinite', mixed:true},
+  // Daily Practice pseudo-levels (one per tab): a one-tap drill that mixes
+  // questions from every lesson in the tab. Rendered pinned at the top of each
+  // tab by App.jsx (not inline in the level list) and locked until every
+  // lesson in the tab has been passed.
+  {id:7.5, tab:'article', name:'Daily Practice', desc:'Every article lesson, mixed · one-tap', daily:true},
 
   {id:8,  tab:'prep', name:'Häufige Präpositionen', desc:'16 most common prepositions', preps:COMMON_PREPS, type:'prep'},
   {id:9,  tab:'prep', name:'Seltene Präpositionen', desc:'15 less common prepositions', preps:RARE_PREPS,   type:'prep'},
   {id:10, tab:'prep', name:'Alle Präpositionen',    desc:'All 31 prepositions mixed',   preps:ALL_PREPS,    type:'prep'},
-  // Daily Practice: unlocked once "Alle Präpositionen" is completed. Drills all
-  // 31 prepositions and defaults to one-tap mode. Rendered pinned at the top of
-  // the Prepositions tab by App.jsx, not inline in the level list.
-  {id:10.5, tab:'prep', name:'Daily Practice',       desc:'All 31 prepositions · one-tap daily drill', preps:ALL_PREPS, type:'prep', daily:true},
+  {id:10.5, tab:'prep', name:'Daily Practice',      desc:'Every preposition lesson, mixed · one-tap', daily:true},
   {id:18, tab:'prep', name:'Wechsel im Kontext',    desc:'Real sentences: Akkusativ or Dativ?', preps:PREPS_BY_CASE.wechsel, type:'wechselContext'},
   {id:19, tab:'prep', name:'Kontraktionen',         desc:'Contractions: am, ins, zum, beim…', type:'contraction'},
 
   {id:11, tab:'poss', name:'Häufige Possessive',   desc:'mein · dein · sein — Akkusativ & Dativ', possessives:['mein','dein','sein'], cases:['accusative','dative'], type:'poss'},
   {id:12, tab:'poss', name:'Schwierige Possessive', desc:'ihr · unser · euer — Akkusativ & Dativ', possessives:['ihr','unser','euer'], cases:['accusative','dative'], type:'poss'},
   {id:13, tab:'poss', name:'Alle gemischt',         desc:'mein, dein, sein, ihr, unser, euer — incl. Genitiv', possessives:['mein','dein','sein','ihr','unser','euer'], cases:['accusative','dative','genitive'], type:'poss'},
+  {id:13.5, tab:'poss', name:'Daily Practice', desc:'Every possessive lesson, mixed · one-tap', daily:true},
 
   {id:14, tab:'pronoun', name:'Singular Pronomen', desc:'mich, mir, dich, dir…',            pronouns:SG_PRONOUN_KEYS,      cases:['accusative','dative'], type:'pronoun'},
   {id:15, tab:'pronoun', name:'Plural Pronomen',   desc:'uns, euch, ihnen…',                pronouns:PL_PRONOUN_KEYS,      cases:['accusative','dative'], type:'pronoun'},
   {id:16, tab:'pronoun', name:'Sie (formal)',      desc:'Formal Sie — singular and plural', pronouns:FORMAL_PRONOUN_KEYS,  cases:['accusative','dative'], type:'pronoun'},
   {id:17, tab:'pronoun', name:'Alle gemischt',     desc:'All 10 pronouns, Akkusativ & Dativ', pronouns:ALL_PRONOUN_KEYS,   cases:['accusative','dative'], type:'pronoun'},
+  {id:17.5, tab:'pronoun', name:'Daily Practice', desc:'Every pronoun lesson, mixed · one-tap', daily:true},
 ];
 
 // Contractions (preposition + article). pref:true = preferred even in writing.
@@ -440,7 +444,25 @@ export function newState() {
 }
 
 // A practice session: one shuffle-bag + anti-repeat memory per round.
+// Daily levels mix questions from every lesson in their tab: a shuffle-bag
+// deals the lesson ids so no lesson repeats back-to-back, and each lesson
+// keeps its own state (their bag pools differ, so they can't share one).
 export function createSession(levelId) {
+  const lv = LEVELS.find(l => l.id === levelId);
+  if (lv?.daily) {
+    const lessonIds = LEVELS.filter(l => l.tab === lv.tab && !l.daily).map(l => l.id);
+    const meta = newState();
+    const states = {};
+    return {
+      next: () => {
+        const id = drawBag(meta, 'lvl', lessonIds, meta.last.lvl);
+        meta.last.lvl = id;
+        if (!states[id]) states[id] = newState();
+        return gen(id, states[id]);
+      },
+      state: meta,
+    };
+  }
   const state = newState();
   return { next: () => gen(levelId, state), state };
 }