Fixes #28 — Curated reflexive verb list on detail + practice filter

Bundles the 100 most common reflexive verbs from spanishwithdaniel.com as a
canonical list and wires it through the UI. Compound list entries (recibirse
/ graduarse, equivocarse / confundirse) are split. Trailing prepositions and
set-phrase completions are captured as usageHint (e.g. acordarse "de",
ponerse "de acuerdo").

ReflexiveVerbStore loads the JSON at launch and exposes lookups by base
infinitive, both via @Environment for SwiftUI and a static shared instance
for services. Verbs whose bare infinitive isn't in the list skip the UI
treatment silently.

VerbDetailView shows a new Reflexive section with the reflexive infinitive,
usage hint, and English meaning when there is a match. VerbListView gains a
"Reflexive verbs only" filter alongside the existing Level and Irregularity
filters. Settings adds the same flag so it also constrains the practice
pool; PracticeSessionService applies the reflexive filter in all six pick
paths.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Conjuga/SharedModels/Sources/SharedModels/ReflexiveVerb.swift

@@ -0,0 +1,23 @@
+import Foundation
+
+/// A single entry from the curated "100 most common reflexive verbs" list
+/// (Gitea issue #28). Sourced from spanishwithdaniel.com.
+///
+/// `baseInfinitive` is the stem without the reflexive "-se" suffix, used to
+/// match this entry to the app's Verb records (which store bare infinitives).
+/// `usageHint` captures trailing prepositions or set-phrase completions — e.g.,
+/// "a" for `acercarse a`, "de acuerdo" for `ponerse de acuerdo`. Nil when the
+/// reflexive form has no commonly paired preposition.
+public struct ReflexiveVerb: Codable, Hashable, Sendable {
+    public let infinitive: String
+    public let baseInfinitive: String
+    public let english: String
+    public let usageHint: String?
+
+    public init(infinitive: String, baseInfinitive: String, english: String, usageHint: String? = nil) {
+        self.infinitive = infinitive
+        self.baseInfinitive = baseInfinitive
+        self.english = english
+        self.usageHint = usageHint
+    }
+}