feat(sources): UI fuer Quellen-Klassifikation (Filter, Badges, Edit-Form)

- Quellen-Modal: 4 neue Filter (Politik, Medientyp, Reliability, Alignment).
- Edit-Form: Selects fuer political_orientation/media_type/reliability,
  Multi-Select-Chips fuer alignments, Toggle state_affiliated, Country-Code-Input.
- renderSourceGroup: Politik-Badge mit DACH-Farbskala (rot=L, blau=R),
  Reliability-Punkt (gruen→rot), Alignment-Tags, state-affiliated-Indikator.
  Tooltip um alle 4 Achsen erweitert.
- CSS-Block fuer alle neuen Badge-/Chip-Styles.

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

src/static/css/style.css

@@ -3503,6 +3503,117 @@ a.dev-source-pill:hover {
     color: var(--info);
 }
 
+/* Klassifikations-Badges (politisch / reliability / alignments / state) */
+.source-classification-badges {
+    display: inline-flex;
+    align-items: center;
+    gap: 4px;
+    flex-wrap: wrap;
+}
+
+.source-political-badge {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    min-width: 22px;
+    padding: 2px 6px;
+    border-radius: var(--radius);
+    font-size: 10px;
+    font-weight: 700;
+    letter-spacing: 0.4px;
+    color: #fff;
+    background: #9e9e9e;
+}
+.source-political-badge.pol-links_extrem { background: #b71c1c; }
+.source-political-badge.pol-links { background: #e53935; }
+.source-political-badge.pol-mitte_links { background: #ef9a9a; color: #4a0d0d; }
+.source-political-badge.pol-liberal { background: #fdd835; color: #4a3700; }
+.source-political-badge.pol-mitte { background: #9e9e9e; }
+.source-political-badge.pol-konservativ { background: #90caf9; color: #0d2740; }
+.source-political-badge.pol-mitte_rechts { background: #5c6bc0; }
+.source-political-badge.pol-rechts { background: #1976d2; }
+.source-political-badge.pol-rechts_extrem { background: #0d47a1; }
+
+.source-reliability-dot {
+    display: inline-block;
+    width: 10px;
+    height: 10px;
+    border-radius: 50%;
+    background: #9e9e9e;
+    border: 1px solid rgba(0, 0, 0, 0.15);
+}
+.source-reliability-dot.rel-sehr_hoch { background: #2e7d32; }
+.source-reliability-dot.rel-hoch { background: #66bb6a; }
+.source-reliability-dot.rel-gemischt { background: #fbc02d; }
+.source-reliability-dot.rel-niedrig { background: #ef6c00; }
+.source-reliability-dot.rel-sehr_niedrig { background: #c62828; }
+
+.source-state-badge {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    background: #4a148c;
+    color: #fff;
+    font-size: 11px;
+    line-height: 1;
+}
+
+.source-alignment-chip-badge {
+    display: inline-flex;
+    align-items: center;
+    padding: 1px 6px;
+    border-radius: 999px;
+    font-size: 10px;
+    font-weight: 500;
+    background: var(--cat-sonstige-bg, #eef);
+    color: var(--text-secondary, #555);
+    border: 1px solid rgba(0, 0, 0, 0.08);
+}
+
+/* Edit-Form: Klassifikations-Sektion */
+.sources-classification-section {
+    margin-top: 12px;
+    padding-top: 12px;
+    border-top: 1px solid var(--border-color, rgba(0,0,0,0.08));
+}
+.sources-classification-header {
+    font-size: 12px;
+    font-weight: 600;
+    color: var(--text-secondary, #555);
+    margin-bottom: 8px;
+    letter-spacing: 0.3px;
+    text-transform: uppercase;
+}
+.alignment-chips {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 6px;
+}
+.alignment-chip {
+    display: inline-flex;
+    align-items: center;
+    padding: 4px 10px;
+    border-radius: 999px;
+    font-size: 11px;
+    font-weight: 500;
+    background: transparent;
+    color: var(--text-secondary, #555);
+    border: 1px solid var(--border-color, rgba(0,0,0,0.15));
+    cursor: pointer;
+    transition: all 0.12s ease;
+}
+.alignment-chip:hover {
+    background: var(--cat-sonstige-bg, #eef);
+}
+.alignment-chip.active {
+    background: var(--primary, #2a81cb);
+    color: #fff;
+    border-color: var(--primary, #2a81cb);
+}
+
 /* Typ-Badges */
 .source-type-badge {
     display: inline-flex;