feat: dynamic mode

backend/uframe/ir.py

@@ -237,7 +237,121 @@ class Status(IRNode):
 
 @dataclass
 class Table(IRNode):
-    """Box-drawn table (Phase 4)."""
+    """Box-drawn table."""
     title: str = ""
     columns: list[tuple[str, int]] = field(default_factory=list)  # (name, width)
     rows: list[list[str]] = field(default_factory=list)
+
+
+# ---------------------------------------------------------------------------
+# Form nodes
+# ---------------------------------------------------------------------------
+
+@dataclass
+class Form(IRNode):
+    """Form container grouping interactive fields."""
+    form_name: str = ""
+
+
+@dataclass
+class Field(IRNode):
+    """Text input field."""
+    field_name: str = ""
+    field_width: int = 24
+    placeholder: str = ""
+
+
+@dataclass
+class Password(IRNode):
+    """Masked password field."""
+    field_name: str = ""
+    field_width: int = 24
+    placeholder: str = ""
+
+
+@dataclass
+class Radio(IRNode):
+    """Radio button group — options separated by |."""
+    group: str = ""
+    options: list[str] = field(default_factory=list)
+
+
+@dataclass
+class Checkbox(IRNode):
+    """Checkbox field."""
+    field_name: str = ""
+    checkbox_label: str = ""
+    checked: bool = False
+
+
+@dataclass
+class FormButton(IRNode):
+    """Submit button — clickable link in Micron."""
+    button_label: str = ""
+    dest: str = ""
+
+
+# ---------------------------------------------------------------------------
+# Dynamic nodes (Phase 7)
+# ---------------------------------------------------------------------------
+
+class SourceType(Enum):
+    SHELL = auto()
+    FILE = auto()
+    JSON = auto()
+    PYTHON = auto()
+    RNS = auto()
+    PARAM = auto()
+
+
+@dataclass
+class Let(IRNode):
+    """Variable assignment: let name = "value" or let name = 1,2,3."""
+    var_name: str = ""
+    var_value: str = ""
+
+
+@dataclass
+class Source(IRNode):
+    """Data source resolved at render time (dynamic pages only)."""
+    var_name: str = ""
+    source_type: SourceType = SourceType.SHELL
+    command: str = ""
+    timeout: int = 5
+
+
+@dataclass
+class IfBlock(IRNode):
+    """Conditional block: if $var > threshold."""
+    condition: str = ""
+    # children = the "then" branch
+    elif_branches: list[tuple[str, list[IRNode]]] = field(default_factory=list)
+    else_children: list[IRNode] = field(default_factory=list)
+
+
+@dataclass
+class ForLoop(IRNode):
+    """Iteration: for item in $collection."""
+    var_name: str = ""
+    iterable: str = ""
+    # children = loop body
+
+
+@dataclass
+class CacheControl(IRNode):
+    """Cache header: cache 0 (never cache) or cache 300 (5 min)."""
+    seconds: int = 0
+
+
+@dataclass
+class OnSubmit(IRNode):
+    """Form submission handler: on_submit "form_name"."""
+    form_name: str = ""
+    # children = handler body
+
+
+@dataclass
+class StateDecl(IRNode):
+    """State persistence: state "name" "/path.json"."""
+    state_name: str = ""
+    path: str = ""